Tess4j不好用，识别不准确，选择付费的百度人工智能API

Tess4J/build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="Tess4J" default="default" basedir=".">
+    <description>Builds, tests, and runs the project Tess4J.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <property name="version" value="3.4.8"/>
+
+    <target name="-pre-compile">
+        <copy todir="${build.classes.dir}">
+            <fileset dir="lib" includes="win32-x86/**,win32-x86-64/**" />
+        </copy>
+    </target>
+    <target name="-post-jar">
+        <move todir="./">
+            <fileset dir="${dist.dir}" includes="${ant.project.name}.jar" />
+        </move>
+        <delete dir="${dist.dir}/lib"/>
+    </target>
+    <target name="-post-clean">
+        <delete file="${ant.project.name}.jar"/>
+        <delete>
+            <fileset dir="${test.src.dir}/test-results" includes="**"/>
+        </delete>
+    </target>
+    <target name="dist" depends="clean,jar"
+            description="create binary and source distribution archives">
+        <mkdir dir="${dist.dir}"/>
+        <zip zipfile="${dist.dir}/${ant.project.name}-${version}-src.zip">
+            <zipfileset dir="." prefix="${ant.project.name}">
+                <exclude name="**/.*"/>
+                <!--<exclude name="${dist.dir}/**"/>-->
+                <exclude name="${build.dir}/**"/>
+                <exclude name="doc/**"/>
+                <!--<exclude name="${ant.project.name}.jar"/>-->
+                <exclude name="native/**"/>
+            </zipfileset>
+        </zip>
+        <!--
+        <zip zipfile="${dist.dir}/${ant.project.name}-${version}.zip">
+            <zipfileset dir="." includes="*,lib/**,tessdata/**,${dist.jar}" prefix="${ant.project.name}"
+                        excludes="build.xml,src,build,dist,doc,test,nbproject,native,eurotext.*">
+                <exclude name="*.mf"/>
+            </zipfileset>
+        </zip>
+        -->
+        <delete dir="${dist.dir}/lib"/>
+    </target>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar-with-manifest:    JAR building (if you are using a manifest)
+      -do-jar-without-manifest: JAR building (if you are not using a manifest)
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="Tess4J-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

Tess4J/dist/README.TXT

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+========================
+BUILD OUTPUT DESCRIPTION
+========================
+
+When you build an Java application project that has a main class, the IDE
+automatically copies all of the JAR
+files on the projects classpath to your projects dist/lib folder. The IDE
+also adds each of the JAR files to the Class-Path element in the application
+JAR files manifest file (MANIFEST.MF).
+
+To run the project from the command line, go to the dist folder and
+type the following:
+
+java -jar "tess4j-3.4.8.jar" 
+
+To distribute this project, zip up the dist folder (including the lib folder)
+and distribute the ZIP file.
+
+Notes:
+
+* If two JAR files on the project classpath have the same name, only the first
+JAR file is copied to the lib folder.
+* Only JAR files are copied to the lib folder.
+If the classpath contains other types of files or folders, these files (folders)
+are not copied.
+* If a library on the projects classpath also has a Class-Path element
+specified in the manifest,the content of the Class-Path element has to be on
+the projects runtime path.
+* To set a main class in a standard Java project, right-click the project node
+in the Projects window and choose Properties. Then click Run and enter the
+class name in the Main Class field. Alternatively, you can manually type the
+class name in the manifest Main-Class element.

Tess4J/lib/nblibraries.properties

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+# To change this template, choose Tools | Templates
+# and open the template in the editor.
+
+libs.hamcrest.classpath=\
+    ${base}/hamcrest-core-1.3.jar
+libs.hamcrest.displayName=Hamcrest 1.3
+libs.hamcrest.prop-maven-dependencies=org.hamcrest:hamcrest-core:1.3:jar
+libs.junit_4.classpath=\
+    ${base}/junit-4.12.jar
+libs.junit_4.displayName=JUnit 4.12
+libs.junit_4.prop-maven-dependencies=junit:junit:4.12:jar

Tess4J/nbproject/genfiles.properties

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+build.xml.data.CRC32=1dc6a699
+build.xml.script.CRC32=f0eaf91d
+build.xml.stylesheet.CRC32=28e38971@1.38.2.45
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=1f03e186
+nbproject/build-impl.xml.script.CRC32=a52f4060
+nbproject/build-impl.xml.stylesheet.CRC32=3a2fa800@1.88.0.48

Tess4J/nbproject/private/private.properties

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+compile.on.save=true
+do.depend=true
+do.jar=true
+do.jlink=false
+javac.debug=false
+javadoc.preview=true
+jlink.strip=false
+user.properties.file=C:\\Users\\Quan\\AppData\\Roaming\\NetBeans\\dev\\build.properties

Tess4J/nbproject/private/private.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project-private xmlns="http://www.netbeans.org/ns/project-private/1">
+    <editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
+    <open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
+        <group/>
+    </open-files>
+</project-private>

Tess4J/nbproject/project.properties

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+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+application.desc=A Java wrapper for Tesseract OCR API
+application.homepage=http://tess4j.sf.net
+application.title=Tess4J
+application.vendor=Quan Nguyen
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.modulepath=\
+    ${run.modulepath}
+debug.test.classpath=\
+    ${run.test.classpath}
+debug.test.modulepath=\
+    ${run.test.modulepath}
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/tess4j-${version}.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+endorsed.classpath=
+excludes=
+file.reference.commons-beanutils-1.9.2.jar=lib/commons-beanutils-1.9.2.jar
+file.reference.commons-io-2.6.jar=lib/commons-io-2.6.jar
+file.reference.commons-logging-1.2.jar=lib/commons-logging-1.2.jar
+file.reference.fontbox-2.0.9.jar=lib/fontbox-2.0.9.jar
+file.reference.ghost4j-1.0.1.jar=lib/ghost4j-1.0.1.jar
+file.reference.itext-2.1.7.jar=lib/itext-2.1.7.jar
+file.reference.jai-imageio-core-1.4.0.jar=lib/jai-imageio-core-1.4.0.jar
+file.reference.jbig2-imageio-3.0.0.jar=lib/jbig2-imageio-3.0.0.jar
+file.reference.jboss-vfs-3.2.12.Final.jar=lib/jboss-vfs-3.2.12.Final.jar
+file.reference.jna-4.1.0.jar=lib/jna-4.1.0.jar
+file.reference.jul-to-slf4j-1.7.25.jar=lib/jul-to-slf4j-1.7.25.jar
+file.reference.lept4j-1.6.4.jar=lib/lept4j-1.6.4.jar
+file.reference.log4j-1.2.17.jar=lib/log4j-1.2.17.jar
+file.reference.logback-classic-1.2.3.jar=lib/logback-classic-1.2.3.jar
+file.reference.logback-core-1.2.3.jar=lib/logback-core-1.2.3.jar
+file.reference.pdfbox-2.0.9.jar=lib/pdfbox-2.0.9.jar
+file.reference.pdfbox-tools-2.0.9.jar=lib/pdfbox-tools-2.0.9.jar
+file.reference.slf4j-api-1.7.25.jar=lib/slf4j-api-1.7.25.jar
+includes=**
+jar.archive.disabled=${jnlp.enabled}
+jar.compress=false
+jar.index=${jnlp.enabled}
+javac.classpath=\
+    ${file.reference.ghost4j-1.0.1.jar}:\
+    ${file.reference.jna-4.1.0.jar}:\
+    ${file.reference.log4j-1.2.17.jar}:\
+    ${file.reference.itext-2.1.7.jar}:\
+    ${file.reference.commons-beanutils-1.9.2.jar}:\
+    ${file.reference.commons-logging-1.2.jar}:\
+    ${file.reference.slf4j-api-1.7.25.jar}:\
+    ${file.reference.jul-to-slf4j-1.7.25.jar}:\
+    ${file.reference.commons-io-2.6.jar}:\
+    ${file.reference.jboss-vfs-3.2.12.Final.jar}:\
+    ${file.reference.logback-classic-1.2.3.jar}:\
+    ${file.reference.logback-core-1.2.3.jar}:\
+    ${file.reference.jai-imageio-core-1.4.0.jar}:\
+    ${file.reference.lept4j-1.6.4.jar}:\
+    ${file.reference.pdfbox-2.0.9.jar}:\
+    ${file.reference.pdfbox-tools-2.0.9.jar}:\
+    ${file.reference.fontbox-2.0.9.jar}:\
+    ${file.reference.jbig2-imageio-3.0.0.jar}
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=true
+javac.external.vm=false
+javac.modulepath=
+javac.processormodulepath=
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=1.7
+javac.target=1.7
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}:\
+    ${libs.junit_4.classpath}:\
+    ${libs.hamcrest.classpath}
+javac.test.modulepath=\
+    ${javac.modulepath}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.html5=false
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=Tess4J API
+jlink.launcher=false
+jlink.launcher.name=Tess4J
+jnlp.codebase.type=no.codebase
+jnlp.descriptor=application
+jnlp.enabled=false
+jnlp.mixed.code=default
+jnlp.offline-allowed=false
+jnlp.signed=false
+jnlp.signing=
+jnlp.signing.alias=
+jnlp.signing.keystore=
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project
+# (you may also define separate properties like run-sys-prop.name=value instead of -Dname=value
+# or test-sys-prop.name=value to set system properties for unit tests):
+run.jvmargs=
+run.modulepath=\
+    ${javac.modulepath}
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+run.test.modulepath=\
+    ${javac.test.modulepath}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

Tess4J/nbproject/project.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>Tess4J</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+        <libraries xmlns="http://www.netbeans.org/ns/ant-project-libraries/1">
+            <definitions>.\lib\nblibraries.properties</definitions>
+        </libraries>
+        <references xmlns="http://www.netbeans.org/ns/ant-project-references/1"/>
+    </configuration>
+</project>

Tess4J/readme.html

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+<html>
+<head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Tess4J - Java Wrapper for Tesseract OCR API</title>
+</head>
+<body>
+    <div class="Section1">
+        <h2 align="center">
+            Tess4J
+        </h2>
+        <h3>
+            DESCRIPTION
+        </h3>
+        <p>
+            Tess4J is a JNA wrapper for <a href="https://github.com/tesseract-ocr">Tesseract OCR
+                API</a>; it provides character recognition support for common image formats,
+            multi-page images, and PDF documents. The library has been developed and tested
+            on Windows and Linux.
+        </p>
+        <p>
+            Tess4J is released and distributed under the <a href="http://www.apache.org/licenses/LICENSE-2.0.html">
+                Apache License, v2.0</a>. Its official homepage is at <a href="http://tess4j.sourceforge.net/">
+                    http://tess4j.sourceforge.net</a>.
+        </p>
+        <h3>
+            SOFTWARE REQUIREMENTS
+        </h3>
+        <p>
+            <a href="http://java.oracle.com/">Java Runtime Environment</a>, <a href="https://github.com/twall/jna">
+                JNA</a>, and <a href="https://java.net/projects/jai-imageio">JAI-ImageIO</a>
+            are required. <a href="http://ant.apache.org/">Apache Ant</a> and <a href="http://www.junit.org/">
+                JUnit</a> are used for program building and unit testing. The Tesseract DLLs
+            were built with VS2015 and therefore depend on the <a href="https://www.microsoft.com/en-us/download/details.aspx?id=53587">
+                Visual C++ 2015 Redistributable Packages</a>.
+        </p>
+        <h3>
+            INSTRUCTIONS
+        </h3>
+        <p>
+            Tesseract 3.05.01 and Leptonica 1.74.4 (via Lept4J) 32- and 64-bit
+            DLLs, language data for English, and sample images are bundled with the library.
+            <a href="https://github.com/tesseract-ocr/tessdata">Language data packs</a> for
+            Tesseract should be decompressed and placed into the <code>tessdata</code> folder.
+        </p>
+        <p>
+            The Linux shared object library (<code>libtesseract.so</code>) equivalent to the
+            DLL is available in Tesseract 3.05.01, which can be built from the <a href="https://github.com/tesseract-ocr/tesseract"
+                target="_blank">source</a> with the instructions given in <a href="https://github.com/tesseract-ocr/tesseract/wiki/Compiling"
+                    target="_blank">Tesseract Wiki</a>.
+        </p>
+        <p>
+            To unit test, at the command line, execute:
+        </p>
+        <blockquote>
+            <p>
+                <code>ant test</code>
+            </p>
+        </blockquote>
+        <p>
+            Support for PDF documents is available through either 
+			<a href="http://www.ghostscript.com/" target="_blank">GPL Ghostscript</a>, which should be installed and included
+            in system path, or PDFBox, if Ghostscript is not available.
+        </p>
+        <p>
+            Images to be OCRed should be scanned at resolution from at least 200 DPI (dot per
+            inch) to 400 DPI in monochrome (black&amp;white) or grayscale. Scanning at higher
+            resolutions will not necessarily result in better recognition accuracy. The actual
+            success rates depend greatly on the quality of the scanned image. The typical settings
+            for scanning are 300 DPI and 1 bpp (bit per pixel) black&amp;white or 8 bpp grayscale
+            uncompressed TIFF or PNG format. PNG is usually smaller in size than other image
+            formats and still keeps high quality due to its employing lossless data compression
+            algorithms; TIFF has the advantage of the ability to contain multiple images (pages)
+            in a file.
+        </p>
+        <p>
+            Several built-in functions are also provided for merging several images or PDF files
+            into a single one for convenient OCR operations, or for splitting a PDF file into
+            smaller ones if it is too large, which can cause out-of-memory exceptions.
+        </p>
+        <h3>
+            CODE EXAMPLES
+        </h3>
+        <p>
+            The following code example shows common usage of the library. Make sure <code>tessdata</code>
+            folder is populated with appropriate language data files and the <code>.jar</code>
+            files are in the classpath. On Windows, the DLLs will be automatically extracted
+            from <code>tess4j.jar</code> to the default temporary directory and loaded.
+        </p>
+        <blockquote>
+            <pre>
+package net.sourceforge.tess4j.example;
+
+import java.io.File;
+import net.sourceforge.tess4j.*;
+
+public class TesseractExample {
+    public static void main(String[] args) {
+        // ImageIO.scanForPlugins(); // for server environment
+        File imageFile = new File("eurotext.tif");
+        ITesseract instance = new Tesseract(); // JNA Interface Mapping
+        // ITesseract instance = new Tesseract1(); // JNA Direct Mapping
+        // instance.setDatapath("&lt;parentPath&gt;"); // replace &lt;parentPath&gt; with path to parent directory of tessdata
+        // instance.setLanguage("eng");
+
+        try {
+            String result = instance.doOCR(imageFile);
+            System.out.println(result);
+        } catch (TesseractException e) {
+            System.err.println(e.getMessage());
+        }
+    }
+}
+</pre>
+        </blockquote>
+        <h3>
+            DOCUMENTATIONS
+        </h3>
+        <p>
+            Please visit the website for the library's <a href="http://tess4j.sf.net/docs/">documentations</a>
+        </p>
+        <hr />
+    </div>
+</body>
+</html>

Tess4J/src/com/recognition/software/jdeskew/ImageDeskew.java

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+/**
+ * <a url=http://www.jdeskew.com/>JDeskew</a>
+ */
+package com.recognition.software.jdeskew;
+
+import java.awt.image.BufferedImage;
+
+public class ImageDeskew {
+
+    /**
+     * Representation of a line in the image.
+     */
+    public class HoughLine {
+
+        // count of points in the line
+        public int count = 0;
+        // index in matrix.
+        public int index = 0;
+        // the line is represented as all x, y that solve y * cos(alpha) - x *
+        // sin(alpha) = d
+        public double alpha;
+        public double d;
+    }
+
+    // the source image
+    private BufferedImage cImage;
+    // the range of angles to search for lines
+    private double cAlphaStart = -20;
+    private double cAlphaStep = 0.2;
+    private int cSteps = 40 * 5;
+    // pre-calculation of sin and cos
+    private double[] cSinA;
+    private double[] cCosA;
+    // range of d
+    private double cDMin;
+    private double cDStep = 1.0;
+    private int cDCount;
+    // count of points that fit in a line
+    private int[] cHMatrix;
+
+    /**
+     * Constructor.
+     * 
+     * @param image 
+     */
+    public ImageDeskew(BufferedImage image) {
+        this.cImage = image;
+    }
+
+    /**
+     * Calculates the skew angle of the image cImage.
+     * 
+     * @return 
+     */
+    public double getSkewAngle() {
+        ImageDeskew.HoughLine[] hl;
+        double sum = 0.0;
+        int count = 0;
+
+        // perform Hough Transformation
+        calc();
+        // top 20 of the detected lines in the image
+        hl = getTop(20);
+
+        if (hl.length >= 20) {
+            // average angle of the lines
+            for (int i = 0; i < 19; i++) {
+                sum += hl[i].alpha;
+                count++;
+            }
+            return (sum / count);
+        } else {
+            return 0.0d;
+        }
+    }
+
+    // calculate the count lines in the image with most points
+    private ImageDeskew.HoughLine[] getTop(int count) {
+
+        ImageDeskew.HoughLine[] hl = new ImageDeskew.HoughLine[count];
+        for (int i = 0; i < count; i++) {
+            hl[i] = new ImageDeskew.HoughLine();
+        }
+
+        ImageDeskew.HoughLine tmp;
+
+        for (int i = 0; i < (this.cHMatrix.length - 1); i++) {
+            if (this.cHMatrix[i] > hl[count - 1].count) {
+                hl[count - 1].count = this.cHMatrix[i];
+                hl[count - 1].index = i;
+                int j = count - 1;
+                while ((j > 0) && (hl[j].count > hl[j - 1].count)) {
+                    tmp = hl[j];
+                    hl[j] = hl[j - 1];
+                    hl[j - 1] = tmp;
+                    j--;
+                }
+            }
+        }
+
+        int alphaIndex;
+        int dIndex;
+        
+        for (int i = 0; i < count; i++) {
+            dIndex = hl[i].index / cSteps; // integer division, no
+            // remainder
+            alphaIndex = hl[i].index - dIndex * cSteps;
+            hl[i].alpha = getAlpha(alphaIndex);
+            hl[i].d = dIndex + cDMin;
+        }
+
+        return hl;
+    }
+
+    // Hough Transformation
+    private void calc() {
+        int hMin = (int) ((this.cImage.getHeight()) / 4.0);
+        int hMax = (int) ((this.cImage.getHeight()) * 3.0 / 4.0);
+        init();
+
+        for (int y = hMin; y < hMax; y++) {
+            for (int x = 1; x < (this.cImage.getWidth() - 2); x++) {
+                // only lower edges are considered
+                if (ImageUtil.isBlack(this.cImage, x, y)) {
+                    if (!ImageUtil.isBlack(this.cImage, x, y + 1)) {
+                        calc(x, y);
+                    }
+                }
+            }
+        }
+
+    }
+
+    // calculate all lines through the point (x,y)
+    private void calc(int x, int y) {
+        double d;
+        int dIndex;
+        int index;
+
+        for (int alpha = 0; alpha < (this.cSteps - 1); alpha++) {
+            d = y * this.cCosA[alpha] - x * this.cSinA[alpha];
+            dIndex = (int) (d - this.cDMin);
+            index = dIndex * this.cSteps + alpha;
+            try {
+                this.cHMatrix[index] += 1;
+            } catch (Exception ex) {
+                System.out.println(ex.toString());
+            }
+        }
+    }
+
+    private void init() {
+
+        double angle;
+
+        // pre-calculation of sin and cos
+        this.cSinA = new double[this.cSteps - 1];
+        this.cCosA = new double[this.cSteps - 1];
+
+        for (int i = 0; i < (this.cSteps - 1); i++) {
+            angle = getAlpha(i) * Math.PI / 180.0;
+            this.cSinA[i] = Math.sin(angle);
+            this.cCosA[i] = Math.cos(angle);
+        }
+
+        // range of d
+        this.cDMin = -this.cImage.getWidth();
+        this.cDCount = (int) (2.0 * ((this.cImage.getWidth() + this.cImage.getHeight())) / this.cDStep);
+        this.cHMatrix = new int[this.cDCount * this.cSteps];
+    }
+
+    public double getAlpha(int index) {
+        return this.cAlphaStart + (index * this.cAlphaStep);
+    }
+}

Tess4J/src/com/recognition/software/jdeskew/ImageUtil.java

@@ -0,0 +1,132 @@
+/**
+ * <a url=http://www.jdeskew.com/>JDeskew</a>
+ */
+package com.recognition.software.jdeskew;
+
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+import java.awt.image.WritableRaster;
+
+public class ImageUtil {
+
+    /**
+     * Whether the pixel is black.
+     * 
+     * @param image source image
+     * @param x
+     * @param y
+     * @return 
+     */
+    public static boolean isBlack(BufferedImage image, int x, int y) {
+        if (image.getType() == BufferedImage.TYPE_BYTE_BINARY) {
+            WritableRaster raster = image.getRaster();
+            int pixelRGBValue = raster.getSample(x, y, 0);
+            return pixelRGBValue == 0;
+        }
+
+        int luminanceValue = 140;
+        return isBlack(image, x, y, luminanceValue);
+    }
+
+    /**
+     * Whether the pixel is black.
+     * 
+     * @param image source image
+     * @param x
+     * @param y
+     * @param luminanceCutOff
+     * @return 
+     */
+    public static boolean isBlack(BufferedImage image, int x, int y, int luminanceCutOff) {
+        int pixelRGBValue;
+        int r;
+        int g;
+        int b;
+        double luminance = 0.0;
+
+        // return white on areas outside of image boundaries
+        if (x < 0 || y < 0 || x > image.getWidth() || y > image.getHeight()) {
+            return false;
+        }
+
+        try {
+            pixelRGBValue = image.getRGB(x, y);
+            r = (pixelRGBValue >> 16) & 0xff;
+            g = (pixelRGBValue >> 8) & 0xff;
+            b = (pixelRGBValue) & 0xff;
+            luminance = (r * 0.299) + (g * 0.587) + (b * 0.114);
+        } catch (Exception e) {
+            // ignore.
+        }
+
+        return luminance < luminanceCutOff;
+    }
+
+    /**
+     * Rotates image.
+     * 
+     * @param image source image
+     * @param angle by degrees
+     * @param cx x-coordinate of pivot point
+     * @param cy y-coordinate of pivot point
+     * @return rotated image
+     */
+    public static BufferedImage rotate(BufferedImage image, double angle, int cx, int cy) {
+        int width = image.getWidth(null);
+        int height = image.getHeight(null);
+
+        int minX, minY, maxX, maxY;
+        minX = minY = maxX = maxY = 0;
+
+        int[] corners = {0, 0, width, 0, width, height, 0, height};
+
+        double theta = Math.toRadians(angle);
+        for (int i = 0; i < corners.length; i += 2) {
+            int x = (int) (Math.cos(theta) * (corners[i] - cx)
+                    - Math.sin(theta) * (corners[i + 1] - cy) + cx);
+            int y = (int) (Math.sin(theta) * (corners[i] - cx)
+                    + Math.cos(theta) * (corners[i + 1] - cy) + cy);
+
+            if (x > maxX) {
+                maxX = x;
+            }
+
+            if (x < minX) {
+                minX = x;
+            }
+
+            if (y > maxY) {
+                maxY = y;
+            }
+
+            if (y < minY) {
+                minY = y;
+            }
+
+        }
+
+        cx = (cx - minX);
+        cy = (cy - minY);
+
+        BufferedImage bi = new BufferedImage((maxX - minX), (maxY - minY),
+                image.getType());
+        Graphics2D g2 = bi.createGraphics();
+        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
+                RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+
+        g2.setBackground(Color.white);
+        g2.fillRect(0, 0, bi.getWidth(), bi.getHeight());
+
+        AffineTransform at = new AffineTransform();
+        at.rotate(theta, cx, cy);
+
+        g2.setTransform(at);
+        g2.drawImage(image, -minX, -minY, null);
+        g2.dispose();
+
+        return bi;
+    }
+}

Tess4J/src/net/sourceforge/tess4j/ITessAPI.java

@@ -0,0 +1,617 @@
+/**
+ * Copyright @ 2014 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import com.sun.jna.Callback;
+import com.sun.jna.NativeLong;
+import com.sun.jna.Pointer;
+import com.sun.jna.PointerType;
+import com.sun.jna.Structure;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * An interface represents common TessAPI classes/constants.
+ */
+public interface ITessAPI {
+
+    /**
+     * When Tesseract/Cube is initialized we can choose to instantiate/load/run
+     * only the Tesseract part, only the Cube part or both along with the
+     * combiner. The preference of which engine to use is stored in
+     * <code>tessedit_ocr_engine_mode</code>.<br>
+     * <br>
+     * ATTENTION: When modifying this enum, please make sure to make the
+     * appropriate changes to all the enums mirroring it (e.g. OCREngine in
+     * cityblock/workflow/detection/detection_storage.proto). Such enums will
+     * mention the connection to OcrEngineMode in the comments.
+     */
+    public static interface TessOcrEngineMode {
+
+        /**
+         * Run Tesseract only - fastest
+         */
+        public static final int OEM_TESSERACT_ONLY = 0;
+        /**
+         * Run Cube only - better accuracy, but slower
+         */
+        public static final int OEM_CUBE_ONLY = 1;
+        /**
+         * Run both and combine results - best accuracy
+         */
+        public static final int OEM_TESSERACT_CUBE_COMBINED = 2;
+        /**
+         * Specify this mode when calling <code>init_*()</code>, to indicate
+         * that any of the above modes should be automatically inferred from the
+         * variables in the language-specific config, command-line configs, or
+         * if not specified in any of the above should be set to the default
+         * <code>OEM_TESSERACT_ONLY</code>.
+         */
+        public static final int OEM_DEFAULT = 3;
+    };
+
+    /**
+     * Possible modes for page layout analysis. These *must* be kept in order of
+     * decreasing amount of layout analysis to be done, except for
+     * <code>OSD_ONLY</code>, so that the inequality test macros below work.
+     */
+    public static interface TessPageSegMode {
+
+        /**
+         * Orientation and script detection only.
+         */
+        public static final int PSM_OSD_ONLY = 0;
+        /**
+         * Automatic page segmentation with orientation and script detection.
+         * (OSD)
+         */
+        public static final int PSM_AUTO_OSD = 1;
+        /**
+         * Automatic page segmentation, but no OSD, or OCR.
+         */
+        public static final int PSM_AUTO_ONLY = 2;
+        /**
+         * Fully automatic page segmentation, but no OSD.
+         */
+        public static final int PSM_AUTO = 3;
+        /**
+         * Assume a single column of text of variable sizes.
+         */
+        public static final int PSM_SINGLE_COLUMN = 4;
+        /**
+         * Assume a single uniform block of vertically aligned text.
+         */
+        public static final int PSM_SINGLE_BLOCK_VERT_TEXT = 5;
+        /**
+         * Assume a single uniform block of text.
+         */
+        public static final int PSM_SINGLE_BLOCK = 6;
+        /**
+         * Treat the image as a single text line.
+         */
+        public static final int PSM_SINGLE_LINE = 7;
+        /**
+         * Treat the image as a single word.
+         */
+        public static final int PSM_SINGLE_WORD = 8;
+        /**
+         * Treat the image as a single word in a circle.
+         */
+        public static final int PSM_CIRCLE_WORD = 9;
+        /**
+         * Treat the image as a single character.
+         */
+        public static final int PSM_SINGLE_CHAR = 10;
+        /**
+         * Find as much text as possible in no particular order.
+         */
+        public static final int PSM_SPARSE_TEXT = 11;
+        /**
+         * Sparse text with orientation and script detection.
+         */
+        public static final int PSM_SPARSE_TEXT_OSD = 12;
+        /**
+         * Number of enum entries.
+         */
+        public static final int PSM_COUNT = 13;
+    };
+
+    /**
+     * Enum of the elements of the page hierarchy, used in
+     * <code>ResultIterator</code> to provide functions that operate on each
+     * level without having to have 5x as many functions.
+     */
+    public static interface TessPageIteratorLevel {
+
+        /**
+         * Block of text/image/separator line.
+         */
+        public static final int RIL_BLOCK = 0;
+        /**
+         * Paragraph within a block.
+         */
+        public static final int RIL_PARA = 1;
+        /**
+         * Line within a paragraph.
+         */
+        public static final int RIL_TEXTLINE = 2;
+        /**
+         * Word within a textline.
+         */
+        public static final int RIL_WORD = 3;
+        /**
+         * Symbol/character within a word.
+         */
+        public static final int RIL_SYMBOL = 4;
+    };
+
+    /**
+     * Possible types for a POLY_BLOCK or ColPartition. Must be kept in sync
+     * with <code>kPBColors</code> in polyblk.cpp and <code>PTIs*Type</code>
+     * functions below, as well as <code>kPolyBlockNames</code> in
+     * publictypes.cpp. Used extensively by ColPartition, and POLY_BLOCK.
+     */
+    public static interface TessPolyBlockType {
+
+        /**
+         * Type is not yet known. Keep as the first element.
+         */
+        public static final int PT_UNKNOWN = 0;
+        /**
+         * Text that lives inside a column.
+         */
+        public static final int PT_FLOWING_TEXT = 1;
+        /**
+         * Text that spans more than one column.
+         */
+        public static final int PT_HEADING_TEXT = 2;
+        /**
+         * Text that is in a cross-column pull-out region.
+         */
+        public static final int PT_PULLOUT_TEXT = 3;
+        /**
+         * Partition belonging to an equation region.
+         */
+        public static final int PT_EQUATION = 4;
+        /**
+         * Partition has inline equation.
+         */
+        public static final int PT_INLINE_EQUATION = 5;
+        /**
+         * Partition belonging to a table region.
+         */
+        public static final int PT_TABLE = 6;
+        /**
+         * Text-line runs vertically.
+         */
+        public static final int PT_VERTICAL_TEXT = 7;
+        /**
+         * Text that belongs to an image.
+         */
+        public static final int PT_CAPTION_TEXT = 8;
+        /**
+         * Image that lives inside a column.
+         */
+        public static final int PT_FLOWING_IMAGE = 9;
+        /**
+         * Image that spans more than one column.
+         */
+        public static final int PT_HEADING_IMAGE = 10;
+        /**
+         * Image that is in a cross-column pull-out region.
+         */
+        public static final int PT_PULLOUT_IMAGE = 11;
+        /**
+         * Horizontal Line.
+         */
+        public static final int PT_HORZ_LINE = 12;
+        /**
+         * Vertical Line.
+         */
+        public static final int PT_VERT_LINE = 13;
+        /**
+         * Lies outside of any column.
+         */
+        public static final int PT_NOISE = 14;
+        /**
+         * Number of enum entries.
+         */
+        public static final int PT_COUNT = 15;
+    };
+
+    /**
+     * NOTA BENE: Fully justified paragraphs (text aligned to both left and
+     * right margins) are marked by Tesseract with JUSTIFICATION_LEFT if their
+     * text is written with a left-to-right script and with JUSTIFICATION_RIGHT
+     * if their text is written in a right-to-left script.<br>
+     * <br>
+     * Interpretation for text read in vertical lines: "Left" is wherever the
+     * starting reading position is.
+     */
+    public static interface TessParagraphJustification {
+
+        /**
+         * The alignment is not clearly one of the other options. This could
+         * happen for example if there are only one or two lines of text or the
+         * text looks like source code or poetry.
+         */
+        public static final int JUSTIFICATION_UNKNOWN = 0;
+        /**
+         * Each line, except possibly the first, is flush to the same left tab
+         * stop.
+         */
+        public static final int JUSTIFICATION_LEFT = 1;
+        /**
+         * The text lines of the paragraph are centered about a line going down
+         * through their middle of the text lines.
+         */
+        public static final int JUSTIFICATION_CENTER = 2;
+        /**
+         * Each line, except possibly the first, is flush to the same right tab
+         * stop.
+         */
+        public static final int JUSTIFICATION_RIGHT = 3;
+    }
+
+    /**
+     * <pre>
+     *  +------------------+
+     *  | 1 Aaaa Aaaa Aaaa |
+     *  | Aaa aa aaa aa    |
+     *  | aaaaaa A aa aaa. |
+     *  |                2 |
+     *  |   #######  c c C |
+     *  |   #######  c c c |
+     *  | &lt; #######  c c c |
+     *  | &lt; #######  c   c |
+     *  | &lt; #######  .   c |
+     *  | 3 #######      c |
+     *  +------------------+
+     * </pre> Orientation Example:
+     * <br>
+     * ====================
+     * <br>
+     * Above is a diagram of some (1) English and (2) Chinese text and a (3)
+     * photo credit.<br>
+     * <br>
+     * Upright Latin characters are represented as A and a. '&lt;' represents a
+     * latin character rotated anti-clockwise 90 degrees. Upright Chinese
+     * characters are represented C and c.<br>
+     * <br> NOTA BENE: enum values here should match goodoc.proto<br>
+     * <br> If you orient your head so that "up" aligns with Orientation, then
+     * the characters will appear "right side up" and readable.<br>
+     * <br>
+     * In the example above, both the English and Chinese paragraphs are
+     * oriented so their "up" is the top of the page (page up). The photo credit
+     * is read with one's head turned leftward ("up" is to page left).<br>
+     * <br>
+     * The values of this enum match the convention of Tesseract's osdetect.h
+     */
+    public static interface TessOrientation {
+
+        public static final int ORIENTATION_PAGE_UP = 0;
+        public static final int ORIENTATION_PAGE_RIGHT = 1;
+        public static final int ORIENTATION_PAGE_DOWN = 2;
+        public static final int ORIENTATION_PAGE_LEFT = 3;
+    };
+
+    /**
+     * The grapheme clusters within a line of text are laid out logically in
+     * this direction, judged when looking at the text line rotated so that its
+     * Orientation is "page up".<br>
+     * <br>
+     * For English text, the writing direction is left-to-right. For the Chinese
+     * text in the above example, the writing direction is top-to-bottom.
+     */
+    public static interface TessWritingDirection {
+
+        public static final int WRITING_DIRECTION_LEFT_TO_RIGHT = 0;
+        public static final int WRITING_DIRECTION_RIGHT_TO_LEFT = 1;
+        public static final int WRITING_DIRECTION_TOP_TO_BOTTOM = 2;
+    };
+
+    /**
+     * The text lines are read in the given sequence.<br>
+     * <br>
+     * In English, the order is top-to-bottom. In Chinese, vertical text lines
+     * are read right-to-left. Mongolian is written in vertical columns top to
+     * bottom like Chinese, but the lines order left-to right.<br>
+     * <br>
+     * Note that only some combinations make sense. For example,
+     * <code>WRITING_DIRECTION_LEFT_TO_RIGHT</code> implies
+     * <code>TEXTLINE_ORDER_TOP_TO_BOTTOM</code>.
+     */
+    public static interface TessTextlineOrder {
+
+        public static final int TEXTLINE_ORDER_LEFT_TO_RIGHT = 0;
+        public static final int TEXTLINE_ORDER_RIGHT_TO_LEFT = 1;
+        public static final int TEXTLINE_ORDER_TOP_TO_BOTTOM = 2;
+    };
+
+    public static final int TRUE = 1;
+    public static final int FALSE = 0;
+
+    /**
+     * Base class for all tesseract APIs. Specific classes can add ability to
+     * work on different inputs or produce different outputs. This class is
+     * mostly an interface layer on top of the Tesseract instance class to hide
+     * the data types so that users of this class don't have to include any
+     * other Tesseract headers.
+     */
+    public static class TessBaseAPI extends PointerType {
+
+        public TessBaseAPI(Pointer address) {
+            super(address);
+        }
+
+        public TessBaseAPI() {
+            super();
+        }
+    };
+
+    /**
+     * Class to iterate over tesseract page structure, providing access to all
+     * levels of the page hierarchy, without including any tesseract headers or
+     * having to handle any tesseract structures.<br>
+     * WARNING! This class points to data held within the TessBaseAPI class, and
+     * therefore can only be used while the TessBaseAPI class still exists and
+     * has not been subjected to a call of <code>Init</code>,
+     * <code>SetImage</code>, <code>Recognize</code>, <code>Clear</code>,
+     * <code>End</code> <code>DetectOS</code>, or anything else that changes the
+     * internal <code>PAGE_RES</code>. See <code>apitypes.h</code> for the
+     * definition of <code>PageIteratorLevel</code>. See also
+     * <code>ResultIterator</code>, derived from <code>PageIterator</code>,
+     * which adds in the ability to access OCR output with text-specific
+     * methods.
+     */
+    public static class TessPageIterator extends PointerType {
+
+        public TessPageIterator(Pointer address) {
+            super(address);
+        }
+
+        public TessPageIterator() {
+            super();
+        }
+    };
+
+    /**
+     * MutableIterator adds access to internal data structures.
+     */
+    public static class TessMutableIterator extends PointerType {
+
+        public TessMutableIterator(Pointer address) {
+            super(address);
+        }
+
+        public TessMutableIterator() {
+            super();
+        }
+    };
+
+    /**
+     * Iterator for tesseract results that is capable of iterating in proper
+     * reading order over Bi Directional (e.g. mixed Hebrew and English) text.
+     * ResultIterator adds text-specific methods for access to OCR output.
+     */
+    public static class TessResultIterator extends PointerType {
+
+        public TessResultIterator(Pointer address) {
+            super(address);
+        }
+
+        public TessResultIterator() {
+            super();
+        }
+    };
+
+    public static class TessChoiceIterator extends PointerType {
+
+        public TessChoiceIterator(Pointer address) {
+            super(address);
+        }
+
+        public TessChoiceIterator() {
+            super();
+        }
+    };
+
+    /**
+     * Interface for rendering tesseract results into a document, such as text,
+     * HOCR or pdf. This class is abstract. Specific classes handle individual
+     * formats. This interface is then used to inject the renderer class into
+     * tesseract when processing images.
+     *
+     * For simplicity implementing this with tesseract version 3.01, the
+     * renderer contains document state that is cleared from document to
+     * document just as the TessBaseAPI is. This way the base API can just
+     * delegate its rendering functionality to injected renderers, and the
+     * renderers can manage the associated state needed for the specific formats
+     * in addition to the heuristics for producing it.
+     */
+    public static class TessResultRenderer extends PointerType {
+
+        public TessResultRenderer(Pointer address) {
+            super(address);
+        }
+
+        public TessResultRenderer() {
+            super();
+        }
+    };
+
+    /**
+     * Description of the output of the OCR engine. This structure is used as
+     * both a progress monitor and the final output header, since it needs to be
+     * a valid progress monitor while the OCR engine is storing its output to
+     * shared memory. During progress, all the buffer info is -1. Progress
+     * starts at 0 and increases to 100 during OCR. No other constraint. Every
+     * progress callback, the OCR engine must set <code>ocr_alive</code> to 1.
+     * The HP side will set <code>ocr_alive</code> to 0. Repeated failure to
+     * reset to 1 indicates that the OCR engine is dead. If the cancel function
+     * is not null then it is called with the number of user words found. If it
+     * returns true then operation is cancelled.
+     */
+    public static class ETEXT_DESC extends Structure {
+
+        /**
+         * chars in this buffer(0). Total number of UTF-8 bytes for this run.
+         */
+        public short count;
+        /**
+         * percent complete increasing (0-100)
+         */
+        public short progress;
+        /**
+         * true if not last
+         */
+        public byte more_to_come;
+        /**
+         * ocr sets to 1, HP 0
+         */
+        public byte ocr_alive;
+        /**
+         * for errcode use
+         */
+        public byte err_code;
+        /**
+         * returns true to cancel
+         */
+        public CANCEL_FUNC cancel;
+        /**
+         * this or other data for cancel
+         */
+        public Pointer cancel_this;
+        /**
+         * time to stop if not 0
+         */
+        public TimeVal end_time;
+        /**
+         * character data
+         */
+        public EANYCODE_CHAR[] text = new EANYCODE_CHAR[1];
+
+        /**
+         * Gets Field Order.
+         *
+         * @return
+         */
+        @Override
+        protected List getFieldOrder() {
+            return Arrays.asList("count", "progress", "more_to_come", "ocr_alive", "err_code", "cancel", "cancel_this", "end_time", "text");
+        }
+    }
+
+    /**
+     * It should be noted that the format for char_code for version 2.0 and
+     * beyond is UTF-8, which means that ASCII characters will come out as one
+     * structure but other characters will be returned in two or more instances
+     * of this structure with a single byte of the UTF-8 code in each, but each
+     * will have the same bounding box.<br>
+     * <br>
+     * Programs which want to handle languages with different characters sets
+     * will need to handle extended characters appropriately, but
+     * <strong>all</strong>
+     * code needs to be prepared to receive UTF-8 coded characters for
+     * characters such as bullet and fancy quotes.
+     */
+    public static class EANYCODE_CHAR extends Structure {
+
+        /**
+         * character itself, one single UTF-8 byte long. A Unicode character may
+         * consist of one or more UTF-8 bytes. Bytes of a character will have
+         * the same bounding box.
+         */
+        public byte char_code;
+        /**
+         * left of char (-1)
+         */
+        public short left;
+        /**
+         * right of char (-1)
+         */
+        public short right;
+        /**
+         * top of char (-1)
+         */
+        public short top;
+        /**
+         * bottom of char (-1)
+         */
+        public short bottom;
+        /**
+         * what font (0)
+         */
+        public short font_index;
+        /**
+         * classification confidence: 0=perfect, 100=reject (0/100)
+         */
+        public byte confidence;
+        /**
+         * point size of char, 72 = 1 inch, (10)
+         */
+        public byte point_size;
+        /**
+         * number of spaces before this char (1)
+         */
+        public byte blanks;
+        /**
+         * char formatting (0)
+         */
+        public byte formatting;
+
+        /**
+         * Gets Field Order.
+         *
+         * @return
+         */
+        @Override
+        protected List getFieldOrder() {
+            return Arrays.asList("char_code", "left", "right", "top", "bottom", "font_index", "confidence", "point_size", "blanks", "formatting");
+        }
+    }
+
+    /**
+     * Callback for <code>cancel_func</code>.
+     */
+    interface CANCEL_FUNC extends Callback {
+
+        /**
+         *
+         * @param cancel_this
+         * @param words
+         * @return
+         */
+        boolean invoke(Pointer cancel_this, int words);
+    };
+
+    public static class TimeVal extends Structure {
+
+        /**
+         * seconds
+         */
+        public NativeLong tv_sec;
+        /**
+         * microseconds
+         */
+        public NativeLong tv_usec;
+
+        @Override
+        protected List<String> getFieldOrder() {
+            return Arrays.asList("tv_sec", "tv_usec");
+        }
+    }
+}

Tess4J/src/net/sourceforge/tess4j/ITesseract.java

@@ -0,0 +1,236 @@
+/**
+ * Copyright @ 2014 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import java.awt.Rectangle;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.nio.ByteBuffer;
+import java.util.List;
+import javax.imageio.IIOImage;
+
+/**
+ * An interface represents common OCR methods.
+ */
+public interface ITesseract {
+
+    String htmlBeginTag = "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\""
+            + " \"http://www.w3.org/TR/html4/loose.dtd\">\n"
+            + "<html>\n<head>\n<title></title>\n"
+            + "<meta http-equiv=\"Content-Type\" content=\"text/html;"
+            + "charset=utf-8\" />\n<meta name='ocr-system' content='tesseract'/>\n"
+            + "</head>\n<body>\n";
+    String htmlEndTag = "</body>\n</html>\n";
+
+    /**
+     * Rendered formats supported by Tesseract.
+     */
+    public enum RenderedFormat {
+
+        TEXT, HOCR, PDF, UNLV, BOX
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(File imageFile) throws TesseractException;
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(File imageFile, Rectangle rect) throws TesseractException;
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(BufferedImage bi) throws TesseractException;
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(BufferedImage bi, Rectangle rect) throws TesseractException;
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(List<IIOImage> imageList, Rectangle rect) throws TesseractException;
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param filename input file name. Needed only for training and reading a
+     * UNLV zone file.
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(List<IIOImage> imageList, String filename, Rectangle rect) throws TesseractException;
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) throws TesseractException;
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param filename input file name. Needed only for training and reading a
+     * UNLV zone file.
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    String doOCR(int xsize, int ysize, ByteBuffer buf, String filename, Rectangle rect, int bpp) throws TesseractException;
+
+    /**
+     * Sets tessdata path.
+     *
+     * @param datapath the tessdata path to set
+     */
+    void setDatapath(String datapath);
+
+    /**
+     * Sets language for OCR.
+     *
+     * @param language the language code, which follows ISO 639-3 standard.
+     */
+    void setLanguage(String language);
+
+    /**
+     * Sets OCR engine mode.
+     *
+     * @param ocrEngineMode the OcrEngineMode to set
+     */
+    void setOcrEngineMode(int ocrEngineMode);
+
+    /**
+     * Sets page segmentation mode.
+     *
+     * @param mode the page segmentation mode to set
+     */
+    void setPageSegMode(int mode);
+
+    /**
+     * Sets the value of Tesseract's internal parameter.
+     *
+     * @param key variable name, e.g., <code>tessedit_create_hocr</code>,
+     * <code>tessedit_char_whitelist</code>, etc.
+     * @param value value for corresponding variable, e.g., "1", "0",
+     * "0123456789", etc.
+     */
+    void setTessVariable(String key, String value);
+
+    /**
+     * Sets configs to be passed to Tesseract's <code>Init</code> method.
+     *
+     * @param configs list of config filenames, e.g., "digits", "bazaar",
+     * "quiet"
+     */
+    void setConfigs(List<String> configs);
+
+    /**
+     * Creates documents for given renderers.
+     *
+     * @param filename input image
+     * @param outputbase output filename without extension
+     * @param formats types of renderers
+     * @throws TesseractException
+     */
+    void createDocuments(String filename, String outputbase, List<RenderedFormat> formats) throws TesseractException;
+
+    /**
+     * Creates documents for given renderers.
+     *
+     * @param filenames array of input files
+     * @param outputbases array of output filenames without extension
+     * @param formats types of renderers
+     * @throws TesseractException
+     */
+    void createDocuments(String[] filenames, String[] outputbases, List<RenderedFormat> formats) throws TesseractException;
+
+    /**
+     * Gets segmented regions at specified page iterator level.
+     *
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Rectangle</code>
+     * @throws TesseractException
+     */
+    List<Rectangle> getSegmentedRegions(BufferedImage bi, int pageIteratorLevel) throws TesseractException;
+    
+    /**
+     * Gets recognized words at specified page iterator level.
+     * 
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Word</code>
+     */
+    List<Word> getWords(BufferedImage bi, int pageIteratorLevel);
+}

Tess4J/src/net/sourceforge/tess4j/Tesseract.java

@@ -0,0 +1,682 @@
+/**
+ * Copyright @ 2012 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import com.sun.jna.Pointer;
+import com.sun.jna.StringArray;
+import com.sun.jna.ptr.PointerByReference;
+import java.awt.Rectangle;
+import java.awt.image.*;
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.*;
+import javax.imageio.IIOImage;
+import net.sourceforge.lept4j.Box;
+import net.sourceforge.lept4j.Boxa;
+import static net.sourceforge.lept4j.ILeptonica.L_CLONE;
+import net.sourceforge.lept4j.Leptonica;
+import static net.sourceforge.tess4j.ITessAPI.TRUE;
+
+import net.sourceforge.tess4j.ITessAPI.TessBaseAPI;
+import net.sourceforge.tess4j.ITessAPI.TessOcrEngineMode;
+import net.sourceforge.tess4j.ITessAPI.TessPageIterator;
+import net.sourceforge.tess4j.ITessAPI.TessResultIterator;
+import net.sourceforge.tess4j.ITessAPI.TessResultRenderer;
+
+import net.sourceforge.tess4j.util.ImageIOHelper;
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.PdfUtilities;
+import org.slf4j.*;
+
+/**
+ * An object layer on top of <code>TessAPI</code>, provides character
+ * recognition support for common image formats, and multi-page TIFF images
+ * beyond the uncompressed, binary TIFF format supported by Tesseract OCR
+ * engine. The extended capabilities are provided by the
+ * <code>Java Advanced Imaging Image I/O Tools</code>.<br>
+ * <br>
+ * Support for PDF documents is available through <code>Ghost4J</code>, a
+ * <code>JNA</code> wrapper for <code>GPL Ghostscript</code>, which should be
+ * installed and included in system path.<br>
+ * <br>
+ * Any program that uses the library will need to ensure that the required
+ * libraries (the <code>.jar</code> files for <code>jna</code>,
+ * <code>jai-imageio</code>, and <code>ghost4j</code>) are in its compile and
+ * run-time <code>classpath</code>.
+ */
+public class Tesseract implements ITesseract {
+
+    private static Tesseract instance;
+    private String language = "eng";
+    private String datapath;
+    private RenderedFormat renderedFormat = RenderedFormat.TEXT;
+    private int psm = -1;
+    private int ocrEngineMode = TessOcrEngineMode.OEM_DEFAULT;
+    private final Properties prop = new Properties();
+    private final List<String> configList = new ArrayList<String>();
+
+    private TessAPI api;
+    private TessBaseAPI handle;
+
+    private static final org.slf4j.Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    
+    public Tesseract() {
+        try {
+            datapath = System.getenv("TESSDATA_PREFIX");
+        } catch (Exception e) {
+            // ignore
+        } finally {
+            if (datapath == null) {
+                datapath = "./";
+            }
+        }
+    }
+
+    /**
+     * Returns TessAPI object.
+     *
+     * @return api
+     */
+    protected TessAPI getAPI() {
+        return api;
+    }
+
+    /**
+     * Returns API handle.
+     *
+     * @return handle
+     */
+    protected TessBaseAPI getHandle() {
+        return handle;
+    }
+
+    /**
+     * Gets an instance of the class library.
+     *
+     * @deprecated As of Release 2.0, use default constructor instead.
+     * @return instance
+     */
+    @Deprecated
+    public static synchronized Tesseract getInstance() {
+        if (instance == null) {
+            instance = new Tesseract();
+        }
+
+        return instance;
+    }
+
+    /**
+     * Sets path to <code>tessdata</code>.
+     *
+     * @param datapath the tessdata path to set
+     */
+    @Override
+    public void setDatapath(String datapath) {
+        this.datapath = datapath;
+    }
+
+    /**
+     * Sets language for OCR.
+     *
+     * @param language the language code, which follows ISO 639-3 standard.
+     */
+    @Override
+    public void setLanguage(String language) {
+        this.language = language;
+    }
+
+    /**
+     * Sets OCR engine mode.
+     *
+     * @param ocrEngineMode the OcrEngineMode to set
+     */
+    @Override
+    public void setOcrEngineMode(int ocrEngineMode) {
+        this.ocrEngineMode = ocrEngineMode;
+    }
+
+    /**
+     * Sets page segmentation mode.
+     *
+     * @param mode the page segmentation mode to set
+     */
+    @Override
+    public void setPageSegMode(int mode) {
+        this.psm = mode;
+    }
+
+    /**
+     * Enables hocr output.
+     *
+     * @param hocr to enable or disable hocr output
+     */
+    public void setHocr(boolean hocr) {
+        this.renderedFormat = hocr ? RenderedFormat.HOCR : RenderedFormat.TEXT;
+        prop.setProperty("tessedit_create_hocr", hocr ? "1" : "0");
+    }
+
+    /**
+     * Set the value of Tesseract's internal parameter.
+     *
+     * @param key variable name, e.g., <code>tessedit_create_hocr</code>,
+     * <code>tessedit_char_whitelist</code>, etc.
+     * @param value value for corresponding variable, e.g., "1", "0",
+     * "0123456789", etc.
+     */
+    @Override
+    public void setTessVariable(String key, String value) {
+        prop.setProperty(key, value);
+    }
+
+    /**
+     * Sets configs to be passed to Tesseract's <code>Init</code> method.
+     *
+     * @param configs list of config filenames, e.g., "digits", "bazaar",
+     * "quiet"
+     */
+    @Override
+    public void setConfigs(List<String> configs) {
+        configList.clear();
+        if (configs != null) {
+            configList.addAll(configs);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(File imageFile) throws TesseractException {
+        return doOCR(imageFile, null);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(File imageFile, Rectangle rect) throws TesseractException {
+        try {
+            return doOCR(ImageIOHelper.getIIOImageList(imageFile), imageFile.getPath(), rect);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(BufferedImage bi) throws TesseractException {
+        return doOCR(bi, null);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(BufferedImage bi, Rectangle rect) throws TesseractException {
+        try {
+            return doOCR(ImageIOHelper.getIIOImageList(bi), rect);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(List<IIOImage> imageList, Rectangle rect) throws TesseractException {
+        return doOCR(imageList, null, rect);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param filename input file name. Needed only for training and reading a
+     * UNLV zone file.
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(List<IIOImage> imageList, String filename, Rectangle rect) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            StringBuilder sb = new StringBuilder();
+            int pageNum = 0;
+
+            for (IIOImage oimage : imageList) {
+                pageNum++;
+                try {
+                    setImage(oimage.getRenderedImage(), rect);
+                    sb.append(getOCRText(filename, pageNum));
+                } catch (IOException ioe) {
+                    // skip the problematic image
+                    logger.error(ioe.getMessage(), ioe);
+                }
+            }
+
+            if (renderedFormat == RenderedFormat.HOCR) {
+                sb.insert(0, htmlBeginTag).append(htmlEndTag);
+            }
+
+            return sb.toString();
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) throws TesseractException {
+        return doOCR(xsize, ysize, buf, null, rect, bpp);
+    }
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param filename input file name. Needed only for training and reading a
+     * UNLV zone file.
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(int xsize, int ysize, ByteBuffer buf, String filename, Rectangle rect, int bpp) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            setImage(xsize, ysize, buf, rect, bpp);
+            return getOCRText(filename, 1);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Initializes Tesseract engine.
+     */
+    protected void init() {
+        api = TessAPI.INSTANCE;
+        handle = api.TessBaseAPICreate();
+        StringArray sarray = new StringArray(configList.toArray(new String[0]));
+        PointerByReference configs = new PointerByReference();
+        configs.setPointer(sarray);
+        api.TessBaseAPIInit1(handle, datapath, language, ocrEngineMode, configs, configList.size());
+        if (psm > -1) {
+            api.TessBaseAPISetPageSegMode(handle, psm);
+        }
+    }
+
+    /**
+     * Sets Tesseract's internal parameters.
+     */
+    protected void setTessVariables() {
+        Enumeration<?> em = prop.propertyNames();
+        while (em.hasMoreElements()) {
+            String key = (String) em.nextElement();
+            api.TessBaseAPISetVariable(handle, key, prop.getProperty(key));
+        }
+    }
+
+    /**
+     * A wrapper for {@link #setImage(int, int, ByteBuffer, Rectangle, int)}.
+     *
+     * @param image a rendered image
+     * @param rect region of interest
+     * @throws java.io.IOException
+     */
+    protected void setImage(RenderedImage image, Rectangle rect) throws IOException {
+        setImage(image.getWidth(), image.getHeight(), ImageIOHelper.getImageByteBuffer(image), rect, image
+                .getColorModel().getPixelSize());
+    }
+
+    /**
+     * Sets image to be processed.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     */
+    protected void setImage(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) {
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(xsize * bpp / 8.0);
+        api.TessBaseAPISetImage(handle, buf, xsize, ysize, bytespp, bytespl);
+
+        if (rect != null && !rect.isEmpty()) {
+            api.TessBaseAPISetRectangle(handle, rect.x, rect.y, rect.width, rect.height);
+        }
+    }
+
+    /**
+     * Gets recognized text.
+     *
+     * @param filename input file name. Needed only for reading a UNLV zone
+     * file.
+     * @param pageNum page number; needed for hocr paging.
+     * @return the recognized text
+     */
+    protected String getOCRText(String filename, int pageNum) {
+        if (filename != null && !filename.isEmpty()) {
+            api.TessBaseAPISetInputName(handle, filename);
+        }
+
+        Pointer utf8Text = renderedFormat == RenderedFormat.HOCR ? api.TessBaseAPIGetHOCRText(handle, pageNum - 1) : api.TessBaseAPIGetUTF8Text(handle);
+        String str = utf8Text.getString(0);
+        api.TessDeleteText(utf8Text);
+        return str;
+    }
+
+    /**
+     * Creates renderers for given formats.
+     *
+     * @param outputbase
+     * @param formats
+     * @return
+     */
+    private TessResultRenderer createRenderers(String outputbase, List<RenderedFormat> formats) {
+        TessResultRenderer renderer = null;
+
+        for (RenderedFormat format : formats) {
+            switch (format) {
+                case TEXT:
+                    if (renderer == null) {
+                        renderer = api.TessTextRendererCreate(outputbase);
+                    } else {
+                        api.TessResultRendererInsert(renderer, api.TessTextRendererCreate(outputbase));
+                    }
+                    break;
+                case HOCR:
+                    if (renderer == null) {
+                        renderer = api.TessHOcrRendererCreate(outputbase);
+                    } else {
+                        api.TessResultRendererInsert(renderer, api.TessHOcrRendererCreate(outputbase));
+                    }
+                    break;
+                case PDF:
+                    String dataPath = api.TessBaseAPIGetDatapath(handle);
+                    if (renderer == null) {
+                        renderer = api.TessPDFRendererCreate(outputbase, dataPath);
+                    } else {
+                        api.TessResultRendererInsert(renderer, api.TessPDFRendererCreate(outputbase, dataPath));
+                    }
+                    break;
+                case BOX:
+                    if (renderer == null) {
+                        renderer = api.TessBoxTextRendererCreate(outputbase);
+                    } else {
+                        api.TessResultRendererInsert(renderer, api.TessBoxTextRendererCreate(outputbase));
+                    }
+                    break;
+                case UNLV:
+                    if (renderer == null) {
+                        renderer = api.TessUnlvRendererCreate(outputbase);
+                    } else {
+                        api.TessResultRendererInsert(renderer, api.TessUnlvRendererCreate(outputbase));
+                    }
+                    break;
+            }
+        }
+
+        return renderer;
+    }
+
+    /**
+     * Creates documents for given renderer.
+     *
+     * @param filename input image
+     * @param outputbase output filename without extension
+     * @param formats types of renderer
+     * @throws TesseractException
+     */
+    @Override
+    public void createDocuments(String filename, String outputbase, List<RenderedFormat> formats) throws TesseractException {
+        createDocuments(new String[]{filename}, new String[]{outputbase}, formats);
+    }
+
+    /**
+     * Creates documents.
+     *
+     * @param filenames array of input files
+     * @param outputbases array of output filenames without extension
+     * @param formats types of renderer
+     * @throws TesseractException
+     */
+    @Override
+    public void createDocuments(String[] filenames, String[] outputbases, List<RenderedFormat> formats) throws TesseractException {
+        if (filenames.length != outputbases.length) {
+            throw new RuntimeException("The two arrays must match in length.");
+        }
+
+        init();
+        setTessVariables();
+
+        try {
+            for (int i = 0; i < filenames.length; i++) {
+                File workingTiffFile = null;
+                try {
+                    String filename = filenames[i];
+
+                    // if PDF, convert to multi-page TIFF
+                    if (filename.toLowerCase().endsWith(".pdf")) {
+                        workingTiffFile = PdfUtilities.convertPdf2Tiff(new File(filename));
+                        filename = workingTiffFile.getPath();
+                    }
+
+                    TessResultRenderer renderer = createRenderers(outputbases[i], formats);
+                    createDocuments(filename, renderer);
+                    api.TessDeleteResultRenderer(renderer);
+                } catch (Exception e) {
+                    // skip the problematic image file
+                    logger.error(e.getMessage(), e);
+                } finally {
+                    if (workingTiffFile != null && workingTiffFile.exists()) {
+                        workingTiffFile.delete();
+                    }
+                }
+            }
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Creates documents.
+     *
+     * @param filename input file
+     * @param renderer renderer
+     * @throws TesseractException
+     */
+    private void createDocuments(String filename, TessResultRenderer renderer) throws TesseractException {
+        api.TessBaseAPISetInputName(handle, filename); //for reading a UNLV zone file
+        int result = api.TessBaseAPIProcessPages(handle, filename, null, 0, renderer);
+
+        if (result == ITessAPI.FALSE) {
+            throw new TesseractException("Error during processing page.");
+        }
+    }
+
+    /**
+     * Gets segmented regions at specified page iterator level.
+     *
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Rectangle</code>
+     * @throws TesseractException
+     */
+    @Override
+    public List<Rectangle> getSegmentedRegions(BufferedImage bi, int pageIteratorLevel) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            List<Rectangle> list = new ArrayList<Rectangle>();
+            setImage(bi, null);
+
+            Boxa boxes = api.TessBaseAPIGetComponentImages(handle, pageIteratorLevel, TRUE, null, null);
+            Leptonica leptInstance = Leptonica.INSTANCE;
+            int boxCount = leptInstance.boxaGetCount(boxes);
+            for (int i = 0; i < boxCount; i++) {
+                Box box = leptInstance.boxaGetBox(boxes, i, L_CLONE);
+                if (box == null) {
+                    continue;
+                }
+                list.add(new Rectangle(box.x, box.y, box.w, box.h));
+                PointerByReference pRef = new PointerByReference();
+                pRef.setValue(box.getPointer());
+                leptInstance.boxDestroy(pRef);
+            }
+
+            PointerByReference pRef = new PointerByReference();
+            pRef.setValue(boxes.getPointer());
+            leptInstance.boxaDestroy(pRef);
+
+            return list;
+        } catch (IOException ioe) {
+            // skip the problematic image
+            logger.error(ioe.getMessage(), ioe);
+            throw new TesseractException(ioe);
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Gets recognized words at specified page iterator level.
+     *
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Word</code>
+     */
+    @Override
+    public List<Word> getWords(BufferedImage bi, int pageIteratorLevel) {
+        this.init();
+        this.setTessVariables();
+
+        List<Word> words = new ArrayList<Word>();
+
+        try {
+            setImage(bi, null);
+
+            api.TessBaseAPIRecognize(handle, null);
+            TessResultIterator ri = api.TessBaseAPIGetIterator(handle);
+            TessPageIterator pi = api.TessResultIteratorGetPageIterator(ri);
+            api.TessPageIteratorBegin(pi);
+
+            do {
+                Pointer ptr = api.TessResultIteratorGetUTF8Text(ri, pageIteratorLevel);
+                String text = ptr.getString(0);
+                api.TessDeleteText(ptr);
+                float confidence = api.TessResultIteratorConfidence(ri, pageIteratorLevel);
+                IntBuffer leftB = IntBuffer.allocate(1);
+                IntBuffer topB = IntBuffer.allocate(1);
+                IntBuffer rightB = IntBuffer.allocate(1);
+                IntBuffer bottomB = IntBuffer.allocate(1);
+                api.TessPageIteratorBoundingBox(pi, pageIteratorLevel, leftB, topB, rightB, bottomB);
+                int left = leftB.get();
+                int top = topB.get();
+                int right = rightB.get();
+                int bottom = bottomB.get();
+                Word word = new Word(text, confidence, new Rectangle(left, top, right - left, bottom - top));
+                words.add(word);
+            } while (api.TessPageIteratorNext(pi, pageIteratorLevel) == TRUE);
+
+            return words;
+        } catch (Exception e) {
+            return words;
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Releases all of the native resources used by this instance.
+     */
+    protected void dispose() {
+        api.TessBaseAPIDelete(handle);
+    }
+}

Tess4J/src/net/sourceforge/tess4j/Tesseract1.java

@@ -0,0 +1,647 @@
+/**
+ * Copyright @ 2012 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import com.sun.jna.Pointer;
+import com.sun.jna.StringArray;
+import com.sun.jna.ptr.PointerByReference;
+import java.awt.Rectangle;
+import java.awt.image.*;
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.*;
+import javax.imageio.IIOImage;
+import net.sourceforge.lept4j.Box;
+import net.sourceforge.lept4j.Boxa;
+import static net.sourceforge.lept4j.ILeptonica.L_CLONE;
+import net.sourceforge.lept4j.Leptonica1;
+import static net.sourceforge.tess4j.ITessAPI.TRUE;
+
+import net.sourceforge.tess4j.util.ImageIOHelper;
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.PdfUtilities;
+import org.slf4j.*;
+
+/**
+ * An object layer on top of <code>TessAPI1</code>, provides character
+ * recognition support for common image formats, and multi-page TIFF images
+ * beyond the uncompressed, binary TIFF format supported by Tesseract OCR
+ * engine. The extended capabilities are provided by the
+ * <code>Java Advanced Imaging Image I/O Tools</code>.<br>
+ * <br>
+ * Support for PDF documents is available through <code>Ghost4J</code>, a
+ * <code>JNA</code> wrapper for <code>GPL Ghostscript</code>, which should be
+ * installed and included in system path.<br>
+ * <br>
+ * Any program that uses the library will need to ensure that the required
+ * libraries (the <code>.jar</code> files for <code>jna</code>,
+ * <code>jai-imageio</code>, and <code>ghost4j</code>) are in its compile and
+ * run-time <code>classpath</code>.
+ */
+public class Tesseract1 extends TessAPI1 implements ITesseract {
+
+    private String language = "eng";
+    private String datapath;
+    private RenderedFormat renderedFormat = RenderedFormat.TEXT;
+    private int psm = -1;
+    private int ocrEngineMode = TessOcrEngineMode.OEM_DEFAULT;
+    private final Properties prop = new Properties();
+    private final List<String> configList = new ArrayList<String>();
+
+    private TessBaseAPI handle;
+
+    private static final org.slf4j.Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    public Tesseract1() {
+        try {
+            datapath = System.getenv("TESSDATA_PREFIX");
+        } catch (Exception e) {
+            // ignore
+        } finally {
+            if (datapath == null) {
+                datapath = "./";
+            }
+        }
+    }
+
+    /**
+     * Returns API handle.
+     *
+     * @return handle
+     */
+    protected TessBaseAPI getHandle() {
+        return handle;
+    }
+
+    /**
+     * Sets path to <code>tessdata</code>.
+     *
+     * @param datapath the tessdata path to set
+     */
+    @Override
+    public void setDatapath(String datapath) {
+        this.datapath = datapath;
+    }
+
+    /**
+     * Sets language for OCR.
+     *
+     * @param language the language code, which follows ISO 639-3 standard.
+     */
+    @Override
+    public void setLanguage(String language) {
+        this.language = language;
+    }
+
+    /**
+     * Sets OCR engine mode.
+     *
+     * @param ocrEngineMode the OcrEngineMode to set
+     */
+    @Override
+    public void setOcrEngineMode(int ocrEngineMode) {
+        this.ocrEngineMode = ocrEngineMode;
+    }
+
+    /**
+     * Sets page segmentation mode.
+     *
+     * @param mode the page segmentation mode to set
+     */
+    @Override
+    public void setPageSegMode(int mode) {
+        this.psm = mode;
+    }
+
+    /**
+     * Enables hocr output.
+     *
+     * @param hocr to enable or disable hocr output
+     */
+    public void setHocr(boolean hocr) {
+        this.renderedFormat = hocr ? RenderedFormat.HOCR : RenderedFormat.TEXT;
+        prop.setProperty("tessedit_create_hocr", hocr ? "1" : "0");
+    }
+
+    /**
+     * Set the value of Tesseract's internal parameter.
+     *
+     * @param key variable name, e.g., <code>tessedit_create_hocr</code>,
+     * <code>tessedit_char_whitelist</code>, etc.
+     * @param value value for corresponding variable, e.g., "1", "0",
+     * "0123456789", etc.
+     */
+    @Override
+    public void setTessVariable(String key, String value) {
+        prop.setProperty(key, value);
+    }
+
+    /**
+     * Sets configs to be passed to Tesseract's <code>Init</code> method.
+     *
+     * @param configs list of config filenames, e.g., "digits", "bazaar",
+     * "quiet"
+     */
+    @Override
+    public void setConfigs(List<String> configs) {
+        configList.clear();
+        if (configs != null) {
+            configList.addAll(configs);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(File imageFile) throws TesseractException {
+        return doOCR(imageFile, null);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageFile an image file
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(File imageFile, Rectangle rect) throws TesseractException {
+        try {
+            return doOCR(ImageIOHelper.getIIOImageList(imageFile), imageFile.getPath(), rect);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(BufferedImage bi) throws TesseractException {
+        return doOCR(bi, null);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param bi a buffered image
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(BufferedImage bi, Rectangle rect) throws TesseractException {
+        try {
+            return doOCR(ImageIOHelper.getIIOImageList(bi), rect);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        }
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(List<IIOImage> imageList, Rectangle rect) throws TesseractException {
+        return doOCR(imageList, null, rect);
+    }
+
+    /**
+     * Performs OCR operation.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param filename input file name
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(List<IIOImage> imageList, String filename, Rectangle rect) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            StringBuilder sb = new StringBuilder();
+            int pageNum = 0;
+
+            for (IIOImage oimage : imageList) {
+                pageNum++;
+                try {
+                    setImage(oimage.getRenderedImage(), rect);
+                    sb.append(getOCRText(filename, pageNum));
+                } catch (IOException ioe) {
+                    // skip the problematic image
+                    logger.error(ioe.getMessage(), ioe);
+                }
+            }
+
+            if (renderedFormat == RenderedFormat.HOCR) {
+                sb.insert(0, htmlBeginTag).append(htmlEndTag);
+            }
+
+            return sb.toString();
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) throws TesseractException {
+        return doOCR(xsize, ysize, buf, null, rect, bpp);
+    }
+
+    /**
+     * Performs OCR operation. Use <code>SetImage</code>, (optionally)
+     * <code>SetRectangle</code>, and one or more of the <code>Get*Text</code>
+     * functions.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param filename input file name. Needed only for training and reading a
+     * UNLV zone file.
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     * @return the recognized text
+     * @throws TesseractException
+     */
+    @Override
+    public String doOCR(int xsize, int ysize, ByteBuffer buf, String filename, Rectangle rect, int bpp) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            setImage(xsize, ysize, buf, rect, bpp);
+            return getOCRText(filename, 1);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new TesseractException(e);
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Initializes Tesseract engine.
+     */
+    protected void init() {
+        handle = TessBaseAPICreate();
+        StringArray sarray = new StringArray(configList.toArray(new String[0]));
+        PointerByReference configs = new PointerByReference();
+        configs.setPointer(sarray);
+        TessBaseAPIInit1(handle, datapath, language, ocrEngineMode, configs, configList.size());
+        if (psm > -1) {
+            TessBaseAPISetPageSegMode(handle, psm);
+        }
+    }
+
+    /**
+     * Sets Tesseract's internal parameters.
+     */
+    protected void setTessVariables() {
+        Enumeration<?> em = prop.propertyNames();
+        while (em.hasMoreElements()) {
+            String key = (String) em.nextElement();
+            TessBaseAPISetVariable(handle, key, prop.getProperty(key));
+        }
+    }
+
+    /**
+     * A wrapper for {@link #setImage(int, int, ByteBuffer, Rectangle, int)}.
+     *
+     * @param image a rendered image
+     * @param rect region of interest
+     * @throws java.io.IOException
+     */
+    protected void setImage(RenderedImage image, Rectangle rect) throws IOException {
+        setImage(image.getWidth(), image.getHeight(), ImageIOHelper.getImageByteBuffer(image), rect, image
+                .getColorModel().getPixelSize());
+    }
+
+    /**
+     * Sets image to be processed.
+     *
+     * @param xsize width of image
+     * @param ysize height of image
+     * @param buf pixel data
+     * @param rect the bounding rectangle defines the region of the image to be
+     * recognized. A rectangle of zero dimension or <code>null</code> indicates
+     * the whole image.
+     * @param bpp bits per pixel, represents the bit depth of the image, with 1
+     * for binary bitmap, 8 for gray, and 24 for color RGB.
+     */
+    protected void setImage(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) {
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(xsize * bpp / 8.0);
+        TessBaseAPISetImage(handle, buf, xsize, ysize, bytespp, bytespl);
+
+        if (rect != null && !rect.isEmpty()) {
+            TessBaseAPISetRectangle(handle, rect.x, rect.y, rect.width, rect.height);
+        }
+    }
+
+    /**
+     * Gets recognized text.
+     *
+     * @param filename input file name. Needed only for reading a UNLV zone
+     * file.
+     * @param pageNum page number; needed for hocr paging.
+     * @return the recognized text
+     */
+    protected String getOCRText(String filename, int pageNum) {
+        if (filename != null && !filename.isEmpty()) {
+            TessBaseAPISetInputName(handle, filename);
+        }
+
+        Pointer utf8Text = renderedFormat == RenderedFormat.HOCR ? TessBaseAPIGetHOCRText(handle, pageNum - 1) : TessBaseAPIGetUTF8Text(handle);
+        String str = utf8Text.getString(0);
+        TessDeleteText(utf8Text);
+        return str;
+    }
+
+    /**
+     * Creates renderers for given formats.
+     *
+     * @param outputbase
+     * @param formats
+     * @return
+     */
+    private TessResultRenderer createRenderers(String outputbase, List<RenderedFormat> formats) {
+        TessResultRenderer renderer = null;
+
+        for (RenderedFormat format : formats) {
+            switch (format) {
+                case TEXT:
+                    if (renderer == null) {
+                        renderer = TessTextRendererCreate(outputbase);
+                    } else {
+                        TessResultRendererInsert(renderer, TessTextRendererCreate(outputbase));
+                    }
+                    break;
+                case HOCR:
+                    if (renderer == null) {
+                        renderer = TessHOcrRendererCreate(outputbase);
+                    } else {
+                        TessResultRendererInsert(renderer, TessHOcrRendererCreate(outputbase));
+                    }
+                    break;
+                case PDF:
+                    String dataPath = TessBaseAPIGetDatapath(handle);
+                    if (renderer == null) {
+                        renderer = TessPDFRendererCreate(outputbase, dataPath);
+                    } else {
+                        TessResultRendererInsert(renderer, TessPDFRendererCreate(outputbase, dataPath));
+                    }
+                    break;
+                case BOX:
+                    if (renderer == null) {
+                        renderer = TessBoxTextRendererCreate(outputbase);
+                    } else {
+                        TessResultRendererInsert(renderer, TessBoxTextRendererCreate(outputbase));
+                    }
+                    break;
+                case UNLV:
+                    if (renderer == null) {
+                        renderer = TessUnlvRendererCreate(outputbase);
+                    } else {
+                        TessResultRendererInsert(renderer, TessUnlvRendererCreate(outputbase));
+                    }
+                    break;
+            }
+        }
+
+        return renderer;
+    }
+
+    /**
+     * Creates documents for given renderer.
+     *
+     * @param filename input image
+     * @param outputbase output filename without extension
+     * @param formats types of renderer
+     * @throws TesseractException
+     */
+    @Override
+    public void createDocuments(String filename, String outputbase, List<RenderedFormat> formats) throws TesseractException {
+        createDocuments(new String[]{filename}, new String[]{outputbase}, formats);
+    }
+
+    /**
+     * Creates documents.
+     *
+     * @param filenames array of input files
+     * @param outputbases array of output filenames without extension
+     * @param formats types of renderer
+     * @throws TesseractException
+     */
+    @Override
+    public void createDocuments(String[] filenames, String[] outputbases, List<RenderedFormat> formats) throws TesseractException {
+        if (filenames.length != outputbases.length) {
+            throw new RuntimeException("The two arrays must match in length.");
+        }
+
+        init();
+        setTessVariables();
+
+        try {
+            for (int i = 0; i < filenames.length; i++) {
+                File workingTiffFile = null;
+                try {
+                    String filename = filenames[i];
+
+                    // if PDF, convert to multi-page TIFF
+                    if (filename.toLowerCase().endsWith(".pdf")) {
+                        workingTiffFile = PdfUtilities.convertPdf2Tiff(new File(filename));
+                        filename = workingTiffFile.getPath();
+                    }
+
+                    TessResultRenderer renderer = createRenderers(outputbases[i], formats);
+                    createDocuments(filename, renderer);
+                    TessDeleteResultRenderer(renderer);
+                } catch (Exception e) {
+                    // skip the problematic image file
+                    logger.error(e.getMessage(), e);
+                } finally {
+                    if (workingTiffFile != null && workingTiffFile.exists()) {
+                        workingTiffFile.delete();
+                    }
+                }
+            }
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Creates documents.
+     *
+     * @param filename input file
+     * @param renderer renderer
+     * @throws TesseractException
+     */
+    private void createDocuments(String filename, TessResultRenderer renderer) throws TesseractException {
+        TessBaseAPISetInputName(handle, filename); //for reading a UNLV zone file
+        int result = TessBaseAPIProcessPages(handle, filename, null, 0, renderer);
+
+//        if (result == ITessAPI.FALSE) {
+//            throw new TesseractException("Error during processing page.");
+//        }
+    }
+
+    /**
+     * Gets segmented regions at specified page iterator level.
+     *
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Rectangle</code>
+     * @throws TesseractException
+     */
+    @Override
+    public List<Rectangle> getSegmentedRegions(BufferedImage bi, int pageIteratorLevel) throws TesseractException {
+        init();
+        setTessVariables();
+
+        try {
+            List<Rectangle> list = new ArrayList<Rectangle>();
+            setImage(bi, null);
+
+            Boxa boxes = TessBaseAPIGetComponentImages(handle, pageIteratorLevel, TRUE, null, null);
+            int boxCount = Leptonica1.boxaGetCount(boxes);
+            for (int i = 0; i < boxCount; i++) {
+                Box box = Leptonica1.boxaGetBox(boxes, i, L_CLONE);
+                if (box == null) {
+                    continue;
+                }
+                list.add(new Rectangle(box.x, box.y, box.w, box.h));
+                PointerByReference pRef = new PointerByReference();
+                pRef.setValue(box.getPointer());
+                Leptonica1.boxDestroy(pRef);
+            }
+
+            PointerByReference pRef = new PointerByReference();
+            pRef.setValue(boxes.getPointer());
+            Leptonica1.boxaDestroy(pRef);
+
+            return list;
+        } catch (IOException ioe) {
+            // skip the problematic image
+            logger.error(ioe.getMessage(), ioe);
+            throw new TesseractException(ioe);
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Gets recognized words at specified page iterator level.
+     *
+     * @param bi input image
+     * @param pageIteratorLevel TessPageIteratorLevel enum
+     * @return list of <code>Word</code>
+     */
+    @Override
+    public List<Word> getWords(BufferedImage bi, int pageIteratorLevel) {
+        this.init();
+        this.setTessVariables();
+
+        List<Word> words = new ArrayList<Word>();
+
+        try {
+            setImage(bi, null);
+
+            TessBaseAPIRecognize(handle, null);
+            TessResultIterator ri = TessBaseAPIGetIterator(handle);
+            TessPageIterator pi = TessResultIteratorGetPageIterator(ri);
+            TessPageIteratorBegin(pi);
+
+            do {
+                Pointer ptr = TessResultIteratorGetUTF8Text(ri, pageIteratorLevel);
+                String text = ptr.getString(0);
+                TessAPI1.TessDeleteText(ptr);
+                float confidence = TessResultIteratorConfidence(ri, pageIteratorLevel);
+                IntBuffer leftB = IntBuffer.allocate(1);
+                IntBuffer topB = IntBuffer.allocate(1);
+                IntBuffer rightB = IntBuffer.allocate(1);
+                IntBuffer bottomB = IntBuffer.allocate(1);
+                TessPageIteratorBoundingBox(pi, pageIteratorLevel, leftB, topB, rightB, bottomB);
+                int left = leftB.get();
+                int top = topB.get();
+                int right = rightB.get();
+                int bottom = bottomB.get();
+                Word word = new Word(text, confidence, new Rectangle(left, top, right - left, bottom - top));
+                words.add(word);
+            } while (TessPageIteratorNext(pi, pageIteratorLevel) == TRUE);
+
+            return words;
+        } catch (Exception e) {
+            return words;
+        } finally {
+            dispose();
+        }
+    }
+
+    /**
+     * Releases all of the native resources used by this instance.
+     */
+    protected void dispose() {
+        TessBaseAPIDelete(handle);
+    }
+}

Tess4J/src/net/sourceforge/tess4j/TesseractException.java

@@ -0,0 +1,35 @@
+/**
+ * Copyright @ 2010 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+public class TesseractException extends Exception {
+
+    public TesseractException() {
+        super();
+    }
+
+    public TesseractException(String message) {
+        super(message);
+    }
+
+    public TesseractException(Throwable cause) {
+        super(cause);
+    }
+
+    public TesseractException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

Tess4J/src/net/sourceforge/tess4j/Word.java

@@ -0,0 +1,67 @@
+/**
+ * Copyright @ 2015 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import java.awt.Rectangle;
+
+/**
+ * Encapsulates Tesseract OCR results.
+ */
+public class Word {
+
+    private final String text;
+    private final float confidence;
+    private final Rectangle rect;
+
+    /**
+     * Constructor.
+     * 
+     * @param text
+     * @param confidence
+     * @param boundingBox 
+     */
+    public Word(String text, float confidence, Rectangle boundingBox) {
+        this.text = text;
+        this.confidence = confidence;
+        this.rect = boundingBox;
+    }
+
+    /**
+     * @return the text
+     */
+    public String getText() {
+        return text;
+    }
+
+    /**
+     * @return the confidence
+     */
+    public float getConfidence() {
+        return confidence;
+    }
+
+    /**
+     * @return the bounding box
+     */
+    public Rectangle getBoundingBox() {
+        return rect;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s [Confidence: %f Bounding box: %d %d %d %d]", text, confidence, rect.x, rect.y, rect.width, rect.height);
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/ImageHelper.java

@@ -0,0 +1,216 @@
+/**
+ * Copyright @ 2008 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.RenderingHints;
+import java.awt.Toolkit;
+import java.awt.Transparency;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.image.*;
+import javax.imageio.IIOImage;
+
+public class ImageHelper {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    /**
+     * Convenience method that returns a scaled instance of the provided
+     * {@code BufferedImage}.
+     *
+     * @param image the original image to be scaled
+     * @param targetWidth the desired width of the scaled instance, in pixels
+     * @param targetHeight the desired height of the scaled instance, in pixels
+     * @return a scaled version of the original {@code BufferedImage}
+     */
+    public static BufferedImage getScaledInstance(BufferedImage image, int targetWidth, int targetHeight) {
+        int type = (image.getTransparency() == Transparency.OPAQUE)
+                ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
+        BufferedImage tmp = new BufferedImage(targetWidth, targetHeight, type);
+        Graphics2D g2 = tmp.createGraphics();
+        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+        g2.drawImage(image, 0, 0, targetWidth, targetHeight, null);
+        g2.dispose();
+        return tmp;
+    }
+
+    /**
+     * Convenience method that returns a scaled instance of the provided
+     * {@code IIOImage}.
+     *
+     * @param iioSource the original image to be scaled
+     * @param scale the desired scale
+     * @return a scaled version of the original {@code IIOImage}
+     */
+    public static IIOImage getScaledInstance(IIOImage iioSource, float scale) {
+        if (!(iioSource.getRenderedImage() instanceof BufferedImage)) {
+            throw new IllegalArgumentException("RenderedImage in IIOImage must be BufferedImage");
+        }
+
+        if (Math.abs(scale - 1.0) < 0.001) {
+            return iioSource;
+        }
+
+        BufferedImage source = (BufferedImage) iioSource.getRenderedImage();
+        BufferedImage target = getScaledInstance(source, (int) (scale * source.getWidth()), (int) (scale * source.getHeight()));
+        return new IIOImage(target, null, null);
+    }
+
+    /**
+     * A replacement for the standard <code>BufferedImage.getSubimage</code>
+     * method.
+     *
+     * @param image
+     * @param x the X coordinate of the upper-left corner of the specified
+     * rectangular region
+     * @param y the Y coordinate of the upper-left corner of the specified
+     * rectangular region
+     * @param width the width of the specified rectangular region
+     * @param height the height of the specified rectangular region
+     * @return a BufferedImage that is the subimage of <code>image</code>.
+     */
+    public static BufferedImage getSubImage(BufferedImage image, int x, int y, int width, int height) {
+        int type = (image.getTransparency() == Transparency.OPAQUE)
+                ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
+        BufferedImage tmp = new BufferedImage(width, height, type);
+        Graphics2D g2 = tmp.createGraphics();
+        g2.drawImage(image.getSubimage(x, y, width, height), 0, 0, null);
+        g2.dispose();
+        return tmp;
+    }
+
+    /**
+     * A simple method to convert an image to binary or B/W image.
+     *
+     * @param image input image
+     * @return a monochrome image
+     */
+    public static BufferedImage convertImageToBinary(BufferedImage image) {
+        BufferedImage tmp = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_BINARY);
+        Graphics2D g2 = tmp.createGraphics();
+        g2.drawImage(image, 0, 0, null);
+        g2.dispose();
+        return tmp;
+    }
+
+    /**
+     * A simple method to convert an image to binary or B/W image.
+     *
+     * @param image input image
+     * @return a monochrome image
+     * @deprecated As of release 1.1, renamed to
+     * {@link #convertImageToBinary(BufferedImage image)}
+     */
+    @Deprecated
+    public static BufferedImage convertImage2Binary(BufferedImage image) {
+        return convertImageToBinary(image);
+    }
+
+    /**
+     * A simple method to convert an image to gray scale.
+     *
+     * @param image input image
+     * @return a monochrome image
+     */
+    public static BufferedImage convertImageToGrayscale(BufferedImage image) {
+        BufferedImage tmp = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
+        Graphics2D g2 = tmp.createGraphics();
+        g2.drawImage(image, 0, 0, null);
+        g2.dispose();
+        return tmp;
+    }
+
+    private static final short[] invertTable;
+
+    static {
+        invertTable = new short[256];
+        for (int i = 0; i < 256; i++) {
+            invertTable[i] = (short) (255 - i);
+        }
+    }
+
+    /**
+     * Inverts image color.
+     *
+     * @param image input image
+     * @return an inverted-color image
+     */
+    public static BufferedImage invertImageColor(BufferedImage image) {
+        BufferedImage tmp = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
+        BufferedImageOp invertOp = new LookupOp(new ShortLookupTable(0, invertTable), null);
+        return invertOp.filter(image, tmp);
+    }
+
+    /**
+     * Rotates an image.
+     *
+     * @param image the original image
+     * @param angle the degree of rotation
+     * @return a rotated image
+     */
+    public static BufferedImage rotateImage(BufferedImage image, double angle) {
+        double theta = Math.toRadians(angle);
+        double sin = Math.abs(Math.sin(theta));
+        double cos = Math.abs(Math.cos(theta));
+        int w = image.getWidth();
+        int h = image.getHeight();
+        int newW = (int) Math.floor(w * cos + h * sin);
+        int newH = (int) Math.floor(h * cos + w * sin);
+
+        BufferedImage tmp = new BufferedImage(newW, newH, image.getType());
+        Graphics2D g2d = tmp.createGraphics();
+        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
+                RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+        g2d.translate((newW - w) / 2, (newH - h) / 2);
+        g2d.rotate(theta, w / 2, h / 2);
+        g2d.drawImage(image, 0, 0, null);
+        g2d.dispose();
+        return tmp;
+    }
+
+    /**
+     * Gets an image from Clipboard.
+     *
+     * @return image
+     */
+    public static Image getClipboardImage() {
+        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+        try {
+            return (Image) clipboard.getData(DataFlavor.imageFlavor);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    /**
+     * Clones an image.
+     * http://stackoverflow.com/questions/3514158/how-do-you-clone-a-bufferedimage
+     *
+     * @param bi
+     * @return
+     */
+    public static BufferedImage cloneImage(BufferedImage bi) {
+        ColorModel cm = bi.getColorModel();
+        boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
+        WritableRaster raster = bi.copyData(null);
+        return new BufferedImage(cm, raster, isAlphaPremultiplied, null);
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/ImageIOHelper.java

@@ -0,0 +1,642 @@
+/**
+ * Copyright @ 2008 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.*;
+import java.util.*;
+import javax.imageio.*;
+import javax.imageio.stream.*;
+import javax.imageio.metadata.*;
+import java.awt.Toolkit;
+import java.awt.image.*;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import org.w3c.dom.NodeList;
+
+import com.github.jaiimageio.plugins.tiff.*;
+import com.recognition.software.jdeskew.ImageDeskew;
+import com.recognition.software.jdeskew.ImageUtil;
+import org.apache.commons.io.FilenameUtils;
+
+public class ImageIOHelper {
+
+    final static String OUTPUT_FILE_NAME = "Tesstmp";
+    final static String TIFF_EXT = ".tif";
+    final static String TIFF_FORMAT = "tiff";
+    final static String JAI_IMAGE_WRITER_MESSAGE = "Need to install JAI Image I/O package.\nhttps://java.net/projects/jai-imageio/";
+    final static String JAI_IMAGE_READER_MESSAGE = "Unsupported image format. May need to install JAI Image I/O package.\nhttps://java.net/projects/jai-imageio/";
+
+    /**
+     * Creates a list of TIFF image files from an image file. It basically
+     * converts images of other formats to TIFF format, or a multi-page TIFF
+     * image to multiple TIFF image files.
+     *
+     * @param imageFile input image file
+     * @param index an index of the page; -1 means all pages, as in a multi-page
+     * TIFF image
+     * @return a list of TIFF image files
+     * @throws IOException
+     */
+    public static List<File> createTiffFiles(File imageFile, int index) throws IOException {
+        return createTiffFiles(imageFile, index, false);
+    }
+
+    /**
+     * Creates a list of TIFF image files from an image file. It basically
+     * converts images of other formats to TIFF format, or a multi-page TIFF
+     * image to multiple TIFF image files.
+     *
+     * @param imageFile input image file
+     * @param index an index of the page; -1 means all pages, as in a multi-page
+     * TIFF image
+     * @param preserve preserve compression mode
+     * @return a list of TIFF image files
+     * @throws IOException
+     */
+    public static List<File> createTiffFiles(File imageFile, int index, boolean preserve) throws IOException {
+        List<File> tiffFiles = new ArrayList<File>();
+
+        String imageFileName = imageFile.getName();
+        String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
+
+        Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
+
+        if (!readers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
+        }
+
+        ImageReader reader = readers.next();
+
+        ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
+        reader.setInput(iis);
+        //Read the stream metadata
+//        IIOMetadata streamMetadata = reader.getStreamMetadata();
+
+        //Set up the writeParam
+        TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
+
+        if (!preserve) {
+            tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED); // not preserve original sizes; decompress
+        }
+
+        //Get tif writer and set output to file
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
+
+        if (!writers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
+        }
+
+        ImageWriter writer = writers.next();
+
+        //Read the stream metadata
+        IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
+
+        int imageTotal = reader.getNumImages(true);
+
+        for (int i = 0; i < imageTotal; i++) {
+            // all if index == -1; otherwise, only index-th
+            if (index == -1 || i == index) {
+//                BufferedImage bi = reader.read(i);
+//                IIOImage oimage = new IIOImage(bi, null, reader.getImageMetadata(i));
+                IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
+                File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
+                ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
+                writer.setOutput(ios);
+                writer.write(streamMetadata, oimage, tiffWriteParam);
+                ios.close();
+                tiffFiles.add(tiffFile);
+            }
+        }
+        writer.dispose();
+        reader.dispose();
+
+        return tiffFiles;
+    }
+
+    /**
+     * Creates a list of TIFF image files from a list of <code>IIOImage</code>
+     * objects.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param index an index of the page; -1 means all pages
+     * @return a list of TIFF image files
+     * @throws IOException
+     */
+    public static List<File> createTiffFiles(List<IIOImage> imageList, int index) throws IOException {
+        return createTiffFiles(imageList, index, 0, 0);
+    }
+
+    public static List<File> createTiffFiles(List<IIOImage> imageList, int index, int dpiX, int dpiY) throws IOException {
+        List<File> tiffFiles = new ArrayList<File>();
+
+        //Set up the writeParam
+        TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
+        tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
+
+        //Get tif writer and set output to file
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
+
+        if (!writers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
+        }
+
+        ImageWriter writer = writers.next();
+
+        //Get the stream metadata
+        IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
+
+        // all if index == -1; otherwise, only index-th
+        for (IIOImage oimage : (index == -1 ? imageList : imageList.subList(index, index + 1))) {
+            if (dpiX != 0 && dpiY != 0) {
+                // Get the default image metadata.
+                ImageTypeSpecifier imageType = ImageTypeSpecifier.createFromRenderedImage(oimage.getRenderedImage());
+                IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);
+                imageMetadata = setDPIViaAPI(imageMetadata, dpiX, dpiY);
+                oimage.setMetadata(imageMetadata);
+            }
+
+            File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
+            ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
+            writer.setOutput(ios);
+            writer.write(streamMetadata, oimage, tiffWriteParam);
+            ios.close();
+            tiffFiles.add(tiffFile);
+        }
+        writer.dispose();
+
+        return tiffFiles;
+    }
+
+    /**
+     * Set DPI using API.
+     *
+     * @param imageMetadata original IIOMetadata
+     * @param dpiX horizontal resolution
+     * @param dpiY vertical resolution
+     * @return modified IIOMetadata
+     * @throws IIOInvalidTreeException
+     */
+    private static IIOMetadata setDPIViaAPI(IIOMetadata imageMetadata, int dpiX, int dpiY)
+            throws IIOInvalidTreeException {
+        // Derive the TIFFDirectory from the metadata.
+        TIFFDirectory dir = TIFFDirectory.createFromMetadata(imageMetadata);
+
+        // Get {X,Y}Resolution tags.
+        BaselineTIFFTagSet base = BaselineTIFFTagSet.getInstance();
+        TIFFTag tagXRes = base.getTag(BaselineTIFFTagSet.TAG_X_RESOLUTION);
+        TIFFTag tagYRes = base.getTag(BaselineTIFFTagSet.TAG_Y_RESOLUTION);
+
+        // Create {X,Y}Resolution fields.
+        TIFFField fieldXRes = new TIFFField(tagXRes, TIFFTag.TIFF_RATIONAL,
+                1, new long[][]{{dpiX, 1}});
+        TIFFField fieldYRes = new TIFFField(tagYRes, TIFFTag.TIFF_RATIONAL,
+                1, new long[][]{{dpiY, 1}});
+
+        // Append {X,Y}Resolution fields to directory.
+        dir.addTIFFField(fieldXRes);
+        dir.addTIFFField(fieldYRes);
+
+        // Convert to metadata object.
+        IIOMetadata metadata = dir.getAsMetadata();
+
+        // Add other metadata.
+        IIOMetadataNode root = new IIOMetadataNode("javax_imageio_1.0");
+        IIOMetadataNode horiz = new IIOMetadataNode("HorizontalPixelSize");
+        horiz.setAttribute("value", Double.toString(25.4f / dpiX));
+        IIOMetadataNode vert = new IIOMetadataNode("VerticalPixelSize");
+        vert.setAttribute("value", Double.toString(25.4f / dpiY));
+        IIOMetadataNode dim = new IIOMetadataNode("Dimension");
+        dim.appendChild(horiz);
+        dim.appendChild(vert);
+        root.appendChild(dim);
+        metadata.mergeTree("javax_imageio_1.0", root);
+
+        return metadata;
+    }
+
+    /**
+     * Gets pixel data of an <code>IIOImage</code> object.
+     *
+     * @param image an <code>IIOImage</code> object
+     * @return a byte buffer of pixel data
+     * @throws IOException
+     */
+    public static ByteBuffer getImageByteBuffer(IIOImage image) throws IOException {
+        return getImageByteBuffer(image.getRenderedImage());
+    }
+
+    /**
+     * Gets pixel data of an <code>RenderedImage</code> object.
+     *
+     * @param image an <code>RenderedImage</code> object
+     * @return a byte buffer of pixel data
+     * @throws IOException
+     */
+    public static ByteBuffer getImageByteBuffer(RenderedImage image) throws IOException {
+        //Set up the writeParam
+        TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
+        tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
+
+        //Get tif writer and set output to file
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
+
+        if (!writers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
+        }
+
+        ImageWriter writer = writers.next();
+
+        //Get the stream metadata
+        IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
+        writer.setOutput(ios);
+        writer.write(streamMetadata, new IIOImage(image, null, null), tiffWriteParam);
+//        writer.write(image);
+        writer.dispose();
+//        ImageIO.write(image, "tiff", ios); // this can be used in lieu of writer
+        ios.seek(0);
+        BufferedImage bi = ImageIO.read(ios);
+        return convertImageData(bi);
+    }
+
+    /**
+     * Converts <code>BufferedImage</code> to <code>ByteBuffer</code>.
+     *
+     * @param bi Input image
+     * @return pixel data
+     */
+    public static ByteBuffer convertImageData(BufferedImage bi) {
+        DataBuffer buff = bi.getRaster().getDataBuffer();
+        // ClassCastException thrown if buff not instanceof DataBufferByte because raster data is not necessarily bytes.
+        // Convert the original buffered image to grayscale.
+        if (!(buff instanceof DataBufferByte)) {
+            bi = ImageHelper.convertImageToGrayscale(bi);
+            buff = bi.getRaster().getDataBuffer();
+        }
+        byte[] pixelData = ((DataBufferByte) buff).getData();
+        //        return ByteBuffer.wrap(pixelData);
+        ByteBuffer buf = ByteBuffer.allocateDirect(pixelData.length);
+        buf.order(ByteOrder.nativeOrder());
+        buf.put(pixelData);
+        buf.flip();
+        return buf;
+    }
+
+    /**
+     * Gets a list of <code>BufferedImage</code> objects for an image file.
+     *
+     * @param imageFile input image file. It can be any of the supported
+     * formats, including TIFF, JPEG, GIF, PNG, BMP, JPEG
+     * @return a list of <code>BufferedImage</code> objects
+     * @throws IOException
+     */
+    public static List<BufferedImage> getImageList(File imageFile) throws IOException {
+        ImageReader reader = null;
+        ImageInputStream iis = null;
+
+        try {
+            List<BufferedImage> biList = new ArrayList<BufferedImage>();
+
+            String imageFileName = imageFile.getName();
+            String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
+            Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
+            if (!readers.hasNext()) {
+                throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
+            }
+
+            reader = readers.next();
+
+            iis = ImageIO.createImageInputStream(imageFile);
+            reader.setInput(iis);
+
+            int imageTotal = reader.getNumImages(true);
+
+            for (int i = 0; i < imageTotal; i++) {
+                BufferedImage bi = reader.read(i);
+                biList.add(bi);
+            }
+
+            return biList;
+        } finally {
+            try {
+                if (iis != null) {
+                    iis.close();
+                }
+                if (reader != null) {
+                    reader.dispose();
+                }
+            } catch (Exception e) {
+                // ignore
+            }
+        }
+    }
+
+    /**
+     * Gets a list of <code>IIOImage</code> objects for an image file.
+     *
+     * @param imageFile input image file. It can be any of the supported
+     * formats, including TIFF, JPEG, GIF, PNG, BMP, JPEG, and PDF if GPL
+     * Ghostscript is installed
+     * @return a list of <code>IIOImage</code> objects
+     * @throws IOException
+     */
+    public static List<IIOImage> getIIOImageList(File imageFile) throws IOException {
+        File workingTiffFile = null;
+
+        ImageReader reader = null;
+        ImageInputStream iis = null;
+
+        try {
+            // convert PDF to TIFF
+            if (imageFile.getName().toLowerCase().endsWith(".pdf")) {
+                workingTiffFile = PdfUtilities.convertPdf2Tiff(imageFile);
+                imageFile = workingTiffFile;
+            }
+
+            List<IIOImage> iioImageList = new ArrayList<IIOImage>();
+
+            String imageFileName = imageFile.getName();
+            String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
+            if (imageFormat.matches("(pbm|pgm|ppm)")) {
+                imageFormat = "pnm";
+            } else if (imageFormat.matches("(jp2|j2k|jpf|jpx|jpm)")) {
+                imageFormat = "jpeg2000";
+            }
+            Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
+
+            if (!readers.hasNext()) {
+                throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
+            }
+
+            reader = readers.next();
+            iis = ImageIO.createImageInputStream(imageFile);
+            reader.setInput(iis);
+
+            int imageTotal = reader.getNumImages(true);
+
+            for (int i = 0; i < imageTotal; i++) {
+//                IIOImage oimage = new IIOImage(reader.read(i), null, reader.getImageMetadata(i));
+                IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
+                iioImageList.add(oimage);
+            }
+
+            return iioImageList;
+        } finally {
+            try {
+                if (iis != null) {
+                    iis.close();
+                }
+                if (reader != null) {
+                    reader.dispose();
+                }
+            } catch (Exception e) {
+                // ignore
+            }
+            if (workingTiffFile != null && workingTiffFile.exists()) {
+                workingTiffFile.delete();
+            }
+        }
+    }
+
+    /**
+     * Gets a list of <code>IIOImage</code> objects for a
+     * <code>BufferedImage</code>.
+     *
+     * @param bi input image
+     * @return a list of <code>IIOImage</code> objects
+     * @throws IOException
+     */
+    public static List<IIOImage> getIIOImageList(BufferedImage bi) throws IOException {
+        List<IIOImage> iioImageList = new ArrayList<IIOImage>();
+        IIOImage oimage = new IIOImage(bi, null, null);
+        iioImageList.add(oimage);
+        return iioImageList;
+    }
+
+    /**
+     * Merges multiple images into one multi-page TIFF image.
+     *
+     * @param inputImages an array of image files
+     * @param outputTiff the output multi-page TIFF file
+     * @throws IOException
+     */
+    public static void mergeTiff(File[] inputImages, File outputTiff) throws IOException {
+        if (inputImages.length == 0) {
+            // if no image
+            return;
+        }
+
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
+
+        if (!writers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
+        }
+
+        ImageWriter writer = writers.next();
+
+        //Set up the writeParam
+        TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
+//        tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED); // commented out to preserve original sizes
+
+        //Get the stream metadata
+        IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
+
+        ImageOutputStream ios = ImageIO.createImageOutputStream(outputTiff);
+        writer.setOutput(ios);
+
+        boolean firstPage = true;
+        int index = 1;
+        for (File inputImage : inputImages) {
+            List<IIOImage> iioImages = getIIOImageList(inputImage);
+            for (IIOImage iioImage : iioImages) {
+                if (firstPage) {
+                    writer.write(streamMetadata, iioImage, tiffWriteParam);
+                    firstPage = false;
+                } else {
+                    writer.writeInsert(index++, iioImage, tiffWriteParam);
+                }
+            }
+        }
+
+        ios.close();
+
+        writer.dispose();
+    }
+
+    /**
+     * Merges multiple images into one multi-page TIFF image.
+     *
+     * @param inputImages an array of <code>BufferedImage</code>
+     * @param outputTiff the output TIFF file
+     * @throws IOException
+     */
+    public static void mergeTiff(BufferedImage[] inputImages, File outputTiff) throws IOException {
+        mergeTiff(inputImages, outputTiff, null);
+    }
+
+    /**
+     * Merges multiple images into one multi-page TIFF image.
+     *
+     * @param inputImages an array of <code>BufferedImage</code>
+     * @param outputTiff the output TIFF file
+     * @param compressionType valid values: LZW, CCITT T.6, PackBits
+     * @throws IOException
+     */
+    public static void mergeTiff(BufferedImage[] inputImages, File outputTiff, String compressionType) throws IOException {
+        List<IIOImage> imageList = new ArrayList<IIOImage>();
+
+        for (BufferedImage inputImage : inputImages) {
+            imageList.add(new IIOImage(inputImage, null, null));
+        }
+
+        mergeTiff(imageList, outputTiff, compressionType);
+    }
+
+    /**
+     * Merges multiple images into one multi-page TIFF image.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param outputTiff the output TIFF file
+     * @throws IOException
+     */
+    public static void mergeTiff(List<IIOImage> imageList, File outputTiff) throws IOException {
+        mergeTiff(imageList, outputTiff, null);
+    }
+
+    /**
+     * Merges multiple images into one multi-page TIFF image.
+     *
+     * @param imageList a list of <code>IIOImage</code> objects
+     * @param outputTiff the output TIFF file
+     * @param compressionType valid values: LZW, CCITT T.6, PackBits
+     * @throws IOException
+     */
+    public static void mergeTiff(List<IIOImage> imageList, File outputTiff, String compressionType) throws IOException {
+        if (imageList == null || imageList.isEmpty()) {
+            // if no image
+            return;
+        }
+
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
+        if (!writers.hasNext()) {
+            throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
+        }
+
+        ImageWriter writer = writers.next();
+
+        //Set up the writeParam
+        TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
+//        tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED); // comment out to preserve original sizes
+        if (compressionType != null) {
+            tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+            tiffWriteParam.setCompressionType(compressionType);
+        }
+
+        //Get the stream metadata
+        IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
+
+        ImageOutputStream ios = ImageIO.createImageOutputStream(outputTiff);
+        writer.setOutput(ios);
+
+        int dpiX = 300;
+        int dpiY = 300;
+
+        for (IIOImage iioImage : imageList) {
+            // Get the default image metadata.
+            ImageTypeSpecifier imageType = ImageTypeSpecifier.createFromRenderedImage(iioImage.getRenderedImage());
+            IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);
+            imageMetadata = setDPIViaAPI(imageMetadata, dpiX, dpiY);
+            iioImage.setMetadata(imageMetadata);
+        }
+
+        IIOImage firstIioImage = imageList.remove(0);
+        writer.write(streamMetadata, firstIioImage, tiffWriteParam);
+
+        int i = 1;
+        for (IIOImage iioImage : imageList) {
+            writer.writeInsert(i++, iioImage, tiffWriteParam);
+        }
+        ios.close();
+
+        writer.dispose();
+    }
+
+    /**
+     * Deskews image.
+     * 
+     * @param imageFile input image
+     * @param minimumDeskewThreshold minimum deskew threshold (typically, 0.05d)
+     * @return temporary multi-page TIFF image file
+     * @throws IOException 
+     */
+    public static File deskewImage(File imageFile, double minimumDeskewThreshold) throws IOException {
+        List<BufferedImage> imageList = getImageList(imageFile);
+        for (int i = 0; i < imageList.size(); i++) {
+            BufferedImage bi = imageList.get(i);
+            ImageDeskew deskew = new ImageDeskew(bi);
+            double imageSkewAngle = deskew.getSkewAngle();
+
+            if ((imageSkewAngle > minimumDeskewThreshold || imageSkewAngle < -(minimumDeskewThreshold))) {
+                bi = ImageUtil.rotate(bi, -imageSkewAngle, bi.getWidth() / 2, bi.getHeight() / 2);
+                imageList.set(i, bi); // replace original with deskewed image
+            }
+        }
+
+        File tempImageFile = File.createTempFile(FilenameUtils.getBaseName(imageFile.getName()), ".tif");
+        ImageIOHelper.mergeTiff(imageList.toArray(new BufferedImage[0]), tempImageFile);
+
+        return tempImageFile;
+    }
+
+    /**
+     * Reads image meta data.
+     *
+     * @param oimage
+     * @return a map of meta data
+     */
+    public static Map<String, String> readImageData(IIOImage oimage) {
+        Map<String, String> dict = new HashMap<String, String>();
+
+        IIOMetadata imageMetadata = oimage.getMetadata();
+        if (imageMetadata != null) {
+            IIOMetadataNode dimNode = (IIOMetadataNode) imageMetadata.getAsTree("javax_imageio_1.0");
+            NodeList nodes = dimNode.getElementsByTagName("HorizontalPixelSize");
+            int dpiX;
+            if (nodes.getLength() > 0) {
+                float dpcWidth = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue());
+                dpiX = (int) Math.round(25.4f / dpcWidth);
+            } else {
+                dpiX = Toolkit.getDefaultToolkit().getScreenResolution();
+            }
+            dict.put("dpiX", String.valueOf(dpiX));
+
+            nodes = dimNode.getElementsByTagName("VerticalPixelSize");
+            int dpiY;
+            if (nodes.getLength() > 0) {
+                float dpcHeight = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue());
+                dpiY = (int) Math.round(25.4f / dpcHeight);
+            } else {
+                dpiY = Toolkit.getDefaultToolkit().getScreenResolution();
+            }
+            dict.put("dpiY", String.valueOf(dpiY));
+        }
+
+        return dict;
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/LoadLibs.java

@@ -0,0 +1,232 @@
+/**
+ * Copyright @ 2014 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.JarURLConnection;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.Enumeration;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+import org.jboss.vfs.VFS;
+import org.jboss.vfs.VirtualFile;
+import org.slf4j.LoggerFactory;
+
+import com.sun.jna.Native;
+import com.sun.jna.Platform;
+
+import net.sourceforge.tess4j.TessAPI;
+
+/**
+ * Loads native libraries from JAR or project folder.
+ *
+ * @author O.J. Sousa Rodrigues
+ * @author Quan Nguyen
+ */
+public class LoadLibs {
+
+    private static final String VFS_PROTOCOL = "vfs";
+    private static final String JNA_LIBRARY_PATH = "jna.library.path";
+    public static final String TESS4J_TEMP_DIR = new File(System.getProperty("java.io.tmpdir"), "tess4j").getPath();
+
+    /**
+     * Native library name.
+     */
+    public static final String LIB_NAME = "libtesseract3051";
+    public static final String LIB_NAME_NON_WIN = "tesseract";
+
+    private static final org.slf4j.Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    static {
+        System.setProperty("jna.encoding", "UTF8");
+        File targetTempFolder = extractTessResources(Platform.RESOURCE_PREFIX);
+        if (targetTempFolder != null && targetTempFolder.exists()) {
+            String userCustomizedPath = System.getProperty(JNA_LIBRARY_PATH);
+            if (null == userCustomizedPath || userCustomizedPath.isEmpty()) {
+                System.setProperty(JNA_LIBRARY_PATH, targetTempFolder.getPath());
+            } else {
+                System.setProperty(JNA_LIBRARY_PATH, userCustomizedPath + File.pathSeparator + targetTempFolder.getPath());
+            }
+        }
+    }
+
+    /**
+     * Loads Tesseract library via JNA.
+     *
+     * @return TessAPI instance being loaded using
+     * <code>Native.loadLibrary()</code>.
+     */
+    public static TessAPI getTessAPIInstance() {
+        return (TessAPI) Native.loadLibrary(getTesseractLibName(), TessAPI.class);
+    }
+
+    /**
+     * Gets native library name.
+     *
+     * @return the name of the tesseract library to be loaded using the
+     * <code>Native.register()</code>.
+     */
+    public static String getTesseractLibName() {
+        return Platform.isWindows() ? LIB_NAME : LIB_NAME_NON_WIN;
+    }
+
+    /**
+     * Extracts tesseract resources to temp folder.
+     *
+     * @param resourceName name of file or directory
+     * @return target path, which could be file or directory
+     */
+    public static synchronized File extractTessResources(String resourceName) {
+        File targetPath = null;
+
+        try {
+            targetPath = new File(TESS4J_TEMP_DIR, resourceName);
+
+            Enumeration<URL> resources = LoadLibs.class.getClassLoader().getResources(resourceName);
+            while (resources.hasMoreElements()) {
+                URL resourceUrl = resources.nextElement();
+                copyResources(resourceUrl, targetPath);
+            }
+        } catch (IOException | URISyntaxException e) {
+            logger.warn(e.getMessage(), e);
+        }
+
+        return targetPath;
+    }
+
+    /**
+     * Copies resources to target folder.
+     *
+     * @param resourceUrl
+     * @param targetPath
+     * @return
+     */
+    static void copyResources(URL resourceUrl, File targetPath) throws IOException, URISyntaxException {
+        if (resourceUrl == null) {
+            return;
+        }
+
+        URLConnection urlConnection = resourceUrl.openConnection();
+
+        /**
+         * Copy resources either from inside jar or from project folder.
+         */
+        if (urlConnection instanceof JarURLConnection) {
+            copyJarResourceToPath((JarURLConnection) urlConnection, targetPath);
+        } else if (VFS_PROTOCOL.equals(resourceUrl.getProtocol())) {
+            VirtualFile virtualFileOrFolder = VFS.getChild(resourceUrl.toURI());
+            copyFromWarToFolder(virtualFileOrFolder, targetPath);
+        } else {
+            File file = new File(resourceUrl.getPath());
+            if (file.isDirectory()) {
+                for (File resourceFile : FileUtils.listFiles(file, null, true)) {
+                    int index = resourceFile.getPath().lastIndexOf(targetPath.getName()) + targetPath.getName().length();
+                    File targetFile = new File(targetPath, resourceFile.getPath().substring(index));
+                    if (!targetFile.exists() || targetFile.length() != resourceFile.length()) {
+                        if (resourceFile.isFile()) {
+                            FileUtils.copyFile(resourceFile, targetFile);
+                        }
+                    }
+                }
+            } else {
+                if (!targetPath.exists() || targetPath.length() != file.length()) {
+                    FileUtils.copyFile(file, targetPath);
+                }
+            }
+        }
+    }
+
+    /**
+     * Copies resources from the jar file of the current thread and extract it
+     * to the destination path.
+     *
+     * @param jarConnection
+     * @param destPath destination file or directory
+     */
+    static void copyJarResourceToPath(JarURLConnection jarConnection, File destPath) {
+        try (JarFile jarFile = jarConnection.getJarFile()) {
+            String jarConnectionEntryName = jarConnection.getEntryName();
+            if (!jarConnectionEntryName.endsWith("/")) {
+                jarConnectionEntryName += "/";
+            }
+
+            /**
+             * Iterate all entries in the jar file.
+             */
+            for (Enumeration<JarEntry> e = jarFile.entries(); e.hasMoreElements();) {
+                JarEntry jarEntry = e.nextElement();
+                String jarEntryName = jarEntry.getName();
+
+                /**
+                 * Extract files only if they match the path.
+                 */
+                if (jarEntryName.startsWith(jarConnectionEntryName)) {
+                    String filename = jarEntryName.substring(jarConnectionEntryName.length());
+                    File targetFile = new File(destPath, filename);
+
+                    if (jarEntry.isDirectory()) {
+                        targetFile.mkdirs();
+                    } else {
+                        if (!targetFile.exists() || targetFile.length() != jarEntry.getSize()) {
+                            try (InputStream is = jarFile.getInputStream(jarEntry);
+                                    OutputStream out = FileUtils.openOutputStream(targetFile)) {
+                                IOUtils.copy(is, out);
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (IOException e) {
+            logger.warn(e.getMessage(), e);
+        }
+    }
+
+    /**
+     * Copies resources from WAR to target folder.
+     *
+     * @param virtualFileOrFolder
+     * @param targetFolder
+     * @throws IOException
+     */
+    static void copyFromWarToFolder(VirtualFile virtualFileOrFolder, File targetFolder) throws IOException {
+        if (virtualFileOrFolder.isDirectory() && !virtualFileOrFolder.getName().contains(".")) {
+            if (targetFolder.getName().equalsIgnoreCase(virtualFileOrFolder.getName())) {
+                for (VirtualFile innerFileOrFolder : virtualFileOrFolder.getChildren()) {
+                    copyFromWarToFolder(innerFileOrFolder, targetFolder);
+                }
+            } else {
+                File innerTargetFolder = new File(targetFolder, virtualFileOrFolder.getName());
+                innerTargetFolder.mkdir();
+                for (VirtualFile innerFileOrFolder : virtualFileOrFolder.getChildren()) {
+                    copyFromWarToFolder(innerFileOrFolder, innerTargetFolder);
+                }
+            }
+        } else {
+            File targetFile = new File(targetFolder, virtualFileOrFolder.getName());
+            if (!targetFile.exists() || targetFile.length() != virtualFileOrFolder.getSize()) {
+                FileUtils.copyURLToFile(virtualFileOrFolder.asFileURL(), targetFile);
+            }
+        }
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/LoggHelper.java

@@ -0,0 +1,34 @@
+/**
+ * Copyright @ 2015 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+/**
+ * Helper for logging.
+ *
+ * @author O.J. Sousa Rodrigues
+ */
+public class LoggHelper extends Exception {
+
+    @Override
+    public String toString() {
+        LoggerConfig.INSTANCE.loadConfig();
+
+        StackTraceElement[] sTrace = this.getStackTrace();
+        String className = sTrace[0].getClassName();
+
+        return className;
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/LoggerConfig.java

@@ -0,0 +1,51 @@
+/**
+ * Copyright @ 2015 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import org.slf4j.bridge.SLF4JBridgeHandler;
+
+/**
+ * Logging configuration.
+ *
+ * @author O.J. Sousa Rodrigues
+ */
+public enum LoggerConfig {
+
+    INSTANCE;
+
+    private boolean isLoaded = false;
+
+    /**
+     * This method loads the Logger configuration.
+     *
+     * @return true if the Logger configuration was loaded successfully.
+     */
+    public boolean loadConfig() {
+
+        try {
+            if (!isLoaded) {
+                SLF4JBridgeHandler.removeHandlersForRootLogger();
+                SLF4JBridgeHandler.install();
+                this.isLoaded = true;
+//                System.out.println("Logger configuration was loaded successfully.");
+            }
+        } catch (final Exception e) {
+            System.err.println("Logger configuration could not be loaded.");
+        }
+
+        return this.isLoaded;
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/PdfBoxUtilities.java

@@ -0,0 +1,215 @@
+/**
+ * Copyright @ 2018 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
+import org.apache.pdfbox.io.MemoryUsageSetting;
+import org.apache.pdfbox.multipdf.PDFMergerUtility;
+import org.apache.pdfbox.multipdf.Splitter;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.rendering.ImageType;
+import org.apache.pdfbox.rendering.PDFRenderer;
+import org.apache.pdfbox.tools.imageio.ImageIOUtil;
+import org.slf4j.LoggerFactory;
+
+/**
+ * PDF utilities based on PDFBox.
+ *
+ * @author Robert Drysdale
+ * @author Quan Nguyen
+ */
+public class PdfBoxUtilities {
+
+    private static final org.slf4j.Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    /**
+     * Converts PDF to TIFF format.
+     *
+     * @param inputPdfFile input file
+     * @return a multi-page TIFF image
+     * @throws IOException
+     */
+    public static File convertPdf2Tiff(File inputPdfFile) throws IOException {
+        File[] pngFiles = null;
+
+        try {
+            pngFiles = convertPdf2Png(inputPdfFile);
+            File tiffFile = File.createTempFile("multipage", ".tif");
+
+            // put PNG images into a single multi-page TIFF image for return
+            ImageIOHelper.mergeTiff(pngFiles, tiffFile);
+            return tiffFile;
+        } finally {
+            if (pngFiles != null && pngFiles.length > 0) {
+                // get the working directory of the PNG files
+                File pngDirectory = new File(pngFiles[0].getParent());
+                // delete temporary PNG images
+                for (File tempFile : pngFiles) {
+                    tempFile.delete();
+                }
+
+                pngDirectory.delete();
+            }
+        }
+    }
+
+    /**
+     * Converts PDF to PNG format.
+     *
+     * @param inputPdfFile input file
+     * @return an array of PNG images
+     * @throws java.io.IOException
+     */
+    public static File[] convertPdf2Png(File inputPdfFile) throws IOException {
+        Path path = Files.createTempDirectory("tessimages");
+        File imageDir = path.toFile();
+
+        PDDocument document = null;
+        try {
+            document = PDDocument.load(inputPdfFile);
+            PDFRenderer pdfRenderer = new PDFRenderer(document);
+            for (int page = 0; page < document.getNumberOfPages(); ++page) {
+                BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
+
+                // suffix in filename will be used as the file format
+                String filename = String.format("workingimage%04d.png", page + 1);
+                ImageIOUtil.writeImage(bim, new File(imageDir, filename).getAbsolutePath(), 300);
+            }
+        } catch (IOException ioe) {
+            logger.error("Error extracting PDF Document => " + ioe);
+        } finally {
+            if (imageDir.list().length == 0) {
+                imageDir.delete();
+            }
+
+            if (document != null) {
+                try {
+                    document.close();
+                } catch (Exception e) {
+                }
+            }
+        }
+
+        // find working files
+        File[] workingFiles = imageDir.listFiles(new FilenameFilter() {
+
+            @Override
+            public boolean accept(File dir, String name) {
+                return name.toLowerCase().matches("workingimage\\d{4}\\.png$");
+            }
+        });
+
+        Arrays.sort(workingFiles, new Comparator<File>() {
+            @Override
+            public int compare(File f1, File f2) {
+                return f1.getName().compareTo(f2.getName());
+            }
+        });
+
+        return workingFiles;
+    }
+
+    /**
+     * Splits PDF.
+     *
+     * @param inputPdfFile input file
+     * @param outputPdfFile output file
+     * @param firstPage begin page
+     * @param lastPage end page
+     */
+    public static void splitPdf(File inputPdfFile, File outputPdfFile, int firstPage, int lastPage) {
+        PDDocument document = null;
+        try {
+            document = PDDocument.load(inputPdfFile);
+            Splitter splitter = new Splitter();
+
+            splitter.setStartPage(firstPage);
+            splitter.setEndPage(lastPage);
+            splitter.setSplitAtPage(lastPage - firstPage + 1);
+
+            List<PDDocument> documents = splitter.split(document);
+
+            if (documents.size() == 1) {
+                PDDocument outputPdf = documents.get(0);
+                outputPdf.save(outputPdfFile);
+                outputPdf.close();
+            } else {
+                logger.error("Splitter returned " + documents.size() + " documents rather than expected of 1");
+            }
+        } catch (IOException ioe) {
+            logger.error("Exception splitting PDF => " + ioe);
+        } finally {
+            if (document != null) {
+                try {
+                    document.close();
+                } catch (Exception e) {
+                }
+            }
+        }
+    }
+
+    /**
+     * Gets PDF Page Count.
+     *
+     * @param inputPdfFile input file
+     * @return number of pages
+     */
+    public static int getPdfPageCount(File inputPdfFile) {
+        PDDocument document = null;
+        try {
+            document = PDDocument.load(inputPdfFile);
+            return document.getNumberOfPages();
+        } catch (IOException ioe) {
+            logger.error("Error counting PDF pages => " + ioe);
+            return - 1;
+        } finally {
+            if (document != null) {
+                try {
+                    document.close();
+                } catch (Exception e) {
+                }
+            }
+        }
+    }
+
+    /**
+     * Merges PDF files.
+     *
+     * @param inputPdfFiles array of input files
+     * @param outputPdfFile output file
+     */
+    public static void mergePdf(File[] inputPdfFiles, File outputPdfFile) {
+        try {
+            PDFMergerUtility mergerUtility = new PDFMergerUtility();
+            mergerUtility.setDestinationFileName(outputPdfFile.getPath());
+            for (File inputPdfFile : inputPdfFiles) {
+                mergerUtility.addSource(inputPdfFile);
+            }
+            mergerUtility.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
+        } catch (IOException ioe) {
+            logger.error("Error counting PDF pages => " + ioe);
+        }
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/PdfGsUtilities.java

@@ -0,0 +1,319 @@
+/**
+ * Copyright @ 2009 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
+import org.ghost4j.Ghostscript;
+import org.ghost4j.GhostscriptException;
+import org.slf4j.LoggerFactory;
+
+/**
+ * PDF utilities based on Ghostscript.
+ */
+public class PdfGsUtilities {
+
+    public static final String GS_INSTALL = "\nPlease download, install GPL Ghostscript from http://www.ghostscript.com\nand/or set the appropriate path variable.";
+
+    private static final org.slf4j.Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    /**
+     * Converts PDF to TIFF format.
+     *
+     * @param inputPdfFile input file
+     * @return a multi-page TIFF image
+     * @throws IOException
+     */
+    public static File convertPdf2Tiff(File inputPdfFile) throws IOException {
+        File[] pngFiles = null;
+
+        try {
+            pngFiles = convertPdf2Png(inputPdfFile);
+            File tiffFile = File.createTempFile("multipage", ".tif");
+
+            // put PNG images into a single multi-page TIFF image for return
+            ImageIOHelper.mergeTiff(pngFiles, tiffFile);
+            return tiffFile;
+        } finally {
+            if (pngFiles != null && pngFiles.length > 0) {
+                // get the working directory of the PNG files
+                File pngDirectory = new File(pngFiles[0].getParent());
+                // delete temporary PNG images
+                for (File tempFile : pngFiles) {
+                    tempFile.delete();
+                }
+
+                pngDirectory.delete();
+            }
+        }
+    }
+
+    /**
+     * Converts PDF to PNG format.
+     *
+     * @param inputPdfFile input file
+     * @return an array of PNG images
+     * @throws java.io.IOException
+     */
+    public synchronized static File[] convertPdf2Png(File inputPdfFile) throws IOException {
+        Path path = Files.createTempDirectory("tessimages");
+        File imageDir = path.toFile();
+
+        //get Ghostscript instance
+        Ghostscript gs = Ghostscript.getInstance();
+
+        //prepare Ghostscript interpreter parameters
+        //refer to Ghostscript documentation for parameter usage
+        List<String> gsArgs = new ArrayList<String>();
+        gsArgs.add("-gs");
+        gsArgs.add("-dNOPAUSE");
+        gsArgs.add("-dQUIET");
+        gsArgs.add("-dBATCH");
+        gsArgs.add("-dSAFER");
+        gsArgs.add("-sDEVICE=pnggray");
+        gsArgs.add("-r300");
+        gsArgs.add("-dGraphicsAlphaBits=4");
+        gsArgs.add("-dTextAlphaBits=4");
+        gsArgs.add("-sOutputFile=" + imageDir.getPath() + "/workingimage%04d.png");
+        gsArgs.add(inputPdfFile.getPath());
+
+        //execute and exit interpreter
+        try {
+            synchronized (gs) {
+                gs.initialize(gsArgs.toArray(new String[0]));
+                gs.exit();
+            }
+        } catch (UnsatisfiedLinkError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (NoClassDefFoundError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (GhostscriptException e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(e.getMessage());
+        } finally {
+            if (imageDir.list().length == 0) {
+                imageDir.delete();
+            }
+
+            //delete interpreter instance (safer)
+            try {
+                Ghostscript.deleteInstance();
+            } catch (GhostscriptException e) {
+                //nothing
+            }
+        }
+
+        // find working files
+        File[] workingFiles = imageDir.listFiles(new FilenameFilter() {
+
+            @Override
+            public boolean accept(File dir, String name) {
+                return name.toLowerCase().matches("workingimage\\d{4}\\.png$");
+            }
+        });
+
+        Arrays.sort(workingFiles, new Comparator<File>() {
+            @Override
+            public int compare(File f1, File f2) {
+                return f1.getName().compareTo(f2.getName());
+            }
+        });
+
+        return workingFiles;
+    }
+
+    /**
+     * Splits PDF.
+     *
+     * @param inputPdfFile input file
+     * @param outputPdfFile output file
+     * @param firstPage begin page
+     * @param lastPage end page
+     */
+    public static void splitPdf(File inputPdfFile, File outputPdfFile, int firstPage, int lastPage) {
+        //get Ghostscript instance
+        Ghostscript gs = Ghostscript.getInstance();
+
+        //prepare Ghostscript interpreter parameters
+        //refer to Ghostscript documentation for parameter usage
+        //gs -sDEVICE=pdfwrite -dNOPAUSE -dQUIET -dBATCH -dFirstPage=m -dLastPage=n -sOutputFile=out.pdf in.pdf
+        List<String> gsArgs = new ArrayList<String>();
+        gsArgs.add("-gs");
+        gsArgs.add("-dNOPAUSE");
+        gsArgs.add("-dQUIET");
+        gsArgs.add("-dBATCH");
+        gsArgs.add("-sDEVICE=pdfwrite");
+        if (firstPage > 0) {
+            gsArgs.add("-dFirstPage=" + firstPage);
+        }
+        if (lastPage > 0) {
+            gsArgs.add("-dLastPage=" + lastPage);
+        }
+        gsArgs.add("-sOutputFile=" + outputPdfFile.getPath());
+        gsArgs.add(inputPdfFile.getPath());
+
+        //execute and exit interpreter
+        try {
+            synchronized (gs) {
+                gs.initialize(gsArgs.toArray(new String[0]));
+                gs.exit();
+            }
+        } catch (UnsatisfiedLinkError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (NoClassDefFoundError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (GhostscriptException e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(e.getMessage());
+        } finally {
+            //delete interpreter instance (safer)
+            try {
+                Ghostscript.deleteInstance();
+            } catch (GhostscriptException e) {
+                //nothing
+            }
+        }
+    }
+
+    /**
+     * Gets PDF Page Count.
+     *
+     * @param inputPdfFile input file
+     * @return number of pages
+     */
+    public static int getPdfPageCount(File inputPdfFile) {
+        //get Ghostscript instance
+        Ghostscript gs = Ghostscript.getInstance();
+
+        //prepare Ghostscript interpreter parameters
+        //refer to Ghostscript documentation for parameter usage
+        //gs -q -dNODISPLAY -c "(input.pdf) (r) file runpdfbegin pdfpagecount = quit"
+        List<String> gsArgs = new ArrayList<String>();
+        gsArgs.add("-gs");
+        gsArgs.add("-dNOPAUSE");
+        gsArgs.add("-dQUIET");
+        gsArgs.add("-dNODISPLAY");
+        gsArgs.add("-dBATCH");
+        gsArgs.add("-c");
+        String cValue = String.format("(%s) (r) file runpdfbegin pdfpagecount = quit", inputPdfFile.getPath().replace('\\', '/'));
+        gsArgs.add(cValue);
+
+        int pageCount = 0;
+        ByteArrayOutputStream os;
+
+        //execute and exit interpreter
+        try {
+            synchronized (gs) {
+                //output
+                os = new ByteArrayOutputStream();
+                gs.setStdOut(os);
+                gs.initialize(gsArgs.toArray(new String[0]));
+                pageCount = Integer.parseInt(os.toString().trim());
+                os.close();
+            }
+        } catch (UnsatisfiedLinkError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (NoClassDefFoundError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (GhostscriptException e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(e.getMessage());
+        } catch (Exception e) {
+            logger.error(e.getMessage());
+        } finally {
+            //delete interpreter instance (safer)
+            try {
+                Ghostscript.deleteInstance();
+            } catch (GhostscriptException e) {
+                //nothing
+            }
+        }
+
+        return pageCount;
+    }
+
+    /**
+     * Merges PDF files.
+     *
+     * @param inputPdfFiles array of input files
+     * @param outputPdfFile output file
+     */
+    public static void mergePdf(File[] inputPdfFiles, File outputPdfFile) {
+        //get Ghostscript instance
+        Ghostscript gs = Ghostscript.getInstance();
+
+        //prepare Ghostscript interpreter parameters
+        //refer to Ghostscript documentation for parameter usage
+        //gs -sDEVICE=pdfwrite -dNOPAUSE -dQUIET -dBATCH -sOutputFile=out.pdf in1.pdf in2.pdf in3.pdf
+        List<String> gsArgs = new ArrayList<String>();
+        gsArgs.add("-gs");
+        gsArgs.add("-dNOPAUSE");
+        gsArgs.add("-dQUIET");
+        gsArgs.add("-dBATCH");
+        gsArgs.add("-sDEVICE=pdfwrite");
+        gsArgs.add("-sOutputFile=" + outputPdfFile.getPath());
+
+        for (File inputPdfFile : inputPdfFiles) {
+            gsArgs.add(inputPdfFile.getPath());
+        }
+
+        //execute and exit interpreter
+        try {
+            synchronized (gs) {
+                gs.initialize(gsArgs.toArray(new String[0]));
+                gs.exit();
+            }
+        } catch (UnsatisfiedLinkError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (NoClassDefFoundError e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(getMessage(e.getMessage()));
+        } catch (GhostscriptException e) {
+            logger.error(e.getMessage());
+            throw new RuntimeException(e.getMessage());
+        } finally {
+            //delete interpreter instance (safer)
+            try {
+                Ghostscript.deleteInstance();
+            } catch (GhostscriptException e) {
+                //nothing
+            }
+        }
+    }
+
+    static String getMessage(String message) {
+        if (message.contains("library 'gs") || message.contains("ghost4j")) {
+            return message + GS_INSTALL;
+        }
+        return message;
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/PdfUtilities.java

@@ -0,0 +1,163 @@
+/**
+ * Copyright @ 2009 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * PDF utilities based on Ghostscript or PDFBox with Ghostscript as default. If
+ * Ghostscript is not available on the system, then PDFBox is used. Call
+ * <code>System.setProperty(PDF_LIBRARY, PDFBOX);</code> to set PDFBox as
+ * default.
+ */
+public class PdfUtilities {
+
+    public static final String PDF_LIBRARY = "pdf.library";
+    public static final String PDFBOX = "pdfbox";
+
+    /**
+     * Converts PDF to TIFF format.
+     *
+     * @param inputPdfFile input file
+     * @return a multi-page TIFF image
+     * @throws IOException
+     */
+    public static File convertPdf2Tiff(File inputPdfFile) throws IOException {
+        if (PDFBOX.equals(System.getProperty(PDF_LIBRARY))) {
+            return PdfBoxUtilities.convertPdf2Tiff(inputPdfFile);
+        } else {
+            try {
+                return PdfGsUtilities.convertPdf2Tiff(inputPdfFile);
+            } catch (Exception e) {
+                System.setProperty(PDF_LIBRARY, PDFBOX);
+                return convertPdf2Tiff(inputPdfFile);
+            }
+        }
+    }
+
+    /**
+     * Converts PDF to PNG format.
+     *
+     * @param inputPdfFile input file
+     * @return an array of PNG images
+     * @throws java.io.IOException
+     */
+    public static File[] convertPdf2Png(File inputPdfFile) throws IOException {
+        if (PDFBOX.equals(System.getProperty(PDF_LIBRARY))) {
+            return PdfBoxUtilities.convertPdf2Png(inputPdfFile);
+        } else {
+            try {
+                return PdfGsUtilities.convertPdf2Png(inputPdfFile);
+            } catch (Exception e) {
+                System.setProperty(PDF_LIBRARY, PDFBOX);
+                return convertPdf2Png(inputPdfFile);
+            }
+        }
+    }
+
+    /**
+     * Splits PDF.
+     *
+     * @deprecated As of Release 3.0.
+     *
+     * @param inputPdfFile input file
+     * @param outputPdfFile output file
+     * @param firstPage begin page
+     * @param lastPage end page
+     */
+    public static void splitPdf(String inputPdfFile, String outputPdfFile, String firstPage, String lastPage) {
+        if (firstPage.trim().isEmpty()) {
+            firstPage = "0";
+        }
+        if (lastPage.trim().isEmpty()) {
+            lastPage = "0";
+        }
+
+        splitPdf(new File(inputPdfFile), new File(outputPdfFile), Integer.parseInt(firstPage), Integer.parseInt(lastPage));
+    }
+
+    /**
+     * Splits PDF.
+     *
+     * @param inputPdfFile input file
+     * @param outputPdfFile output file
+     * @param firstPage begin page
+     * @param lastPage end page
+     */
+    public static void splitPdf(File inputPdfFile, File outputPdfFile, int firstPage, int lastPage) {
+        if (PDFBOX.equals(System.getProperty(PDF_LIBRARY))) {
+            PdfBoxUtilities.splitPdf(inputPdfFile, outputPdfFile, firstPage, lastPage);
+        } else {
+            try {
+                PdfGsUtilities.splitPdf(inputPdfFile, outputPdfFile, firstPage, lastPage);
+            } catch (Exception e) {
+                System.setProperty(PDF_LIBRARY, PDFBOX);
+                splitPdf(inputPdfFile, outputPdfFile, firstPage, lastPage);
+            }
+        }
+    }
+
+    /**
+     * Gets PDF Page Count.
+     *
+     * @deprecated As of Release 3.0.
+     *
+     * @param inputPdfFile input file
+     * @return number of pages
+     */
+    public static int getPdfPageCount(String inputPdfFile) {
+        return getPdfPageCount(new File(inputPdfFile));
+    }
+
+    /**
+     * Gets PDF Page Count.
+     *
+     * @param inputPdfFile input file
+     * @return number of pages
+     */
+    public static int getPdfPageCount(File inputPdfFile) {
+        if (PDFBOX.equals(System.getProperty(PDF_LIBRARY))) {
+            return PdfBoxUtilities.getPdfPageCount(inputPdfFile);
+        } else {
+            try {
+                return PdfGsUtilities.getPdfPageCount(inputPdfFile);
+            } catch (Exception e) {
+                System.setProperty(PDF_LIBRARY, PDFBOX);
+                return getPdfPageCount(inputPdfFile);
+            }
+        }
+    }
+
+    /**
+     * Merges PDF files.
+     *
+     * @param inputPdfFiles array of input files
+     * @param outputPdfFile output file
+     */
+    public static void mergePdf(File[] inputPdfFiles, File outputPdfFile) {
+        if (PDFBOX.equals(System.getProperty(PDF_LIBRARY))) {
+            PdfBoxUtilities.mergePdf(inputPdfFiles, outputPdfFile);
+        } else {
+            try {
+                PdfGsUtilities.mergePdf(inputPdfFiles, outputPdfFile);
+            } catch (Exception e) {
+                System.setProperty(PDF_LIBRARY, PDFBOX);
+                mergePdf(inputPdfFiles, outputPdfFile);
+            }
+        }
+    }
+}

Tess4J/src/net/sourceforge/tess4j/util/Utils.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright @ 2013 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+public class Utils {
+
+    /**
+     * Writes byte array to file.
+     *
+     * @param data byte array
+     * @param outFile output file
+     * @throws IOException
+     */
+    public static void writeFile(byte[] data, File outFile) throws IOException {
+        FileOutputStream fos = null;
+
+        try {
+            // create parent dirs when necessary
+            if (outFile.getParentFile() != null) {
+                outFile.getParentFile().mkdirs();
+            }
+
+            fos = new FileOutputStream(outFile);
+            fos.write(data);
+        } finally {
+            if (fos != null) {
+                fos.close();
+            }
+        }
+    }
+
+    /**
+     * Gets user-friendly name of the public static final constant defined in a
+     * class or an interface for display purpose.
+     *
+     * @param value the constant value
+     * @param c type of class or interface
+     * @return name
+     */
+    public static String getConstantName(Object value, Class c) {
+        for (Field f : c.getDeclaredFields()) {
+            int mod = f.getModifiers();
+            if (Modifier.isStatic(mod) && Modifier.isPublic(mod) && Modifier.isFinal(mod)) {
+                try {
+                    if (f.get(null).equals(value)) {
+                        return f.getName();
+                    }
+                } catch (IllegalAccessException e) {
+                    return String.valueOf(value);
+                }
+            }
+        }
+        return String.valueOf(value);
+    }
+}

Tess4J/tessdata/configs/api_config

@@ -0,0 +1 @@
+tessedit_zero_rejection T

Tess4J/tessdata/configs/digits

@@ -0,0 +1 @@
+tessedit_char_whitelist 0123456789-.

Tess4J/tessdata/configs/hocr

@@ -0,0 +1 @@
+tessedit_create_hocr 1

Tess4J/tessdata/pdf.ttx

@@ -0,0 +1,793 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="2.4">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="glyph00001"/>
+    <GlyphID id="2" name="glyph00002"/>
+    <GlyphID id="3" name="glyph00003"/>
+    <GlyphID id="4" name="glyph00004"/>
+    <GlyphID id="5" name="glyph00005"/>
+    <GlyphID id="6" name="glyph00006"/>
+    <GlyphID id="7" name="glyph00007"/>
+    <GlyphID id="8" name="glyph00008"/>
+    <GlyphID id="9" name="glyph00009"/>
+    <GlyphID id="10" name="glyph00010"/>
+    <GlyphID id="11" name="glyph00011"/>
+    <GlyphID id="12" name="glyph00012"/>
+    <GlyphID id="13" name="glyph00013"/>
+    <GlyphID id="14" name="glyph00014"/>
+    <GlyphID id="15" name="glyph00015"/>
+    <GlyphID id="16" name="glyph00016"/>
+    <GlyphID id="17" name="glyph00017"/>
+    <GlyphID id="18" name="glyph00018"/>
+    <GlyphID id="19" name="glyph00019"/>
+    <GlyphID id="20" name="glyph00020"/>
+    <GlyphID id="21" name="glyph00021"/>
+    <GlyphID id="22" name="glyph00022"/>
+    <GlyphID id="23" name="glyph00023"/>
+    <GlyphID id="24" name="glyph00024"/>
+    <GlyphID id="25" name="glyph00025"/>
+    <GlyphID id="26" name="glyph00026"/>
+    <GlyphID id="27" name="glyph00027"/>
+    <GlyphID id="28" name="glyph00028"/>
+    <GlyphID id="29" name="glyph00029"/>
+    <GlyphID id="30" name="glyph00030"/>
+    <GlyphID id="31" name="glyph00031"/>
+    <GlyphID id="32" name="glyph00032"/>
+    <GlyphID id="33" name="glyph00033"/>
+    <GlyphID id="34" name="glyph00034"/>
+    <GlyphID id="35" name="glyph00035"/>
+    <GlyphID id="36" name="glyph00036"/>
+    <GlyphID id="37" name="glyph00037"/>
+    <GlyphID id="38" name="glyph00038"/>
+    <GlyphID id="39" name="glyph00039"/>
+    <GlyphID id="40" name="glyph00040"/>
+    <GlyphID id="41" name="glyph00041"/>
+    <GlyphID id="42" name="glyph00042"/>
+    <GlyphID id="43" name="glyph00043"/>
+    <GlyphID id="44" name="glyph00044"/>
+    <GlyphID id="45" name="glyph00045"/>
+    <GlyphID id="46" name="glyph00046"/>
+    <GlyphID id="47" name="glyph00047"/>
+    <GlyphID id="48" name="glyph00048"/>
+    <GlyphID id="49" name="glyph00049"/>
+    <GlyphID id="50" name="glyph00050"/>
+    <GlyphID id="51" name="glyph00051"/>
+    <GlyphID id="52" name="glyph00052"/>
+    <GlyphID id="53" name="glyph00053"/>
+    <GlyphID id="54" name="glyph00054"/>
+    <GlyphID id="55" name="glyph00055"/>
+    <GlyphID id="56" name="glyph00056"/>
+    <GlyphID id="57" name="glyph00057"/>
+    <GlyphID id="58" name="glyph00058"/>
+    <GlyphID id="59" name="glyph00059"/>
+    <GlyphID id="60" name="glyph00060"/>
+    <GlyphID id="61" name="glyph00061"/>
+    <GlyphID id="62" name="glyph00062"/>
+    <GlyphID id="63" name="glyph00063"/>
+    <GlyphID id="64" name="glyph00064"/>
+    <GlyphID id="65" name="glyph00065"/>
+    <GlyphID id="66" name="glyph00066"/>
+    <GlyphID id="67" name="glyph00067"/>
+    <GlyphID id="68" name="glyph00068"/>
+    <GlyphID id="69" name="glyph00069"/>
+    <GlyphID id="70" name="glyph00070"/>
+    <GlyphID id="71" name="glyph00071"/>
+    <GlyphID id="72" name="glyph00072"/>
+    <GlyphID id="73" name="glyph00073"/>
+    <GlyphID id="74" name="glyph00074"/>
+    <GlyphID id="75" name="glyph00075"/>
+    <GlyphID id="76" name="glyph00076"/>
+    <GlyphID id="77" name="glyph00077"/>
+    <GlyphID id="78" name="glyph00078"/>
+    <GlyphID id="79" name="glyph00079"/>
+    <GlyphID id="80" name="glyph00080"/>
+    <GlyphID id="81" name="glyph00081"/>
+    <GlyphID id="82" name="glyph00082"/>
+    <GlyphID id="83" name="glyph00083"/>
+    <GlyphID id="84" name="glyph00084"/>
+    <GlyphID id="85" name="glyph00085"/>
+    <GlyphID id="86" name="glyph00086"/>
+    <GlyphID id="87" name="glyph00087"/>
+    <GlyphID id="88" name="glyph00088"/>
+    <GlyphID id="89" name="glyph00089"/>
+    <GlyphID id="90" name="glyph00090"/>
+    <GlyphID id="91" name="glyph00091"/>
+    <GlyphID id="92" name="glyph00092"/>
+    <GlyphID id="93" name="glyph00093"/>
+    <GlyphID id="94" name="glyph00094"/>
+    <GlyphID id="95" name="glyph00095"/>
+    <GlyphID id="96" name="glyph00096"/>
+    <GlyphID id="97" name="glyph00097"/>
+    <GlyphID id="98" name="glyph00098"/>
+    <GlyphID id="99" name="glyph00099"/>
+    <GlyphID id="100" name="glyph00100"/>
+    <GlyphID id="101" name="glyph00101"/>
+    <GlyphID id="102" name="glyph00102"/>
+    <GlyphID id="103" name="glyph00103"/>
+    <GlyphID id="104" name="glyph00104"/>
+    <GlyphID id="105" name="glyph00105"/>
+    <GlyphID id="106" name="glyph00106"/>
+    <GlyphID id="107" name="glyph00107"/>
+    <GlyphID id="108" name="glyph00108"/>
+    <GlyphID id="109" name="glyph00109"/>
+    <GlyphID id="110" name="glyph00110"/>
+    <GlyphID id="111" name="glyph00111"/>
+    <GlyphID id="112" name="glyph00112"/>
+    <GlyphID id="113" name="glyph00113"/>
+    <GlyphID id="114" name="glyph00114"/>
+    <GlyphID id="115" name="glyph00115"/>
+    <GlyphID id="116" name="glyph00116"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="2.31999206543"/>
+    <checkSumAdjustment value="0xd4fdc458"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00011111"/>
+    <unitsPerEm value="2048"/>
+    <created value="Fri Sep 10 06:45:17 2010"/>
+    <modified value="Fri Sep 10 06:45:17 2010"/>
+    <xMin value="0"/>
+    <yMin value="0"/>
+    <xMax value="1000"/>
+    <yMax value="1000"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="8"/>
+    <fontDirectionHint value="0"/>
+    <indexToLocFormat value="1"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="1.0"/>
+    <ascent value="1000"/>
+    <descent value="0"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="3554"/>
+    <minLeftSideBearing value="-2090"/>
+    <minRightSideBearing value="-1455"/>
+    <xMaxExtent value="3442"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="117"/>
+  </hhea>
+
+  <maxp>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="0x10000"/>
+    <numGlyphs value="117"/>
+    <maxPoints value="852"/>
+    <maxContours value="43"/>
+    <maxCompositePoints value="104"/>
+    <maxCompositeContours value="12"/>
+    <maxZones value="2"/>
+    <maxTwilightPoints value="16"/>
+    <maxStorage value="153"/>
+    <maxFunctionDefs value="8"/>
+    <maxInstructionDefs value="0"/>
+    <maxStackElements value="1045"/>
+    <maxSizeOfInstructions value="534"/>
+    <maxComponentElements value="8"/>
+    <maxComponentDepth value="4"/>
+  </maxp>
+
+  <hmtx>
+    <mtx name=".notdef" width="1000" lsb="0"/>
+    <mtx name="glyph00001" width="1000" lsb="0"/>
+    <mtx name="glyph00002" width="1000" lsb="0"/>
+    <mtx name="glyph00003" width="1000" lsb="0"/>
+    <mtx name="glyph00004" width="1000" lsb="0"/>
+    <mtx name="glyph00005" width="1000" lsb="0"/>
+    <mtx name="glyph00006" width="1000" lsb="0"/>
+    <mtx name="glyph00007" width="1000" lsb="0"/>
+    <mtx name="glyph00008" width="1000" lsb="0"/>
+    <mtx name="glyph00009" width="1000" lsb="0"/>
+    <mtx name="glyph00010" width="1000" lsb="0"/>
+    <mtx name="glyph00011" width="1000" lsb="0"/>
+    <mtx name="glyph00012" width="1000" lsb="0"/>
+    <mtx name="glyph00013" width="1000" lsb="0"/>
+    <mtx name="glyph00014" width="1000" lsb="0"/>
+    <mtx name="glyph00015" width="1000" lsb="0"/>
+    <mtx name="glyph00016" width="1000" lsb="0"/>
+    <mtx name="glyph00017" width="1000" lsb="0"/>
+    <mtx name="glyph00018" width="1000" lsb="0"/>
+    <mtx name="glyph00019" width="1000" lsb="0"/>
+    <mtx name="glyph00020" width="1000" lsb="0"/>
+    <mtx name="glyph00021" width="1000" lsb="0"/>
+    <mtx name="glyph00022" width="1000" lsb="0"/>
+    <mtx name="glyph00023" width="1000" lsb="0"/>
+    <mtx name="glyph00024" width="1000" lsb="0"/>
+    <mtx name="glyph00025" width="1000" lsb="0"/>
+    <mtx name="glyph00026" width="1000" lsb="0"/>
+    <mtx name="glyph00027" width="1000" lsb="0"/>
+    <mtx name="glyph00028" width="1000" lsb="0"/>
+    <mtx name="glyph00029" width="1000" lsb="0"/>
+    <mtx name="glyph00030" width="1000" lsb="0"/>
+    <mtx name="glyph00031" width="1000" lsb="0"/>
+    <mtx name="glyph00032" width="1000" lsb="0"/>
+    <mtx name="glyph00033" width="1000" lsb="0"/>
+    <mtx name="glyph00034" width="1000" lsb="0"/>
+    <mtx name="glyph00035" width="1000" lsb="0"/>
+    <mtx name="glyph00036" width="1000" lsb="0"/>
+    <mtx name="glyph00037" width="1000" lsb="0"/>
+    <mtx name="glyph00038" width="1000" lsb="0"/>
+    <mtx name="glyph00039" width="1000" lsb="0"/>
+    <mtx name="glyph00040" width="1000" lsb="0"/>
+    <mtx name="glyph00041" width="1000" lsb="0"/>
+    <mtx name="glyph00042" width="1000" lsb="0"/>
+    <mtx name="glyph00043" width="1000" lsb="0"/>
+    <mtx name="glyph00044" width="1000" lsb="0"/>
+    <mtx name="glyph00045" width="1000" lsb="0"/>
+    <mtx name="glyph00046" width="1000" lsb="0"/>
+    <mtx name="glyph00047" width="1000" lsb="0"/>
+    <mtx name="glyph00048" width="1000" lsb="0"/>
+    <mtx name="glyph00049" width="1000" lsb="0"/>
+    <mtx name="glyph00050" width="1000" lsb="0"/>
+    <mtx name="glyph00051" width="1000" lsb="0"/>
+    <mtx name="glyph00052" width="1000" lsb="0"/>
+    <mtx name="glyph00053" width="1000" lsb="0"/>
+    <mtx name="glyph00054" width="1000" lsb="0"/>
+    <mtx name="glyph00055" width="1000" lsb="0"/>
+    <mtx name="glyph00056" width="1000" lsb="0"/>
+    <mtx name="glyph00057" width="1000" lsb="0"/>
+    <mtx name="glyph00058" width="1000" lsb="0"/>
+    <mtx name="glyph00059" width="1000" lsb="0"/>
+    <mtx name="glyph00060" width="1000" lsb="0"/>
+    <mtx name="glyph00061" width="1000" lsb="0"/>
+    <mtx name="glyph00062" width="1000" lsb="0"/>
+    <mtx name="glyph00063" width="1000" lsb="0"/>
+    <mtx name="glyph00064" width="1000" lsb="0"/>
+    <mtx name="glyph00065" width="1000" lsb="0"/>
+    <mtx name="glyph00066" width="1000" lsb="0"/>
+    <mtx name="glyph00067" width="1000" lsb="0"/>
+    <mtx name="glyph00068" width="1000" lsb="0"/>
+    <mtx name="glyph00069" width="1000" lsb="0"/>
+    <mtx name="glyph00070" width="1000" lsb="0"/>
+    <mtx name="glyph00071" width="1000" lsb="0"/>
+    <mtx name="glyph00072" width="1000" lsb="0"/>
+    <mtx name="glyph00073" width="1000" lsb="0"/>
+    <mtx name="glyph00074" width="1000" lsb="0"/>
+    <mtx name="glyph00075" width="1000" lsb="0"/>
+    <mtx name="glyph00076" width="1000" lsb="0"/>
+    <mtx name="glyph00077" width="1000" lsb="0"/>
+    <mtx name="glyph00078" width="1000" lsb="0"/>
+    <mtx name="glyph00079" width="1000" lsb="0"/>
+    <mtx name="glyph00080" width="1000" lsb="0"/>
+    <mtx name="glyph00081" width="1000" lsb="0"/>
+    <mtx name="glyph00082" width="1000" lsb="0"/>
+    <mtx name="glyph00083" width="1000" lsb="0"/>
+    <mtx name="glyph00084" width="1000" lsb="0"/>
+    <mtx name="glyph00085" width="1000" lsb="0"/>
+    <mtx name="glyph00086" width="1000" lsb="0"/>
+    <mtx name="glyph00087" width="1000" lsb="0"/>
+    <mtx name="glyph00088" width="1000" lsb="0"/>
+    <mtx name="glyph00089" width="1000" lsb="0"/>
+    <mtx name="glyph00090" width="1000" lsb="0"/>
+    <mtx name="glyph00091" width="1000" lsb="0"/>
+    <mtx name="glyph00092" width="1000" lsb="0"/>
+    <mtx name="glyph00093" width="1000" lsb="0"/>
+    <mtx name="glyph00094" width="1000" lsb="0"/>
+    <mtx name="glyph00095" width="1000" lsb="0"/>
+    <mtx name="glyph00096" width="1000" lsb="0"/>
+    <mtx name="glyph00097" width="1000" lsb="0"/>
+    <mtx name="glyph00098" width="1000" lsb="0"/>
+    <mtx name="glyph00099" width="1000" lsb="0"/>
+    <mtx name="glyph00100" width="1000" lsb="0"/>
+    <mtx name="glyph00101" width="1000" lsb="0"/>
+    <mtx name="glyph00102" width="1000" lsb="0"/>
+    <mtx name="glyph00103" width="1000" lsb="0"/>
+    <mtx name="glyph00104" width="1000" lsb="0"/>
+    <mtx name="glyph00105" width="1000" lsb="0"/>
+    <mtx name="glyph00106" width="1000" lsb="0"/>
+    <mtx name="glyph00107" width="1000" lsb="0"/>
+    <mtx name="glyph00108" width="1000" lsb="0"/>
+    <mtx name="glyph00109" width="1000" lsb="0"/>
+    <mtx name="glyph00110" width="1000" lsb="0"/>
+    <mtx name="glyph00111" width="1000" lsb="0"/>
+    <mtx name="glyph00112" width="1000" lsb="0"/>
+    <mtx name="glyph00113" width="1000" lsb="0"/>
+    <mtx name="glyph00114" width="1000" lsb="0"/>
+    <mtx name="glyph00115" width="1000" lsb="0"/>
+    <mtx name="glyph00116" width="1000" lsb="0"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="3" platEncID="0" language="0">
+      <map code="0xf000" name=".notdef"/>
+      <map code="0xf001" name="glyph00001"/>
+      <map code="0xf002" name="glyph00002"/>
+      <map code="0xf003" name="glyph00003"/>
+      <map code="0xf004" name="glyph00004"/>
+      <map code="0xf005" name="glyph00005"/>
+      <map code="0xf006" name="glyph00006"/>
+      <map code="0xf007" name="glyph00007"/>
+      <map code="0xf008" name="glyph00008"/>
+      <map code="0xf009" name="glyph00009"/>
+      <map code="0xf00a" name="glyph00010"/>
+      <map code="0xf00b" name="glyph00011"/>
+      <map code="0xf00c" name="glyph00012"/>
+      <map code="0xf00d" name="glyph00013"/>
+      <map code="0xf00e" name="glyph00014"/>
+      <map code="0xf00f" name="glyph00015"/>
+      <map code="0xf010" name="glyph00016"/>
+      <map code="0xf011" name="glyph00017"/>
+      <map code="0xf012" name="glyph00018"/>
+      <map code="0xf013" name="glyph00019"/>
+      <map code="0xf014" name="glyph00020"/>
+      <map code="0xf015" name="glyph00021"/>
+      <map code="0xf016" name="glyph00022"/>
+      <map code="0xf017" name="glyph00023"/>
+      <map code="0xf018" name="glyph00024"/>
+      <map code="0xf019" name="glyph00025"/>
+      <map code="0xf01a" name="glyph00026"/>
+      <map code="0xf01b" name="glyph00027"/>
+      <map code="0xf01c" name="glyph00028"/>
+      <map code="0xf01d" name="glyph00029"/>
+      <map code="0xf01e" name="glyph00030"/>
+      <map code="0xf01f" name="glyph00031"/>
+      <map code="0xf020" name="glyph00032"/>
+      <map code="0xf021" name="glyph00033"/>
+      <map code="0xf022" name="glyph00034"/>
+      <map code="0xf023" name="glyph00035"/>
+      <map code="0xf024" name="glyph00036"/>
+      <map code="0xf025" name="glyph00037"/>
+      <map code="0xf026" name="glyph00038"/>
+      <map code="0xf027" name="glyph00039"/>
+      <map code="0xf028" name="glyph00040"/>
+      <map code="0xf029" name="glyph00041"/>
+      <map code="0xf02a" name="glyph00042"/>
+      <map code="0xf02b" name="glyph00043"/>
+      <map code="0xf02c" name="glyph00044"/>
+      <map code="0xf02d" name="glyph00045"/>
+      <map code="0xf02e" name="glyph00046"/>
+      <map code="0xf02f" name="glyph00047"/>
+      <map code="0xf030" name="glyph00048"/>
+      <map code="0xf031" name="glyph00049"/>
+      <map code="0xf032" name="glyph00050"/>
+      <map code="0xf033" name="glyph00051"/>
+      <map code="0xf034" name="glyph00052"/>
+      <map code="0xf035" name="glyph00053"/>
+      <map code="0xf036" name="glyph00054"/>
+      <map code="0xf037" name="glyph00055"/>
+      <map code="0xf038" name="glyph00056"/>
+      <map code="0xf039" name="glyph00057"/>
+      <map code="0xf03a" name="glyph00058"/>
+      <map code="0xf03b" name="glyph00059"/>
+      <map code="0xf03c" name="glyph00060"/>
+      <map code="0xf03d" name="glyph00061"/>
+      <map code="0xf03e" name="glyph00062"/>
+      <map code="0xf03f" name="glyph00063"/>
+      <map code="0xf040" name="glyph00064"/>
+      <map code="0xf041" name="glyph00065"/>
+      <map code="0xf042" name="glyph00066"/>
+      <map code="0xf043" name="glyph00067"/>
+      <map code="0xf044" name="glyph00068"/>
+      <map code="0xf045" name="glyph00069"/>
+      <map code="0xf046" name="glyph00070"/>
+      <map code="0xf047" name="glyph00071"/>
+      <map code="0xf048" name="glyph00072"/>
+      <map code="0xf049" name="glyph00073"/>
+      <map code="0xf04a" name="glyph00074"/>
+      <map code="0xf04b" name="glyph00075"/>
+      <map code="0xf04c" name="glyph00076"/>
+      <map code="0xf04d" name="glyph00077"/>
+      <map code="0xf04e" name="glyph00078"/>
+      <map code="0xf04f" name="glyph00079"/>
+      <map code="0xf050" name="glyph00080"/>
+      <map code="0xf051" name="glyph00081"/>
+      <map code="0xf052" name="glyph00082"/>
+      <map code="0xf053" name="glyph00083"/>
+      <map code="0xf054" name="glyph00084"/>
+      <map code="0xf055" name="glyph00085"/>
+      <map code="0xf056" name="glyph00086"/>
+      <map code="0xf057" name="glyph00087"/>
+      <map code="0xf058" name="glyph00088"/>
+      <map code="0xf059" name="glyph00089"/>
+      <map code="0xf05a" name="glyph00090"/>
+      <map code="0xf05b" name="glyph00091"/>
+      <map code="0xf05c" name="glyph00092"/>
+      <map code="0xf05d" name="glyph00093"/>
+      <map code="0xf05e" name="glyph00094"/>
+      <map code="0xf05f" name="glyph00095"/>
+      <map code="0xf060" name="glyph00096"/>
+      <map code="0xf061" name="glyph00097"/>
+      <map code="0xf062" name="glyph00098"/>
+      <map code="0xf063" name="glyph00099"/>
+      <map code="0xf064" name="glyph00100"/>
+      <map code="0xf065" name="glyph00101"/>
+      <map code="0xf066" name="glyph00102"/>
+      <map code="0xf067" name="glyph00103"/>
+      <map code="0xf068" name="glyph00104"/>
+      <map code="0xf069" name="glyph00105"/>
+      <map code="0xf06a" name="glyph00106"/>
+      <map code="0xf06b" name="glyph00107"/>
+      <map code="0xf06c" name="glyph00108"/>
+      <map code="0xf06d" name="glyph00109"/>
+      <map code="0xf06e" name="glyph00110"/>
+      <map code="0xf06f" name="glyph00111"/>
+      <map code="0xf070" name="glyph00112"/>
+      <map code="0xf071" name="glyph00113"/>
+      <map code="0xf072" name="glyph00114"/>
+      <map code="0xf073" name="glyph00115"/>
+      <map code="0xf074" name="glyph00116"/>
+    </cmap_format_4>
+    <cmap_format_6 platformID="1" platEncID="0" language="0">
+      <map code="0x0" name=".notdef"/>
+      <map code="0x1" name="glyph00001"/>
+      <map code="0x2" name="glyph00002"/>
+      <map code="0x3" name="glyph00003"/>
+      <map code="0x4" name="glyph00004"/>
+      <map code="0x5" name="glyph00005"/>
+      <map code="0x6" name="glyph00006"/>
+      <map code="0x7" name="glyph00007"/>
+      <map code="0x8" name="glyph00008"/>
+      <map code="0x9" name="glyph00009"/>
+      <map code="0xa" name="glyph00010"/>
+      <map code="0xb" name="glyph00011"/>
+      <map code="0xc" name="glyph00012"/>
+      <map code="0xd" name="glyph00013"/>
+      <map code="0xe" name="glyph00014"/>
+      <map code="0xf" name="glyph00015"/>
+      <map code="0x10" name="glyph00016"/>
+      <map code="0x11" name="glyph00017"/>
+      <map code="0x12" name="glyph00018"/>
+      <map code="0x13" name="glyph00019"/>
+      <map code="0x14" name="glyph00020"/>
+      <map code="0x15" name="glyph00021"/>
+      <map code="0x16" name="glyph00022"/>
+      <map code="0x17" name="glyph00023"/>
+      <map code="0x18" name="glyph00024"/>
+      <map code="0x19" name="glyph00025"/>
+      <map code="0x1a" name="glyph00026"/>
+      <map code="0x1b" name="glyph00027"/>
+      <map code="0x1c" name="glyph00028"/>
+      <map code="0x1d" name="glyph00029"/>
+      <map code="0x1e" name="glyph00030"/>
+      <map code="0x1f" name="glyph00031"/>
+      <map code="0x20" name="glyph00032"/>
+      <map code="0x21" name="glyph00033"/>
+      <map code="0x22" name="glyph00034"/>
+      <map code="0x23" name="glyph00035"/>
+      <map code="0x24" name="glyph00036"/>
+      <map code="0x25" name="glyph00037"/>
+      <map code="0x26" name="glyph00038"/>
+      <map code="0x27" name="glyph00039"/>
+      <map code="0x28" name="glyph00040"/>
+      <map code="0x29" name="glyph00041"/>
+      <map code="0x2a" name="glyph00042"/>
+      <map code="0x2b" name="glyph00043"/>
+      <map code="0x2c" name="glyph00044"/>
+      <map code="0x2d" name="glyph00045"/>
+      <map code="0x2e" name="glyph00046"/>
+      <map code="0x2f" name="glyph00047"/>
+      <map code="0x30" name="glyph00048"/>
+      <map code="0x31" name="glyph00049"/>
+      <map code="0x32" name="glyph00050"/>
+      <map code="0x33" name="glyph00051"/>
+      <map code="0x34" name="glyph00052"/>
+      <map code="0x35" name="glyph00053"/>
+      <map code="0x36" name="glyph00054"/>
+      <map code="0x37" name="glyph00055"/>
+      <map code="0x38" name="glyph00056"/>
+      <map code="0x39" name="glyph00057"/>
+      <map code="0x3a" name="glyph00058"/>
+      <map code="0x3b" name="glyph00059"/>
+      <map code="0x3c" name="glyph00060"/>
+      <map code="0x3d" name="glyph00061"/>
+      <map code="0x3e" name="glyph00062"/>
+      <map code="0x3f" name="glyph00063"/>
+      <map code="0x40" name="glyph00064"/>
+      <map code="0x41" name="glyph00065"/>
+      <map code="0x42" name="glyph00066"/>
+      <map code="0x43" name="glyph00067"/>
+      <map code="0x44" name="glyph00068"/>
+      <map code="0x45" name="glyph00069"/>
+      <map code="0x46" name="glyph00070"/>
+      <map code="0x47" name="glyph00071"/>
+      <map code="0x48" name="glyph00072"/>
+      <map code="0x49" name="glyph00073"/>
+      <map code="0x4a" name="glyph00074"/>
+      <map code="0x4b" name="glyph00075"/>
+      <map code="0x4c" name="glyph00076"/>
+      <map code="0x4d" name="glyph00077"/>
+      <map code="0x4e" name="glyph00078"/>
+      <map code="0x4f" name="glyph00079"/>
+      <map code="0x50" name="glyph00080"/>
+      <map code="0x51" name="glyph00081"/>
+      <map code="0x52" name="glyph00082"/>
+      <map code="0x53" name="glyph00083"/>
+      <map code="0x54" name="glyph00084"/>
+      <map code="0x55" name="glyph00085"/>
+      <map code="0x56" name="glyph00086"/>
+      <map code="0x57" name="glyph00087"/>
+      <map code="0x58" name="glyph00088"/>
+      <map code="0x59" name="glyph00089"/>
+      <map code="0x5a" name="glyph00090"/>
+      <map code="0x5b" name="glyph00091"/>
+      <map code="0x5c" name="glyph00092"/>
+      <map code="0x5d" name="glyph00093"/>
+      <map code="0x5e" name="glyph00094"/>
+      <map code="0x5f" name="glyph00095"/>
+      <map code="0x60" name="glyph00096"/>
+      <map code="0x61" name="glyph00097"/>
+      <map code="0x62" name="glyph00098"/>
+      <map code="0x63" name="glyph00099"/>
+      <map code="0x64" name="glyph00100"/>
+      <map code="0x65" name="glyph00101"/>
+      <map code="0x66" name="glyph00102"/>
+      <map code="0x67" name="glyph00103"/>
+      <map code="0x68" name="glyph00104"/>
+      <map code="0x69" name="glyph00105"/>
+      <map code="0x6a" name="glyph00106"/>
+      <map code="0x6b" name="glyph00107"/>
+      <map code="0x6c" name="glyph00108"/>
+      <map code="0x6d" name="glyph00109"/>
+      <map code="0x6e" name="glyph00110"/>
+      <map code="0x6f" name="glyph00111"/>
+      <map code="0x70" name="glyph00112"/>
+      <map code="0x71" name="glyph00113"/>
+      <map code="0x72" name="glyph00114"/>
+      <map code="0x73" name="glyph00115"/>
+      <map code="0x74" name="glyph00116"/>
+    </cmap_format_6>
+  </cmap>
+
+  <loca>
+    <!-- The 'loca' table will be calculated by the compiler -->
+  </loca>
+
+  <glyf>
+    <!-- The xMin, yMin, xMax and yMax values
+         will be recalculated by the compiler. -->
+    <TTGlyph name=".notdef" xMin="0" yMin="0" xMax="1000" yMax="1000">
+      <contour>
+      </contour>
+      <instructions><assembly>
+        </assembly></instructions>
+    </TTGlyph>
+    <TTGlyph name="glyph00001" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00002" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00003" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00004" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00005" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00006" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00007" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00008" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00009" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00010" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00011" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00012" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00013" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00014" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00015" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00016" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00017" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00018" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00019" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00020" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00021" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00022" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00023" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00024" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00025" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00026" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00027" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00028" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00029" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00030" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00031" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00032" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00033" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00034" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00035" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00036" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00037" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00038" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00039" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00040" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00041" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00042" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00043" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00044" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00045" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00046" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00047" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00048" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00049" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00050" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00051" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00052" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00053" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00054" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00055" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00056" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00057" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00058" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00059" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00060" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00061" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00062" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00063" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00064" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00065" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00066" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00067" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00068" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00069" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00070" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00071" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00072" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00073" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00074" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00075" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00076" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00077" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00078" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00079" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00080" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00081" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00082" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00083" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00084" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00085" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00086" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00087" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00088" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00089" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00090" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00091" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00092" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00093" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00094" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00095" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00096" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00097" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00098" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00099" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00100" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00101" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00102" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00103" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00104" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00105" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00106" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00107" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00108" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00109" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00110" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00111" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00112" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00113" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00114" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00115" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+    <TTGlyph name="glyph00116" xMin="0" yMin="0" xMax="1000" yMax="1000">
+    </TTGlyph>
+  </glyf>
+</ttFont>

Tess4J/test/log4j.properties

@@ -0,0 +1,9 @@
+# Set root logger level to DEBUG and its only appender to A1.
+log4j.rootLogger=DEBUG, A1
+
+# A1 is set to be a ConsoleAppender.
+log4j.appender.A1=org.apache.log4j.ConsoleAppender
+
+# A1 uses PatternLayout.
+log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

Tess4J/test/net/sourceforge/tess4j/ProgressMonitor.java

@@ -0,0 +1,75 @@
+/**
+ * Copyright @ 2014 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import com.sun.jna.Pointer;
+import net.sourceforge.tess4j.util.LoggHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static net.sourceforge.tess4j.ITessAPI.TRUE;
+
+class ProgressMonitor extends Thread {
+
+    ITessAPI.ETEXT_DESC monitor;
+    StringBuilder outputMessage = new StringBuilder();
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    public ProgressMonitor(ITessAPI.ETEXT_DESC monitor) {
+        this.monitor = monitor;
+    }
+
+    public String getMessage() {
+        return outputMessage.toString();
+    }
+
+    @Override
+    public void run() {
+        try {
+            while (true) {
+                logger.info("ocr alive: " + (monitor.ocr_alive == TRUE));
+                logger.info("progress: " + monitor.progress);
+                outputMessage.append(monitor.more_to_come);
+                if (monitor.progress >= 100) {
+                    break;
+                }
+                Thread.sleep(100);
+            }
+        } catch (Exception ioe) {
+            ioe.printStackTrace();
+        }
+    }
+
+    /**
+     * Cancels OCR operation.
+     */
+    public void cancel() {
+        monitor.cancel = new ITessAPI.CANCEL_FUNC() {
+            @Override
+            public boolean invoke(Pointer cancel_this, int words) {
+                return true;
+            }
+        };
+    }
+
+    /**
+     * Resets cancel flag.
+     */
+    public void reset() {
+        monitor.cancel = null;
+    }
+}

Tess4J/test/net/sourceforge/tess4j/TessAPI1Test.java

@@ -0,0 +1,645 @@
+/**
+ * Copyright @ 2012 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import static org.junit.Assert.assertArrayEquals;
+
+import java.awt.image.BufferedImage;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileReader;
+import java.nio.ByteBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.util.Arrays;
+
+import javax.imageio.ImageIO;
+
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.Utils;
+import net.sourceforge.tess4j.util.ImageIOHelper;
+
+import com.ochafik.lang.jnaerator.runtime.NativeSize;
+import com.sun.jna.NativeLong;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import com.sun.jna.Pointer;
+import com.sun.jna.StringArray;
+import com.sun.jna.ptr.PointerByReference;
+import net.sourceforge.lept4j.Box;
+import net.sourceforge.lept4j.Boxa;
+import static net.sourceforge.lept4j.ILeptonica.L_CLONE;
+import net.sourceforge.lept4j.Leptonica;
+import net.sourceforge.lept4j.Leptonica1;
+import net.sourceforge.lept4j.Pix;
+import net.sourceforge.lept4j.util.LeptUtils;
+
+import net.sourceforge.tess4j.ITessAPI.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static net.sourceforge.tess4j.ITessAPI.FALSE;
+import static net.sourceforge.tess4j.ITessAPI.TRUE;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class TessAPI1Test {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    private final String datapath = ".";
+    private final String testResourcesDataPath = "test/resources/test-data";
+    String language = "eng";
+    String expOCRResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+
+    TessBaseAPI handle;
+
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws Exception {
+    }
+
+    @Before
+    public void setUp() {
+        handle = TessAPI1.TessBaseAPICreate();
+    }
+
+    @After
+    public void tearDown() {
+        TessAPI1.TessBaseAPIDelete(handle);
+    }
+
+    /**
+     * Test of TessBaseAPIRect method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIRect() throws Exception {
+        logger.info("TessBaseAPIRect");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(tiff); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        Pointer utf8Text = TessAPI1.TessBaseAPIRect(handle, buf, bytespp, bytespl, 0, 0, image.getWidth(), image.getHeight());
+        String result = utf8Text.getString(0);
+        TessAPI1.TessDeleteText(utf8Text);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of TessBaseAPIGetUTF8Text method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetUTF8Text() throws Exception {
+        logger.info("TessBaseAPIGetUTF8Text");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        TessAPI1.TessBaseAPISetRectangle(handle, 0, 0, 1024, 800);
+        Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
+        String result = utf8Text.getString(0);
+        TessAPI1.TessDeleteText(utf8Text);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of TessBaseAPIGetUTF8Text method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetUTF8Text_Pix() throws Exception {
+        logger.info("TessBaseAPIGetUTF8Text_Pix");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(tiff.getPath());
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage2(handle, pix);
+        Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
+        String result = utf8Text.getString(0);
+        TessAPI1.TessDeleteText(utf8Text);
+        logger.info(result);
+
+        //release Pix resource
+        PointerByReference pRef = new PointerByReference();
+        pRef.setValue(pix.getPointer());
+        leptInstance.pixDestroy(pRef);
+
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of TessBaseAPIGetComponentImages method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetComponentImages() throws Exception {
+        logger.info("TessBaseAPIGetComponentImages");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = 12; // number of lines in the test image
+        Pix pix = Leptonica1.pixRead(image.getPath());
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage2(handle, pix);
+        PointerByReference pixa = null;
+        PointerByReference blockids = null;
+        Boxa boxes = TessAPI1.TessBaseAPIGetComponentImages(handle, TessPageIteratorLevel.RIL_TEXTLINE, TRUE, pixa, blockids);
+//        boxes = TessAPI1.TessBaseAPIGetRegions(handle, pixa); // equivalent to TessPageIteratorLevel.RIL_BLOCK
+        int boxCount = Leptonica1.boxaGetCount(boxes);
+        for (int i = 0; i < boxCount; i++) {
+            Box box = Leptonica1.boxaGetBox(boxes, i, L_CLONE);
+            if (box == null) {
+                continue;
+            }
+            TessAPI1.TessBaseAPISetRectangle(handle, box.x, box.y, box.w, box.h);
+            Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
+            String ocrResult = utf8Text.getString(0);
+            TessAPI1.TessDeleteText(utf8Text);
+            int conf = TessAPI1.TessBaseAPIMeanTextConf(handle);
+            System.out.print(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d, confidence: %d, text: %s", i, box.x, box.y, box.w, box.h, conf, ocrResult));
+            LeptUtils.dispose(box);
+        }
+
+        // release Pix and Boxa resources
+        LeptUtils.dispose(pix);
+        LeptUtils.dispose(boxes);
+
+        assertEquals(expResult, boxCount);
+    }
+
+    /**
+     * Test of TessVersion method, of class TessAPI1.
+     */
+    @Test
+    public void testTessVersion() {
+        logger.info("TessVersion");
+        String expResult = "3.05.01";
+        String result = TessAPI1.TessVersion();
+        logger.info(result);
+        assertTrue(result.startsWith(expResult));
+    }
+
+    /**
+     * Test of TessBaseAPIGetBoolVariable method, of class TessAPI1.
+     */
+    @Test
+    public void testTessBaseAPIGetBoolVariable() {
+        logger.info("TessBaseAPIGetBoolVariable");
+        String name = "tessedit_create_hocr";
+        TessAPI1.TessBaseAPISetVariable(handle, name, "1");
+        IntBuffer value = IntBuffer.allocate(1);
+        int result = -1;
+        if (TessAPI1.TessBaseAPIGetBoolVariable(handle, "tessedit_create_hocr", value) == TRUE) {
+            result = value.get(0);
+        }
+        int expResult = 1;
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIPrintVariables method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIPrintVariablesToFile() throws Exception {
+        logger.info("TessBaseAPIPrintVariablesToFile");
+        String var = "tessedit_char_whitelist";
+        String value = "0123456789";
+        TessAPI1.TessBaseAPISetVariable(handle, var, value);
+        String filename = "printvar.txt";
+        TessAPI1.TessBaseAPIPrintVariablesToFile(handle, filename); // will crash if not invoked after some method
+        File file = new File(filename);
+        BufferedReader input = new BufferedReader(new FileReader(file));
+        StringBuilder strB = new StringBuilder();
+        String line;
+        String EOL = System.getProperty("line.separator");
+        while ((line = input.readLine()) != null) {
+            strB.append(line).append(EOL);
+        }
+        input.close();
+        file.delete();
+        assertTrue(strB.toString().contains(var + "\t" + value));
+    }
+
+    /**
+     * Test of TessBaseAPIInit4 method, of class TessAPI1.
+     */
+    @Test
+    public void testTessBaseAPIInit4() {
+        logger.info("TessBaseAPIInit4");
+        int oem = TessOcrEngineMode.OEM_DEFAULT;
+        PointerByReference configs = null;
+        int configs_size = 0;
+
+        // disable loading dictionaries
+        String[] args = new String[]{"load_system_dawg", "load_freq_dawg"};
+        StringArray sarray = new StringArray(args);
+        PointerByReference vars_vec = new PointerByReference();
+        vars_vec.setPointer(sarray);
+
+        args = new String[]{"F", "F"};
+        sarray = new StringArray(args);
+        PointerByReference vars_values = new PointerByReference();
+        vars_values.setPointer(sarray);
+
+        NativeSize vars_vec_size = new NativeSize(args.length);
+
+        int expResult = 0;
+        int result = TessAPI1.TessBaseAPIInit4(handle, datapath, language, oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, FALSE);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetInitLanguagesAsString method, of class TessAPI1.
+     */
+    @Test
+    public void testTessBaseAPIGetInitLanguagesAsString() {
+        logger.info("TessBaseAPIGetInitLanguagesAsString");
+        String expResult = "";
+        String result = TessAPI1.TessBaseAPIGetInitLanguagesAsString(handle);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetLoadedLanguagesAsVector method, of class TessAPI1.
+     */
+    @Test
+    public void testTessBaseAPIGetLoadedLanguagesAsVector() {
+        logger.info("TessBaseAPIGetLoadedLanguagesAsVector");
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        String[] expResult = {"eng"};
+        String[] result = TessAPI1.TessBaseAPIGetLoadedLanguagesAsVector(handle).getPointer().getStringArray(0);
+        assertArrayEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetAvailableLanguagesAsVector method, of class
+     * TessAPI1.
+     */
+    @Test
+    public void testTessBaseAPIGetAvailableLanguagesAsVector() {
+        logger.info("TessBaseAPIGetAvailableLanguagesAsVector");
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        String[] expResult = {"eng"};
+        String[] result = TessAPI1.TessBaseAPIGetAvailableLanguagesAsVector(handle).getPointer().getStringArray(0);
+        assertTrue(Arrays.asList(result).containsAll(Arrays.asList(expResult)));
+    }
+
+    /**
+     * Test of TessBaseAPIGetHOCRText method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetHOCRText() throws Exception {
+        logger.info("TessBaseAPIGetHOCRText");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        int page_number = 0;
+        Pointer utf8Text = TessAPI1.TessBaseAPIGetHOCRText(handle, page_number);
+        String result = utf8Text.getString(0);
+        TessAPI1.TessDeleteText(utf8Text);
+        assertTrue(result.contains("<div class='ocr_page'"));
+    }
+
+    /**
+     * Test of TessBaseAPIAnalyseLayout method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIAnalyseLayout() throws Exception {
+        logger.info("TessBaseAPIAnalyseLayout");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = 12; // number of lines in the test image
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(image.getPath());
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage2(handle, pix);
+        int pageIteratorLevel = TessPageIteratorLevel.RIL_TEXTLINE;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(pageIteratorLevel, TessPageIteratorLevel.class));
+        int i = 0;
+        TessPageIterator pi = TessAPI1.TessBaseAPIAnalyseLayout(handle);
+
+        do {
+            IntBuffer leftB = IntBuffer.allocate(1);
+            IntBuffer topB = IntBuffer.allocate(1);
+            IntBuffer rightB = IntBuffer.allocate(1);
+            IntBuffer bottomB = IntBuffer.allocate(1);
+            TessAPI1.TessPageIteratorBoundingBox(pi, pageIteratorLevel, leftB, topB, rightB, bottomB);
+            int left = leftB.get();
+            int top = topB.get();
+            int right = rightB.get();
+            int bottom = bottomB.get();
+            logger.info(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d", i++, left, top, right - left, bottom - top));
+        } while (TessAPI1.TessPageIteratorNext(pi, pageIteratorLevel) == TRUE);
+        TessAPI1.TessPageIteratorDelete(pi);
+        assertEquals(expResult, i);
+    }
+
+    /**
+     * Test of TessBaseAPIDetectOrientationScript method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIDetectOrientationScript() throws Exception {
+        logger.info("TessBaseAPIDetectOrientationScript");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = TRUE;
+        Pix pix = Leptonica1.pixRead(image.getPath());
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage2(handle, pix);
+
+        IntBuffer orient_degB = IntBuffer.allocate(1);
+        FloatBuffer orient_confB = FloatBuffer.allocate(1);
+        PointerByReference script_nameB = new PointerByReference();
+        FloatBuffer script_confB = FloatBuffer.allocate(1);
+
+        int result = TessAPI1.TessBaseAPIDetectOrientationScript(handle, orient_degB, orient_confB, script_nameB, script_confB);
+        if (result == TRUE) {
+            int orient_deg = orient_degB.get();
+            float orient_conf = orient_confB.get();
+            String script_name = script_nameB.getValue().getString(0);
+            float script_conf = script_confB.get();
+            logger.info(String.format("OrientationScript: orient_deg=%d, orient_conf=%f, script_name=%s, script_conf=%f", orient_deg, orient_conf, script_name, script_conf));
+        }
+
+        PointerByReference pRef = new PointerByReference();
+        pRef.setValue(pix.getPointer());
+        Leptonica1.pixDestroy(pRef);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of Orientation and script detection (OSD).
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testOSD() throws Exception {
+        logger.info("OSD");
+        int expResult = TessPageSegMode.PSM_AUTO_OSD;
+        IntBuffer orientation = IntBuffer.allocate(1);
+        IntBuffer direction = IntBuffer.allocate(1);
+        IntBuffer order = IntBuffer.allocate(1);
+        FloatBuffer deskew_angle = FloatBuffer.allocate(1);
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetPageSegMode(handle, expResult);
+        int actualResult = TessAPI1.TessBaseAPIGetPageSegMode(handle);
+        logger.info("PSM: " + Utils.getConstantName(actualResult, TessPageSegMode.class));
+        TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        int success = TessAPI1.TessBaseAPIRecognize(handle, null);
+        if (success == 0) {
+            TessAPI1.TessPageIterator pi = TessAPI1.TessBaseAPIAnalyseLayout(handle);
+            TessAPI1.TessPageIteratorOrientation(pi, orientation, direction, order, deskew_angle);
+            logger.info(String.format(
+                    "Orientation: %s\nWritingDirection: %s\nTextlineOrder: %s\nDeskew angle: %.4f\n",
+                    Utils.getConstantName(orientation.get(), TessOrientation.class),
+                    Utils.getConstantName(direction.get(), TessWritingDirection.class),
+                    Utils.getConstantName(order.get(), TessTextlineOrder.class),
+                    deskew_angle.get()));
+        }
+        assertEquals(expResult, actualResult);
+    }
+
+    /**
+     * Test of ResultIterator and PageIterator.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testResultIterator() throws Exception {
+        logger.info("TessBaseAPIGetIterator");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        ETEXT_DESC monitor = new ETEXT_DESC();
+        ITessAPI.TimeVal timeout = new ITessAPI.TimeVal();
+        timeout.tv_sec = new NativeLong(0L); // time > 0 causes blank ouput
+        monitor.end_time = timeout;
+        ProgressMonitor pmo = new ProgressMonitor(monitor);
+        pmo.start();
+        TessAPI1.TessBaseAPIRecognize(handle, monitor);
+        logger.info("Message: " + pmo.getMessage());
+        TessResultIterator ri = TessAPI1.TessBaseAPIGetIterator(handle);
+        TessPageIterator pi = TessAPI1.TessResultIteratorGetPageIterator(ri);
+        TessAPI1.TessPageIteratorBegin(pi);
+        logger.info("Bounding boxes:\nchar(s) left top right bottom confidence font-attributes");
+        int level = TessPageIteratorLevel.RIL_WORD;
+
+        // int height = image.getHeight();
+        do {
+            Pointer ptr = TessAPI1.TessResultIteratorGetUTF8Text(ri, level);
+            String word = ptr.getString(0);
+            TessAPI1.TessDeleteText(ptr);
+            float confidence = TessAPI1.TessResultIteratorConfidence(ri, level);
+            IntBuffer leftB = IntBuffer.allocate(1);
+            IntBuffer topB = IntBuffer.allocate(1);
+            IntBuffer rightB = IntBuffer.allocate(1);
+            IntBuffer bottomB = IntBuffer.allocate(1);
+            TessAPI1.TessPageIteratorBoundingBox(pi, level, leftB, topB, rightB, bottomB);
+            int left = leftB.get();
+            int top = topB.get();
+            int right = rightB.get();
+            int bottom = bottomB.get();
+            System.out.print(String.format("%s %d %d %d %d %f", word, left, top, right, bottom, confidence));
+            // logger.info(String.format("%s %d %d %d %d", str, left, height - bottom, right, height - top)); //
+            // training box coordinates
+
+            IntBuffer boldB = IntBuffer.allocate(1);
+            IntBuffer italicB = IntBuffer.allocate(1);
+            IntBuffer underlinedB = IntBuffer.allocate(1);
+            IntBuffer monospaceB = IntBuffer.allocate(1);
+            IntBuffer serifB = IntBuffer.allocate(1);
+            IntBuffer smallcapsB = IntBuffer.allocate(1);
+            IntBuffer pointSizeB = IntBuffer.allocate(1);
+            IntBuffer fontIdB = IntBuffer.allocate(1);
+            String fontName = TessAPI1.TessResultIteratorWordFontAttributes(ri, boldB, italicB, underlinedB,
+                    monospaceB, serifB, smallcapsB, pointSizeB, fontIdB);
+            boolean bold = boldB.get() == TRUE;
+            boolean italic = italicB.get() == TRUE;
+            boolean underlined = underlinedB.get() == TRUE;
+            boolean monospace = monospaceB.get() == TRUE;
+            boolean serif = serifB.get() == TRUE;
+            boolean smallcaps = smallcapsB.get() == TRUE;
+            int pointSize = pointSizeB.get();
+            int fontId = fontIdB.get();
+            logger.info(String.format("  font: %s, size: %d, font id: %d, bold: %b,"
+                    + " italic: %b, underlined: %b, monospace: %b, serif: %b, smallcap: %b", fontName, pointSize,
+                    fontId, bold, italic, underlined, monospace, serif, smallcaps));
+        } while (TessAPI1.TessPageIteratorNext(pi, level) == TRUE);
+
+        assertTrue(true);
+    }
+
+    /**
+     * Test of ChoiceIterator.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testChoiceIterator() throws Exception {
+        logger.info("TessResultIteratorGetChoiceIterator");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        TessAPI1.TessBaseAPIInit3(handle, datapath, language);
+        TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        TessAPI1.TessBaseAPISetVariable(handle, "save_blob_choices", "T");
+        TessAPI1.TessBaseAPISetRectangle(handle, 37, 228, 548, 31);
+        ETEXT_DESC monitor = new ETEXT_DESC();
+        ProgressMonitor pmo = new ProgressMonitor(monitor);
+        pmo.start();
+        TessAPI1.TessBaseAPIRecognize(handle, monitor);
+        logger.info("Message: " + pmo.getMessage());
+        TessResultIterator ri = TessAPI1.TessBaseAPIGetIterator(handle);
+        int level = TessPageIteratorLevel.RIL_SYMBOL;
+
+        if (ri != null) {
+            do {
+                Pointer symbol = TessAPI1.TessResultIteratorGetUTF8Text(ri, level);
+                float conf = TessAPI1.TessResultIteratorConfidence(ri, level);
+                if (symbol != null) {
+                    logger.info(String.format("symbol %s, conf: %f", symbol.getString(0), conf));
+                    boolean indent = false;
+                    TessChoiceIterator ci = TessAPI1.TessResultIteratorGetChoiceIterator(ri);
+                    do {
+                        if (indent) {
+                            System.out.print("\t");
+                        }
+                        System.out.print("\t- ");
+                        String choice = TessAPI1.TessChoiceIteratorGetUTF8Text(ci);
+                        logger.info(String.format("%s conf: %f", choice, TessAPI1.TessChoiceIteratorConfidence(ci)));
+                        indent = true;
+                    } while (TessAPI1.TessChoiceIteratorNext(ci) == ITessAPI.TRUE);
+                    TessAPI1.TessChoiceIteratorDelete(ci);
+                }
+                logger.info("---------------------------------------------");
+                TessAPI1.TessDeleteText(symbol);
+            } while (TessAPI1.TessResultIteratorNext(ri, level) == ITessAPI.TRUE);
+        }
+
+        assertTrue(true);
+    }
+
+    /**
+     * Test of ResultRenderer method, of class TessAPI1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testResultRenderer() throws Exception {
+        logger.info("TessResultRenderer");
+        String image = String.format("%s/%s", testResourcesDataPath, "eurotext.tif");
+        String output = "capi-test.txt";
+        int set_only_init_params = ITessAPI.FALSE;
+        int oem = TessOcrEngineMode.OEM_DEFAULT;
+        PointerByReference configs = null;
+        int configs_size = 0;
+
+        String[] params = {"load_system_dawg", "tessedit_char_whitelist"};
+        String vals[] = {"F", ""}; //0123456789-.IThisalotfpnex
+        PointerByReference vars_vec = new PointerByReference();
+        vars_vec.setPointer(new StringArray(params));
+        PointerByReference vars_values = new PointerByReference();
+        vars_values.setPointer(new StringArray(vals));
+        NativeSize vars_vec_size = new NativeSize(params.length);
+
+        TessAPI1.TessBaseAPISetOutputName(handle, output);
+
+        int rc = TessAPI1.TessBaseAPIInit4(handle, datapath, language,
+                oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, set_only_init_params);
+
+        if (rc != 0) {
+            TessAPI1.TessBaseAPIDelete(handle);
+            logger.error("Could not initialize tesseract.");
+            return;
+        }
+
+        String outputbase = "test/test-results/outputbase1";
+        TessResultRenderer renderer = TessAPI1.TessHOcrRendererCreate(outputbase);
+        TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessBoxTextRendererCreate(outputbase));
+        TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessTextRendererCreate(outputbase));
+        String dataPath = TessAPI1.TessBaseAPIGetDatapath(handle);
+        TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessPDFRendererCreate(outputbase, dataPath));
+        int result = TessAPI1.TessBaseAPIProcessPages(handle, image, null, 0, renderer);
+
+//        if (result == FALSE) {
+//            logger.error("Error during processing.");
+//            return;
+//        }
+        for (; renderer != null; renderer = TessAPI1.TessResultRendererNext(renderer)) {
+            String ext = TessAPI1.TessResultRendererExtention(renderer).getString(0);
+            logger.info(String.format("TessResultRendererExtention: %s\nTessResultRendererTitle: %s\nTessResultRendererImageNum: %d",
+                    ext,
+                    TessAPI1.TessResultRendererTitle(renderer).getString(0),
+                    TessAPI1.TessResultRendererImageNum(renderer)));
+        }
+
+        TessAPI1.TessDeleteResultRenderer(renderer);
+        assertTrue(new File(outputbase + ".pdf").exists());
+    }
+}

Tess4J/test/net/sourceforge/tess4j/TessAPIImpl.java

@@ -0,0 +1,625 @@
+/*
+ * Copyright @ 2017 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package net.sourceforge.tess4j;
+
+import com.ochafik.lang.jnaerator.runtime.NativeSize;
+import com.sun.jna.Pointer;
+import com.sun.jna.ptr.IntByReference;
+import com.sun.jna.ptr.PointerByReference;
+import java.nio.ByteBuffer;
+import java.nio.DoubleBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import net.sourceforge.lept4j.Boxa;
+import net.sourceforge.lept4j.Pix;
+
+public class TessAPIImpl implements TessAPI {
+
+    public TessAPI getInstance() {
+        return TessAPI.INSTANCE;
+    }
+
+    public void TessAPIEndPage() {
+    }
+
+    public void TessAPIRelease() {
+    }
+
+    @Override
+    public String TessVersion() {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessDeleteText(Pointer text) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessDeleteTextArray(PointerByReference arr) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessDeleteIntArray(IntBuffer arr) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessTextRendererCreate(String outputbase) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessHOcrRendererCreate(String outputbase) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public TessResultRenderer TessHOcrRendererCreate2(String outputbase, int font_info) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessPDFRendererCreate(String outputbase, String datadir) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public TessResultRenderer TessPDFRendererCreateTextonly(String outputbase, String datadir, int textonly) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessUnlvRendererCreate(String outputbase) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessBoxTextRendererCreate(String outputbase) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessDeleteResultRenderer(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessResultRendererInsert(ITessAPI.TessResultRenderer renderer, ITessAPI.TessResultRenderer next) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultRenderer TessResultRendererNext(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultRendererBeginDocument(ITessAPI.TessResultRenderer renderer, String title) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultRendererAddImage(ITessAPI.TessResultRenderer renderer, PointerByReference api) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultRendererEndDocument(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessResultRendererExtention(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessResultRendererTitle(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultRendererImageNum(ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessBaseAPI TessBaseAPICreate() {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIDelete(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetInputName(ITessAPI.TessBaseAPI handle, String name) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessBaseAPIGetInputName(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetInputImage(ITessAPI.TessBaseAPI handle, Pix pix) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pix TessBaseAPIGetInputImage(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetSourceYResolution(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessBaseAPIGetDatapath(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetOutputName(ITessAPI.TessBaseAPI handle, String name) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPISetVariable(ITessAPI.TessBaseAPI handle, String name, String value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetIntVariable(ITessAPI.TessBaseAPI handle, String name, IntBuffer value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetBoolVariable(ITessAPI.TessBaseAPI handle, String name, IntBuffer value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetDoubleVariable(ITessAPI.TessBaseAPI handle, String name, DoubleBuffer value) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessBaseAPIGetStringVariable(ITessAPI.TessBaseAPI handle, String name) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIPrintVariablesToFile(ITessAPI.TessBaseAPI handle, String filename) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIInit1(ITessAPI.TessBaseAPI handle, String datapath, String language, int oem, PointerByReference configs, int configs_size) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIInit2(ITessAPI.TessBaseAPI handle, String datapath, String language, int oem) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIInit3(ITessAPI.TessBaseAPI handle, String datapath, String language) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIInit4(ITessAPI.TessBaseAPI handle, String datapath, String language, int oem, PointerByReference configs, int configs_size, PointerByReference vars_vec, PointerByReference vars_values, NativeSize vars_vec_size, int set_only_non_debug_params) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessBaseAPIGetInitLanguagesAsString(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public PointerByReference TessBaseAPIGetLoadedLanguagesAsVector(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public PointerByReference TessBaseAPIGetAvailableLanguagesAsVector(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIInitLangMod(ITessAPI.TessBaseAPI handle, String datapath, String language) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIInitForAnalysePage(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIReadConfigFile(ITessAPI.TessBaseAPI handle, String filename, int init_only) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetPageSegMode(ITessAPI.TessBaseAPI handle, int mode) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetPageSegMode(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessBaseAPIRect(ITessAPI.TessBaseAPI handle, ByteBuffer imagedata, int bytes_per_pixel, int bytes_per_line, int left, int top, int width, int height) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIClearAdaptiveClassifier(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetImage(ITessAPI.TessBaseAPI handle, ByteBuffer imagedata, int width, int height, int bytes_per_pixel, int bytes_per_line) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetImage2(ITessAPI.TessBaseAPI handle, Pix pix) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetSourceResolution(ITessAPI.TessBaseAPI handle, int ppi) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPISetRectangle(ITessAPI.TessBaseAPI handle, int left, int top, int width, int height) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pix TessBaseAPIGetThresholdedImage(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetRegions(ITessAPI.TessBaseAPI handle, PointerByReference pixa) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetTextlines(ITessAPI.TessBaseAPI handle, PointerByReference pixa, PointerByReference blockids) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetTextlines1(ITessAPI.TessBaseAPI handle, int raw_image, int raw_padding, PointerByReference pixa, PointerByReference blockids, PointerByReference paraids) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetStrips(ITessAPI.TessBaseAPI handle, PointerByReference pixa, PointerByReference blockids) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetWords(ITessAPI.TessBaseAPI handle, PointerByReference pixa) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetConnectedComponents(ITessAPI.TessBaseAPI handle, PointerByReference cc) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetComponentImages(ITessAPI.TessBaseAPI handle, int level, int text_only, PointerByReference pixa, PointerByReference blockids) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Boxa TessBaseAPIGetComponentImages1(ITessAPI.TessBaseAPI handle, int level, int text_only, int raw_image, int raw_padding, PointerByReference pixa, PointerByReference blockids, PointerByReference paraids) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetThresholdedImageScaleFactor(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIDumpPGM(ITessAPI.TessBaseAPI handle, String filename) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessPageIterator TessBaseAPIAnalyseLayout(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIRecognize(ITessAPI.TessBaseAPI handle, ITessAPI.ETEXT_DESC monitor) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIRecognizeForChopTest(ITessAPI.TessBaseAPI handle, ITessAPI.ETEXT_DESC monitor) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultIterator TessBaseAPIGetIterator(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessMutableIterator TessBaseAPIGetMutableIterator(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIProcessPages(ITessAPI.TessBaseAPI handle, String filename, String retry_config, int timeout_millisec, ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIProcessPage(ITessAPI.TessBaseAPI handle, Pix pix, int page_index, String filename, String retry_config, int timeout_millisec, ITessAPI.TessResultRenderer renderer) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessBaseAPIGetUTF8Text(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessBaseAPIGetHOCRText(ITessAPI.TessBaseAPI handle, int page_number) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessBaseAPIGetBoxText(ITessAPI.TessBaseAPI handle, int page_number) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessBaseAPIGetUNLVText(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIMeanTextConf(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public IntByReference TessBaseAPIAllWordConfidences(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIAdaptToWordStr(ITessAPI.TessBaseAPI handle, int mode, String wordstr) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIClear(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIEnd(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIIsValidWord(ITessAPI.TessBaseAPI handle, String word) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIGetTextDirection(ITessAPI.TessBaseAPI handle, IntBuffer out_offset, FloatBuffer out_slope) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessBaseAPIClearPersistentCache(ITessAPI.TessBaseAPI handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessBaseAPIDetectOrientationScript(TessBaseAPI handle, IntBuffer orient_deg, FloatBuffer orient_conf, PointerByReference script_name, FloatBuffer script_conf) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessBaseAPIGetUnichar(ITessAPI.TessBaseAPI handle, int unichar_id) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessPageIteratorDelete(ITessAPI.TessPageIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessPageIterator TessPageIteratorCopy(ITessAPI.TessPageIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessPageIteratorBegin(ITessAPI.TessPageIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorNext(ITessAPI.TessPageIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorIsAtBeginningOf(ITessAPI.TessPageIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorIsAtFinalElement(ITessAPI.TessPageIterator handle, int level, int element) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorBoundingBox(ITessAPI.TessPageIterator handle, int level, IntBuffer left, IntBuffer top, IntBuffer right, IntBuffer bottom) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorBlockType(ITessAPI.TessPageIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pix TessPageIteratorGetBinaryImage(ITessAPI.TessPageIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pix TessPageIteratorGetImage(ITessAPI.TessPageIterator handle, int level, int padding, Pix original_image, IntBuffer left, IntBuffer top) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessPageIteratorBaseline(ITessAPI.TessPageIterator handle, int level, IntBuffer x1, IntBuffer y1, IntBuffer x2, IntBuffer y2) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessPageIteratorOrientation(ITessAPI.TessPageIterator handle, IntBuffer orientation, IntBuffer writing_direction, IntBuffer textline_order, FloatBuffer deskew_angle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessPageIteratorParagraphInfo(ITessAPI.TessPageIterator handle, IntBuffer justification, IntBuffer is_list_item, IntBuffer is_crown, IntBuffer first_line_indent) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessResultIteratorDelete(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessResultIterator TessResultIteratorCopy(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessPageIterator TessResultIteratorGetPageIterator(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessPageIterator TessResultIteratorGetPageIteratorConst(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorNext(ITessAPI.TessResultIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public Pointer TessResultIteratorGetUTF8Text(ITessAPI.TessResultIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public float TessResultIteratorConfidence(ITessAPI.TessResultIterator handle, int level) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessResultIteratorWordRecognitionLanguage(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessResultIteratorWordFontAttributes(ITessAPI.TessResultIterator handle, IntBuffer is_bold, IntBuffer is_italic, IntBuffer is_underlined, IntBuffer is_monospace, IntBuffer is_serif, IntBuffer is_smallcaps, IntBuffer pointsize, IntBuffer font_id) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorWordIsFromDictionary(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorWordIsNumeric(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorSymbolIsSuperscript(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorSymbolIsSubscript(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessResultIteratorSymbolIsDropcap(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public ITessAPI.TessChoiceIterator TessResultIteratorGetChoiceIterator(ITessAPI.TessResultIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public void TessChoiceIteratorDelete(ITessAPI.TessChoiceIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public int TessChoiceIteratorNext(ITessAPI.TessChoiceIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public String TessChoiceIteratorGetUTF8Text(ITessAPI.TessChoiceIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    @Override
+    public float TessChoiceIteratorConfidence(ITessAPI.TessChoiceIterator handle) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+}

Tess4J/test/net/sourceforge/tess4j/TessAPITest.java

@@ -0,0 +1,648 @@
+/**
+ * Copyright @ 2012 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import static org.junit.Assert.assertArrayEquals;
+
+import java.awt.image.BufferedImage;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileReader;
+import java.nio.ByteBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.util.Arrays;
+
+import javax.imageio.ImageIO;
+
+import net.sourceforge.tess4j.util.ImageIOHelper;
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.Utils;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import com.ochafik.lang.jnaerator.runtime.NativeSize;
+import com.sun.jna.NativeLong;
+import com.sun.jna.Pointer;
+import com.sun.jna.StringArray;
+import com.sun.jna.ptr.PointerByReference;
+import net.sourceforge.lept4j.Box;
+import net.sourceforge.lept4j.Boxa;
+import static net.sourceforge.lept4j.ILeptonica.L_CLONE;
+import net.sourceforge.lept4j.Leptonica;
+import net.sourceforge.lept4j.Pix;
+import net.sourceforge.lept4j.util.LeptUtils;
+
+import net.sourceforge.tess4j.ITessAPI.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static net.sourceforge.tess4j.ITessAPI.FALSE;
+import static net.sourceforge.tess4j.ITessAPI.TRUE;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class TessAPITest {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    private final String datapath = ".";
+    private final String testResourcesDataPath = "test/resources/test-data";
+    String language = "eng";
+    String expOCRResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+
+    TessAPI api;
+    TessBaseAPI handle;
+
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws Exception {
+    }
+
+    @Before
+    public void setUp() {
+        api = new TessAPIImpl().getInstance();
+        handle = api.TessBaseAPICreate();
+    }
+
+    @After
+    public void tearDown() {
+        api.TessBaseAPIDelete(handle);
+    }
+
+    /**
+     * Test of TessBaseAPIRect method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIRect() throws Exception {
+        logger.info("TessBaseAPIRect");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(tiff); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        Pointer utf8Text = api.TessBaseAPIRect(handle, buf, bytespp, bytespl, 90, 50, 862, 614);
+        String result = utf8Text.getString(0);
+        api.TessDeleteText(utf8Text);
+        logger.info(result);
+        assertTrue(result.startsWith(expResult));
+    }
+
+    /**
+     * Test of TessBaseAPIGetUTF8Text method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetUTF8Text() throws Exception {
+        logger.info("TessBaseAPIGetUTF8Text");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        api.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        api.TessBaseAPISetRectangle(handle, 90, 50, 862, 614);
+        Pointer utf8Text = api.TessBaseAPIGetUTF8Text(handle);
+        String result = utf8Text.getString(0);
+        api.TessDeleteText(utf8Text);
+        logger.info(result);
+        assertTrue(result.startsWith(expResult));
+    }
+
+    /**
+     * Test of TessBaseAPIGetUTF8Text method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetUTF8Text_Pix() throws Exception {
+        logger.info("TessBaseAPIGetUTF8Text_Pix");
+        String expResult = expOCRResult;
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(tiff.getPath());
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage2(handle, pix);
+        Pointer utf8Text = api.TessBaseAPIGetUTF8Text(handle);
+        String result = utf8Text.getString(0);
+        api.TessDeleteText(utf8Text);
+        logger.info(result);
+
+        //release Pix resource
+        PointerByReference pRef = new PointerByReference();
+        pRef.setValue(pix.getPointer());
+        leptInstance.pixDestroy(pRef);
+
+        assertTrue(result.startsWith(expResult));
+    }
+
+    /**
+     * Test of TessBaseAPIGetComponentImages method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetComponentImages() throws Exception {
+        logger.info("TessBaseAPIGetComponentImages");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = 12; // number of lines in the test image
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(image.getPath());
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage2(handle, pix);
+        PointerByReference pixa = null;
+        PointerByReference blockids = null;
+        Boxa boxes = api.TessBaseAPIGetComponentImages(handle, TessPageIteratorLevel.RIL_TEXTLINE, TRUE, pixa, blockids);
+//        boxes = api.TessBaseAPIGetRegions(handle, pixa); // equivalent to TessPageIteratorLevel.RIL_BLOCK
+        int boxCount = leptInstance.boxaGetCount(boxes);
+        for (int i = 0; i < boxCount; i++) {
+            Box box = leptInstance.boxaGetBox(boxes, i, L_CLONE);
+            if (box == null) {
+                continue;
+            }
+            api.TessBaseAPISetRectangle(handle, box.x, box.y, box.w, box.h);
+            Pointer utf8Text = api.TessBaseAPIGetUTF8Text(handle);
+            String ocrResult = utf8Text.getString(0);
+            api.TessDeleteText(utf8Text);
+            int conf = api.TessBaseAPIMeanTextConf(handle);
+            System.out.print(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d, confidence: %d, text: %s", i, box.x, box.y, box.w, box.h, conf, ocrResult));
+            LeptUtils.dispose(box);
+        }
+
+        // release Pix and Boxa resources
+        LeptUtils.dispose(pix);
+        LeptUtils.dispose(boxes);
+
+        assertEquals(expResult, boxCount);
+    }
+
+    /**
+     * Test of TessVersion method, of class TessAPI.
+     */
+    @Test
+    public void testTessVersion() {
+        logger.info("TessVersion");
+        String expResult = "3.05.01";
+        String result = api.TessVersion();
+        logger.info(result);
+        assertTrue(result.startsWith(expResult));
+    }
+
+    /**
+     * Test of TessBaseAPIGetBoolVariable method, of class TessAPI.
+     */
+    @Test
+    public void testTessBaseAPIGetBoolVariable() {
+        logger.info("TessBaseAPIGetBoolVariable");
+        String name = "tessedit_create_hocr";
+        api.TessBaseAPISetVariable(handle, name, "1");
+        IntBuffer value = IntBuffer.allocate(1);
+        int result = -1;
+        if (api.TessBaseAPIGetBoolVariable(handle, "tessedit_create_hocr", value) == TRUE) {
+            result = value.get(0);
+        }
+        int expResult = 1;
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIPrintVariables method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIPrintVariablesToFile() throws Exception {
+        logger.info("TessBaseAPIPrintVariablesToFile");
+        String var = "tessedit_char_whitelist";
+        String value = "0123456789";
+        api.TessBaseAPISetVariable(handle, var, value);
+        String filename = "printvar.txt";
+        api.TessBaseAPIPrintVariablesToFile(handle, filename); // will crash if not invoked after some method
+        File file = new File(filename);
+        BufferedReader input = new BufferedReader(new FileReader(file));
+        StringBuilder strB = new StringBuilder();
+        String line;
+        String EOL = System.getProperty("line.separator");
+        while ((line = input.readLine()) != null) {
+            strB.append(line).append(EOL);
+        }
+        input.close();
+        file.delete();
+        assertTrue(strB.toString().contains(var + "\t" + value));
+    }
+
+    /**
+     * Test of TessBaseAPIInit4 method, of class TessAPI.
+     */
+    @Test
+    public void testTessBaseAPIInit4() {
+        logger.info("TessBaseAPIInit4");
+        int oem = TessOcrEngineMode.OEM_DEFAULT;
+        PointerByReference configs = null; //new PointerByReference();
+        int configs_size = 0;
+
+        // disable loading dictionaries
+        String[] args = new String[]{"load_system_dawg", "load_freq_dawg"};
+        StringArray sarray = new StringArray(args);
+        PointerByReference vars_vec = new PointerByReference();
+        vars_vec.setPointer(sarray);
+
+        args = new String[]{"F", "F"};
+        sarray = new StringArray(args);
+        PointerByReference vars_values = new PointerByReference();
+        vars_values.setPointer(sarray);
+
+        NativeSize vars_vec_size = new NativeSize(args.length);
+
+        int expResult = 0;
+        int result = api.TessBaseAPIInit4(handle, datapath, language, oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, FALSE);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetInitLanguagesAsString method, of class TessAPI.
+     */
+    @Test
+    public void testTessBaseAPIGetInitLanguagesAsString() {
+        logger.info("TessBaseAPIGetInitLanguagesAsString");
+        String expResult = "";
+        String result = api.TessBaseAPIGetInitLanguagesAsString(handle);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetLoadedLanguagesAsVector method, of class TessAPI.
+     */
+    @Test
+    public void testTessBaseAPIGetLoadedLanguagesAsVector() {
+        logger.info("TessBaseAPIGetLoadedLanguagesAsVector");
+        api.TessBaseAPIInit3(handle, datapath, language);
+        String[] expResult = {"eng"};
+        String[] result = api.TessBaseAPIGetLoadedLanguagesAsVector(handle).getPointer().getStringArray(0);
+        assertArrayEquals(expResult, result);
+    }
+
+    /**
+     * Test of TessBaseAPIGetAvailableLanguagesAsVector method, of class
+     * TessAPI.
+     */
+    @Test
+    public void testTessBaseAPIGetAvailableLanguagesAsVector() {
+        logger.info("TessBaseAPIGetAvailableLanguagesAsVector");
+        api.TessBaseAPIInit3(handle, datapath, language);
+        String[] expResult = {"eng"};
+        String[] result = api.TessBaseAPIGetAvailableLanguagesAsVector(handle).getPointer().getStringArray(0);
+        assertTrue(Arrays.asList(result).containsAll(Arrays.asList(expResult)));
+    }
+
+    /**
+     * Test of TessBaseAPIGetHOCRText method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIGetHOCRText() throws Exception {
+        logger.info("TessBaseAPIGetHOCRText");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        int page_number = 0;
+        Pointer utf8Text = api.TessBaseAPIGetHOCRText(handle, page_number);
+        String result = utf8Text.getString(0);
+        api.TessDeleteText(utf8Text);
+        assertTrue(result.contains("<div class='ocr_page'"));
+    }
+
+    /**
+     * Test of TessBaseAPIAnalyseLayout method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIAnalyseLayout() throws Exception {
+        logger.info("TessBaseAPIAnalyseLayout");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = 12; // number of lines in the test image
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(image.getPath());
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage2(handle, pix);
+        int pageIteratorLevel = TessPageIteratorLevel.RIL_TEXTLINE;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(pageIteratorLevel, TessPageIteratorLevel.class));
+        int i = 0;
+        TessPageIterator pi = api.TessBaseAPIAnalyseLayout(handle);
+
+        do {
+            IntBuffer leftB = IntBuffer.allocate(1);
+            IntBuffer topB = IntBuffer.allocate(1);
+            IntBuffer rightB = IntBuffer.allocate(1);
+            IntBuffer bottomB = IntBuffer.allocate(1);
+            api.TessPageIteratorBoundingBox(pi, pageIteratorLevel, leftB, topB, rightB, bottomB);
+            int left = leftB.get();
+            int top = topB.get();
+            int right = rightB.get();
+            int bottom = bottomB.get();
+            logger.info(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d", i++, left, top, right - left, bottom - top));
+        } while (api.TessPageIteratorNext(pi, pageIteratorLevel) == TRUE);
+        api.TessPageIteratorDelete(pi);
+        assertEquals(expResult, i);
+    }
+
+    /**
+     * Test of TessBaseAPIDetectOrientationScript method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testTessBaseAPIDetectOrientationScript() throws Exception {
+        logger.info("TessBaseAPIDetectOrientationScript");
+        File image = new File(testResourcesDataPath, "eurotext.png");
+        int expResult = TRUE;
+        Leptonica leptInstance = Leptonica.INSTANCE;
+        Pix pix = leptInstance.pixRead(image.getPath());
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage2(handle, pix);
+
+        IntBuffer orient_degB = IntBuffer.allocate(1);
+        FloatBuffer orient_confB = FloatBuffer.allocate(1);
+        PointerByReference script_nameB = new PointerByReference();
+        FloatBuffer script_confB = FloatBuffer.allocate(1);
+
+        int result = api.TessBaseAPIDetectOrientationScript(handle, orient_degB, orient_confB, script_nameB, script_confB);
+        if (result == TRUE) {
+            int orient_deg = orient_degB.get();
+            float orient_conf = orient_confB.get();
+            String script_name = script_nameB.getValue().getString(0);
+            float script_conf = script_confB.get();
+            logger.info(String.format("OrientationScript: orient_deg=%d, orient_conf=%f, script_name=%s, script_conf=%f", orient_deg, orient_conf, script_name, script_conf));
+        }
+
+        PointerByReference pRef = new PointerByReference();
+        pRef.setValue(pix.getPointer());
+        leptInstance.pixDestroy(pRef);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of Orientation and script detection (OSD).
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testOSD() throws Exception {
+        logger.info("OSD");
+        int expResult = TessPageSegMode.PSM_AUTO_OSD;
+        IntBuffer orientation = IntBuffer.allocate(1);
+        IntBuffer direction = IntBuffer.allocate(1);
+        IntBuffer order = IntBuffer.allocate(1);
+        FloatBuffer deskew_angle = FloatBuffer.allocate(1);
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO_OSD);
+        int actualResult = api.TessBaseAPIGetPageSegMode(handle);
+        logger.info("PSM: " + Utils.getConstantName(actualResult, TessPageSegMode.class));
+        api.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        int success = api.TessBaseAPIRecognize(handle, null);
+        if (success == 0) {
+            TessPageIterator pi = api.TessBaseAPIAnalyseLayout(handle);
+            api.TessPageIteratorOrientation(pi, orientation, direction, order, deskew_angle);
+            logger.info(String.format(
+                    "Orientation: %s\nWritingDirection: %s\nTextlineOrder: %s\nDeskew angle: %.4f\n",
+                    Utils.getConstantName(orientation.get(), TessOrientation.class),
+                    Utils.getConstantName(direction.get(), TessWritingDirection.class),
+                    Utils.getConstantName(order.get(), TessTextlineOrder.class),
+                    deskew_angle.get()));
+        }
+        assertEquals(expResult, actualResult);
+    }
+
+    /**
+     * Test of ResultIterator and PageIterator.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testResultIterator() throws Exception {
+        logger.info("TessBaseAPIGetIterator");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
+        api.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        ETEXT_DESC monitor = new ETEXT_DESC();
+        TimeVal timeout = new TimeVal();
+        timeout.tv_sec = new NativeLong(0L); // time > 0 causes blank ouput
+        monitor.end_time = timeout;
+        ProgressMonitor pmo = new ProgressMonitor(monitor);
+        pmo.start();
+        api.TessBaseAPIRecognize(handle, monitor);
+        logger.info("Message: " + pmo.getMessage());
+        TessResultIterator ri = api.TessBaseAPIGetIterator(handle);
+        TessPageIterator pi = api.TessResultIteratorGetPageIterator(ri);
+        api.TessPageIteratorBegin(pi);
+        logger.info("Bounding boxes:\nchar(s) left top right bottom confidence font-attributes");
+        int level = TessPageIteratorLevel.RIL_WORD;
+
+        // int height = image.getHeight();
+        do {
+            Pointer ptr = api.TessResultIteratorGetUTF8Text(ri, level);
+            String word = ptr.getString(0);
+            api.TessDeleteText(ptr);
+            float confidence = api.TessResultIteratorConfidence(ri, level);
+            IntBuffer leftB = IntBuffer.allocate(1);
+            IntBuffer topB = IntBuffer.allocate(1);
+            IntBuffer rightB = IntBuffer.allocate(1);
+            IntBuffer bottomB = IntBuffer.allocate(1);
+            api.TessPageIteratorBoundingBox(pi, level, leftB, topB, rightB, bottomB);
+            int left = leftB.get();
+            int top = topB.get();
+            int right = rightB.get();
+            int bottom = bottomB.get();
+            System.out.print(String.format("%s %d %d %d %d %f", word, left, top, right, bottom, confidence));
+            // logger.info(String.format("%s %d %d %d %d", str, left, height - bottom, right, height - top)); //
+            // training box coordinates
+
+            IntBuffer boldB = IntBuffer.allocate(1);
+            IntBuffer italicB = IntBuffer.allocate(1);
+            IntBuffer underlinedB = IntBuffer.allocate(1);
+            IntBuffer monospaceB = IntBuffer.allocate(1);
+            IntBuffer serifB = IntBuffer.allocate(1);
+            IntBuffer smallcapsB = IntBuffer.allocate(1);
+            IntBuffer pointSizeB = IntBuffer.allocate(1);
+            IntBuffer fontIdB = IntBuffer.allocate(1);
+            String fontName = api.TessResultIteratorWordFontAttributes(ri, boldB, italicB, underlinedB, monospaceB,
+                    serifB, smallcapsB, pointSizeB, fontIdB);
+            boolean bold = boldB.get() == TRUE;
+            boolean italic = italicB.get() == TRUE;
+            boolean underlined = underlinedB.get() == TRUE;
+            boolean monospace = monospaceB.get() == TRUE;
+            boolean serif = serifB.get() == TRUE;
+            boolean smallcaps = smallcapsB.get() == TRUE;
+            int pointSize = pointSizeB.get();
+            int fontId = fontIdB.get();
+            logger.info(String.format("  font: %s, size: %d, font id: %d, bold: %b,"
+                    + " italic: %b, underlined: %b, monospace: %b, serif: %b, smallcap: %b", fontName, pointSize,
+                    fontId, bold, italic, underlined, monospace, serif, smallcaps));
+        } while (api.TessPageIteratorNext(pi, level) == TRUE);
+
+        assertTrue(true);
+    }
+
+    /**
+     * Test of ChoiceIterator.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testChoiceIterator() throws Exception {
+        logger.info("TessResultIteratorGetChoiceIterator");
+        File tiff = new File(testResourcesDataPath, "eurotext.tif");
+        BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
+        ByteBuffer buf = ImageIOHelper.convertImageData(image);
+        int bpp = image.getColorModel().getPixelSize();
+        int bytespp = bpp / 8;
+        int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
+        api.TessBaseAPIInit3(handle, datapath, language);
+        api.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
+        api.TessBaseAPISetVariable(handle, "save_blob_choices", "T");
+        api.TessBaseAPISetRectangle(handle, 37, 228, 548, 31);
+        ETEXT_DESC monitor = new ETEXT_DESC();
+        ProgressMonitor pmo = new ProgressMonitor(monitor);
+        pmo.start();
+        api.TessBaseAPIRecognize(handle, monitor);
+        logger.info("Message: " + pmo.getMessage());
+        TessResultIterator ri = api.TessBaseAPIGetIterator(handle);
+        int level = TessPageIteratorLevel.RIL_SYMBOL;
+
+        if (ri != null) {
+            do {
+                Pointer symbol = api.TessResultIteratorGetUTF8Text(ri, level);
+                float conf = api.TessResultIteratorConfidence(ri, level);
+                if (symbol != null) {
+                    logger.info(String.format("symbol %s, conf: %f", symbol.getString(0), conf));
+                    boolean indent = false;
+                    TessChoiceIterator ci = api.TessResultIteratorGetChoiceIterator(ri);
+                    do {
+                        if (indent) {
+                            System.out.print("\t");
+                        }
+                        System.out.print("\t- ");
+                        String choice = api.TessChoiceIteratorGetUTF8Text(ci);
+                        logger.info(String.format("%s conf: %f", choice, api.TessChoiceIteratorConfidence(ci)));
+                        indent = true;
+                    } while (api.TessChoiceIteratorNext(ci) == ITessAPI.TRUE);
+                    api.TessChoiceIteratorDelete(ci);
+                }
+                logger.info("---------------------------------------------");
+                api.TessDeleteText(symbol);
+            } while (api.TessResultIteratorNext(ri, level) == ITessAPI.TRUE);
+        }
+
+        assertTrue(true);
+    }
+
+    /**
+     * Test of ResultRenderer method, of class TessAPI.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testResultRenderer() throws Exception {
+        logger.info("TessResultRenderer");
+        String image = String.format("%s/%s", testResourcesDataPath, "eurotext.tif");
+        String output = "capi-test.txt";
+        int set_only_init_params = FALSE;
+        int oem = TessOcrEngineMode.OEM_DEFAULT;
+        PointerByReference configs = null;
+        int configs_size = 0;
+
+        String[] params = {"load_system_dawg", "tessedit_char_whitelist"};
+        String vals[] = {"F", ""}; //0123456789-.IThisalotfpnex
+        PointerByReference vars_vec = new PointerByReference();
+        vars_vec.setPointer(new StringArray(params));
+        PointerByReference vars_values = new PointerByReference();
+        vars_values.setPointer(new StringArray(vals));
+        NativeSize vars_vec_size = new NativeSize(params.length);
+
+        api.TessBaseAPISetOutputName(handle, output);
+
+        int rc = api.TessBaseAPIInit4(handle, datapath, language,
+                oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, set_only_init_params);
+
+        if (rc != 0) {
+            api.TessBaseAPIDelete(handle);
+            logger.error("Could not initialize tesseract.");
+            return;
+        }
+
+        String outputbase = "test/test-results/outputbase";
+        TessResultRenderer renderer = api.TessHOcrRendererCreate(outputbase);
+        api.TessResultRendererInsert(renderer, api.TessBoxTextRendererCreate(outputbase));
+        api.TessResultRendererInsert(renderer, api.TessTextRendererCreate(outputbase));
+        String dataPath = api.TessBaseAPIGetDatapath(handle);
+        api.TessResultRendererInsert(renderer, api.TessPDFRendererCreate(outputbase, dataPath));
+        int result = api.TessBaseAPIProcessPages(handle, image, null, 0, renderer);
+
+        if (result == FALSE) {
+            logger.error("Error during processing.");
+            return;
+        }
+
+        for (; renderer != null; renderer = api.TessResultRendererNext(renderer)) {
+            String ext = api.TessResultRendererExtention(renderer).getString(0);
+            logger.info(String.format("TessResultRendererExtention: %s\nTessResultRendererTitle: %s\nTessResultRendererImageNum: %d",
+                    ext,
+                    api.TessResultRendererTitle(renderer).getString(0),
+                    api.TessResultRendererImageNum(renderer)));
+        }
+
+        api.TessDeleteResultRenderer(renderer);
+        assertTrue(new File(outputbase + ".pdf").exists());
+    }
+}

Tess4J/test/net/sourceforge/tess4j/Tesseract1Test.java

@@ -0,0 +1,267 @@
+/**
+ * Copyright @ 2010 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import java.awt.Rectangle;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Arrays;
+
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.Utils;
+import net.sourceforge.tess4j.util.ImageHelper;
+import net.sourceforge.tess4j.util.ImageIOHelper;
+import net.sourceforge.tess4j.ITesseract.RenderedFormat;
+import net.sourceforge.tess4j.ITessAPI.TessPageIteratorLevel;
+
+import com.recognition.software.jdeskew.ImageDeskew;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class Tesseract1Test {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    static final double MINIMUM_DESKEW_THRESHOLD = 0.05d;
+    ITesseract instance;
+
+    private final String datapath = ".";
+    private final String testResourcesDataPath = "test/resources/test-data";
+    private final String expOCRResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws Exception {
+    }
+
+    @Before
+    public void setUp() {
+        instance = new Tesseract1();
+        instance.setDatapath(new File(datapath).getPath());
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File() throws Exception {
+        logger.info("doOCR on a PNG image");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_UNLV_Zone_File() throws Exception {
+        logger.info("doOCR on a PNG image with UNLV zone file .uzn");
+        //UNLV zone format: left top width height label
+        File imageFile = new File(testResourcesDataPath, "eurotext_unlv.png");
+        String expResult = "& duck/goose, as 12.5% of E-mail\n\n"
+                + "from aspammer@website.com is spam.\n\n"
+                + "The (quick) [brown] {fox} jumps!\n"
+                + "Over the $43,456.78 <lazy> #90 dog";
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertEquals(expResult, result.trim());
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File_With_Configs() throws Exception {
+        logger.info("doOCR with configs");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        String expResult = "[-0123456789.\n ]+";
+        List<String> configs = Arrays.asList("digits");
+        instance.setConfigs(configs);
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertTrue(result.matches(expResult));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File_Rectangle() throws Exception {
+        logger.info("doOCR on a BMP image with bounding rectangle");
+        File imageFile = new File(testResourcesDataPath, "eurotext.bmp");
+        Rectangle rect = new Rectangle(0, 0, 1024, 800); // define an equal or smaller region of interest on the image
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageFile, rect);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_PDF() throws Exception {
+        logger.info("doOCR on a PDF document");
+        File imageFile = new File(testResourcesDataPath, "eurotext.pdf");
+        List<IIOImage> imageList = ImageIOHelper.getIIOImageList(imageFile);
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageList, null);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_BufferedImage() throws Exception {
+        logger.info("doOCR on a buffered image of a PNG");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        String expResult = expOCRResult;
+        String result = instance.doOCR(bi);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of deskew algorithm.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_SkewedImage() throws Exception {
+        logger.info("doOCR on a skewed PNG image");
+        File imageFile = new File(testResourcesDataPath, "eurotext_deskew.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        ImageDeskew id = new ImageDeskew(bi);
+        double imageSkewAngle = id.getSkewAngle(); // determine skew angle
+        if ((imageSkewAngle > MINIMUM_DESKEW_THRESHOLD || imageSkewAngle < -(MINIMUM_DESKEW_THRESHOLD))) {
+            bi = ImageHelper.rotateImage(bi, -imageSkewAngle); // deskew image
+        }
+
+        String expResult = expOCRResult;
+        String result = instance.doOCR(bi);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of createDocuments method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testCreateDocuments() throws Exception {
+        logger.info("createDocuments for an image");
+        File imageFile1 = new File(testResourcesDataPath, "eurotext.pdf");
+        File imageFile2 = new File(testResourcesDataPath, "eurotext.png");
+        String outputbase1 = "test/test-results/docrenderer1-1";
+        String outputbase2 = "test/test-results/docrenderer1-2";
+        List<RenderedFormat> formats = new ArrayList<RenderedFormat>(Arrays.asList(RenderedFormat.HOCR, RenderedFormat.PDF, RenderedFormat.TEXT));
+        instance.createDocuments(new String[]{imageFile1.getPath(), imageFile2.getPath()}, new String[]{outputbase1, outputbase2}, formats);
+        assertTrue(new File(outputbase1 + ".pdf").exists());
+    }
+
+    /**
+     * Test of getWords method, of class Tesseract1.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testGetWords() throws Exception {
+        logger.info("getWords");
+        File imageFile = new File(testResourcesDataPath, "eurotext.tif");
+
+        String expResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+        String[] expResults = expResult.split("\\s");
+
+        int pageIteratorLevel = TessPageIteratorLevel.RIL_WORD;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(pageIteratorLevel, TessPageIteratorLevel.class));
+        BufferedImage bi = ImageIO.read(imageFile);
+        List<Word> result = instance.getWords(bi, pageIteratorLevel);
+
+        // print the complete result
+        for (Word word : result) {
+            logger.info(word.toString());
+        }
+
+        List<String> text = new ArrayList<String>();
+        for (Word word : result.subList(0, expResults.length)) {
+            text.add(word.getText());
+        }
+
+        assertArrayEquals(expResults, text.toArray());
+    }
+
+    /**
+     * Test of getSegmentedRegions method, of class Tesseract1.
+     * 
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testGetSegmentedRegions() throws Exception {
+        logger.info("getSegmentedRegions at given TessPageIteratorLevel");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        int level = TessPageIteratorLevel.RIL_SYMBOL;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(level, TessPageIteratorLevel.class));
+        List<Rectangle> result = instance.getSegmentedRegions(bi, level);
+        for (int i = 0; i < result.size(); i++) {
+            Rectangle rect = result.get(i);
+            logger.info(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d", i, rect.x, rect.y, rect.width, rect.height));
+        }
+
+        assertTrue(result.size() > 0);
+    }
+}

Tess4J/test/net/sourceforge/tess4j/TesseractTest.java

@@ -0,0 +1,267 @@
+/**
+ * Copyright @ 2010 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package net.sourceforge.tess4j;
+
+import java.awt.Rectangle;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+
+import net.sourceforge.tess4j.util.ImageHelper;
+import net.sourceforge.tess4j.util.ImageIOHelper;
+import net.sourceforge.tess4j.util.LoggHelper;
+import net.sourceforge.tess4j.util.Utils;
+
+import net.sourceforge.tess4j.ITesseract.RenderedFormat;
+import net.sourceforge.tess4j.ITessAPI.TessPageIteratorLevel;
+
+import static org.junit.Assert.*;
+
+import com.recognition.software.jdeskew.ImageDeskew;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TesseractTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    static final double MINIMUM_DESKEW_THRESHOLD = 0.05d;
+    ITesseract instance;
+
+    private final String datapath = ".";
+    private final String testResourcesDataPath = "test/resources/test-data";
+    private final String expOCRResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws Exception {
+    }
+
+    @Before
+    public void setUp() {
+        instance = new Tesseract();
+        instance.setDatapath(new File(datapath).getPath());
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File() throws Exception {
+        logger.info("doOCR on a PNG image");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_UNLV_Zone_File() throws Exception {
+        logger.info("doOCR on a PNG image with UNLV zone file .uzn");
+        //UNLV zone format: left top width height label
+        File imageFile = new File(testResourcesDataPath, "eurotext_unlv.png");
+        String expResult = "& duck/goose, as 12.5% of E-mail\n\n"
+                + "from aspammer@website.com is spam.\n\n"
+                + "The (quick) [brown] {fox} jumps!\n"
+                + "Over the $43,456.78 <lazy> #90 dog";
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertEquals(expResult, result.trim());
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File_With_Configs() throws Exception {
+        logger.info("doOCR with configs");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        String expResult = "[-0123456789.\n ]+";
+        List<String> configs = Arrays.asList("digits");
+        instance.setConfigs(configs);
+        String result = instance.doOCR(imageFile);
+        logger.info(result);
+        assertTrue(result.matches(expResult));
+        instance.setConfigs(null); // since Tesseract instance is a singleton, clear configs so the effects do not carry on into subsequent runs.
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_File_Rectangle() throws Exception {
+        logger.info("doOCR on a BMP image with bounding rectangle");
+        File imageFile = new File(testResourcesDataPath, "eurotext.bmp");
+        Rectangle rect = new Rectangle(0, 0, 1024, 800); // define an equal or smaller region of interest on the image
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageFile, rect);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_PDF() throws Exception {
+        logger.info("doOCR on a PDF document");
+        File imageFile = new File(testResourcesDataPath, "eurotext.pdf");
+        List<IIOImage> imageList = ImageIOHelper.getIIOImageList(imageFile);
+        String expResult = expOCRResult;
+        String result = instance.doOCR(imageList, null);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of doOCR method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_BufferedImage() throws Exception {
+        logger.info("doOCR on a buffered image of a PNG");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        String expResult = expOCRResult;
+        String result = instance.doOCR(bi);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of deskew algorithm.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testDoOCR_SkewedImage() throws Exception {
+        logger.info("doOCR on a skewed PNG image");
+        File imageFile = new File(testResourcesDataPath, "eurotext_deskew.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        ImageDeskew id = new ImageDeskew(bi);
+        double imageSkewAngle = id.getSkewAngle(); // determine skew angle
+        if ((imageSkewAngle > MINIMUM_DESKEW_THRESHOLD || imageSkewAngle < -(MINIMUM_DESKEW_THRESHOLD))) {
+            bi = ImageHelper.rotateImage(bi, -imageSkewAngle); // deskew image
+        }
+
+        String expResult = expOCRResult;
+        String result = instance.doOCR(bi);
+        logger.info(result);
+        assertEquals(expResult, result.substring(0, expResult.length()));
+    }
+
+    /**
+     * Test of createDocuments method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testCreateDocuments() throws Exception {
+        logger.info("createDocuments for multiple images");
+        File imageFile1 = new File(testResourcesDataPath, "eurotext.pdf");
+        File imageFile2 = new File(testResourcesDataPath, "eurotext.png");
+        String outputbase1 = "test/test-results/docrenderer-1";
+        String outputbase2 = "test/test-results/docrenderer-2";
+        List<RenderedFormat> formats = new ArrayList<RenderedFormat>(Arrays.asList(RenderedFormat.HOCR, RenderedFormat.PDF, RenderedFormat.TEXT));
+        instance.createDocuments(new String[]{imageFile1.getPath(), imageFile2.getPath()}, new String[]{outputbase1, outputbase2}, formats);
+        assertTrue(new File(outputbase1 + ".pdf").exists());
+    }
+
+    /**
+     * Test of getWords method, of class Tesseract.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testGetWords() throws Exception {
+        logger.info("getWords");
+        File imageFile = new File(testResourcesDataPath, "eurotext.tif");
+
+        String expResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
+        String[] expResults = expResult.split("\\s");
+
+        int pageIteratorLevel = TessPageIteratorLevel.RIL_WORD;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(pageIteratorLevel, TessPageIteratorLevel.class));
+        BufferedImage bi = ImageIO.read(imageFile);
+        List<Word> result = instance.getWords(bi, pageIteratorLevel);
+
+        //print the complete result
+        for (Word word : result) {
+            logger.info(word.toString());
+        }
+
+        List<String> text = new ArrayList<String>();
+        for (Word word : result.subList(0, expResults.length)) {
+            text.add(word.getText());
+        }
+
+        assertArrayEquals(expResults, text.toArray());
+    }
+
+    /**
+     * Test of getSegmentedRegions method, of class Tesseract.
+     * 
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testGetSegmentedRegions() throws Exception {
+        logger.info("getSegmentedRegions at given TessPageIteratorLevel");
+        File imageFile = new File(testResourcesDataPath, "eurotext.png");
+        BufferedImage bi = ImageIO.read(imageFile);
+        int level = TessPageIteratorLevel.RIL_SYMBOL;
+        logger.info("PageIteratorLevel: " + Utils.getConstantName(level, TessPageIteratorLevel.class));
+        List<Rectangle> result = instance.getSegmentedRegions(bi, level);
+        for (int i = 0; i < result.size(); i++) {
+            Rectangle rect = result.get(i);
+            logger.info(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d", i, rect.x, rect.y, rect.width, rect.height));
+        }
+
+        assertTrue(result.size() > 0);
+    }
+}

Tess4J/test/net/sourceforge/tess4j/TestFolderExtraction.java

@@ -0,0 +1,84 @@
+/**
+ * Copyright @ 2008 Quan Nguyen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package net.sourceforge.tess4j;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+
+import net.sourceforge.tess4j.util.LoadLibs;
+
+import net.sourceforge.tess4j.util.LoggHelper;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TestFolderExtraction {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+
+    @Test
+    public void testFolderExtraction() {
+
+        File tessDataFolder = null;
+        
+        try {
+
+            /**
+             * Loads the image from resources.
+             */
+            String filename = String.format("%s/%s", "/test-data", "eurotext.pdf");
+            URL defaultImage = getClass().getResource(filename);
+            File imageFile = new File(defaultImage.toURI());
+
+            /**
+             * Extracts <code>tessdata</code> folder into a temp folder.
+             */
+            logger.info("Loading the tessdata folder into a temporary folder.");
+            tessDataFolder = LoadLibs.extractTessResources("tessdata");
+            
+            /**
+             * Gets tesseract instance and sets data path.
+             */
+            ITesseract instance = new Tesseract();
+            
+            if (tessDataFolder != null) {
+                logger.info(tessDataFolder.getAbsolutePath());
+                instance.setDatapath(tessDataFolder.getParent());
+            }
+
+            /**
+             * Performs OCR on the image.
+             */
+            String result = instance.doOCR(imageFile);
+            logger.info(result);
+
+        } catch (TesseractException e) {
+            logger.error(e.getMessage());
+            logger.error(e.getMessage(), e);
+        } catch (URISyntaxException e) {
+            logger.error(e.getMessage(), e);
+        }
+        
+        // checks if tessdata folder exists
+        assertTrue(tessDataFolder != null && tessDataFolder.exists());
+    }
+
+}

Tess4J/test/net/sourceforge/tess4j/Word.java

@@ -0,0 +1,45 @@
+package net.sourceforge.tess4j;
+
+import java.awt.Rectangle;
+
+/**
+ * Encapsulates Tesseract results.
+ */
+class Word {
+
+    private final String text;
+    private final float confidence;
+    private final Rectangle rect;
+
+    public Word(String text, float confidence, Rectangle rect) {
+        this.text = text;
+        this.confidence = confidence;
+        this.rect = rect;
+    }
+
+    /**
+     * @return the text
+     */
+    public String getText() {
+        return text;
+    }
+
+    /**
+     * @return the confidence
+     */
+    public float getConfidence() {
+        return confidence;
+    }
+
+    /**
+     * @return the bounding box
+     */
+    public Rectangle getRect() {
+        return rect;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s\t[Confidence: %f Bounding box: %d %d %d %d]", text, confidence, rect.x, rect.y, rect.width, rect.height);
+    }
+}

Tess4J/test/net/sourceforge/tess4j/util/PdfUtilitiesTest.java

@@ -0,0 +1,128 @@
+/*
+ * Copyright 2014 Quan Nguyen.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package net.sourceforge.tess4j.util;
+
+import java.io.File;
+import java.io.IOException;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import static org.junit.Assert.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class PdfUtilitiesTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
+    private final String TEST_RESOURCES_DATA_PATH = "test/resources/test-data";
+
+    @BeforeClass
+    public static void setUpClass() {
+    }
+
+    @AfterClass
+    public static void tearDownClass() {
+    }
+
+    @Before
+    public void setUp() {
+        System.setProperty(PdfUtilities.PDF_LIBRARY, PdfUtilities.PDFBOX);    // Note: comment out to test Ghostscript
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    /**
+     * Test of convertPdf2Tiff method, of class PdfUtilities.
+     *
+     * @throws java.lang.Exception
+     */
+    @Test
+    public void testConvertPdf2Tiff() throws Exception {
+        logger.info("convertPdf2Tiff");
+        File inputPdfFile = new File(TEST_RESOURCES_DATA_PATH, "eurotext.pdf");
+        File result = PdfUtilities.convertPdf2Tiff(inputPdfFile);
+        result.deleteOnExit();
+        assertTrue(result.exists());
+    }
+
+    /**
+     * Test of convertPdf2Png method, of class PdfUtilities.
+     *
+     * @throws java.io.IOException
+     */
+    @Test
+    public void testConvertPdf2Png() throws IOException {
+        logger.info("convertPdf2Png");
+        File inputPdfFile = new File(TEST_RESOURCES_DATA_PATH, "eurotext.pdf");
+        File[] results = PdfUtilities.convertPdf2Png(inputPdfFile);
+        assertTrue(results.length > 0);
+
+        //clean up
+        File parentDir = results[0].getParentFile();
+        for (File result : results) {
+            result.delete();
+        }
+        parentDir.delete();
+    }
+
+    /**
+     * Test of splitPdf method, of class PdfUtilities.
+     */
+    @Test
+    public void testSplitPdf() {
+        logger.info("splitPdf");
+        File inputPdfFile = new File(TEST_RESOURCES_DATA_PATH, "multipage-pdf.pdf");
+        File outputPdfFile = new File("test/test-results/multipage-pdf_splitted.pdf");
+        int startPage = 2;
+        int endPage = 3;
+        int expResult = 2;
+        PdfUtilities.splitPdf(inputPdfFile, outputPdfFile, startPage, endPage);
+        int pageCount = PdfUtilities.getPdfPageCount(outputPdfFile);
+        assertEquals(expResult, pageCount);
+    }
+
+    /**
+     * Test of getPdfPageCount method, of class PdfUtilities.
+     */
+    @Test
+    public void testGetPdfPageCount() {
+        logger.info("getPdfPageCount");
+        File inputPdfFile = new File(TEST_RESOURCES_DATA_PATH, "multipage-pdf.pdf");
+        int expResult = 5;
+        int result = PdfUtilities.getPdfPageCount(inputPdfFile);
+        assertEquals(expResult, result);
+    }
+
+    /**
+     * Test of mergePdf method, of class PdfUtilities.
+     */
+    @Test
+    public void testMergePdf() {
+        logger.info("mergePdf");
+        File pdfPartOne = new File(TEST_RESOURCES_DATA_PATH, "eurotext.pdf");
+        File pdfPartTwo = new File(TEST_RESOURCES_DATA_PATH, "multipage-pdf.pdf");
+        int expResult = 6;
+        File outputPdfFile = new File("test/test-results", "multipage-pdf_merged.pdf");
+        File[] inputPdfFiles = {pdfPartOne, pdfPartTwo};
+        PdfUtilities.mergePdf(inputPdfFiles, outputPdfFile);
+        assertEquals(expResult, PdfUtilities.getPdfPageCount(outputPdfFile));
+    }
+
+}

Tess4J/test/resources/test-data/eurotext_unlv.uzn

@@ -0,0 +1,3 @@
+97 162 747 50 ThirdLine
+97 209 828 55 FourthLine
+92 56 810 107 First2Lines

Tess4J/versionchanges.txt

@@ -0,0 +1,137 @@
+Tess4J Change Summary
+
+Version 0.1 - initial release (14 Aug 2010):
+- Java JNA-based wrapper for Tesseract OCR DLL 2.04
+- Support uncompressed, binary TIFF images
+
+Version 0.2 (16 Aug 2010):
+- Add support for more image formats (PNG, BMP, GIF, PDF, JPEG)
+- Add support for compressed, grayscale and colored images
+
+Version 0.3 (22 Aug 2010):
+- Include API support for BufferedImage
+- Clean up codes. Remove unsupported API and files
+- Document the API
+
+Version 0.3.1 (26 Aug 2010):
+- Send only pixel data, not whole image data, to Tesseract engine, to fix a bug that has erroneously put some words at beginning of line towards end of line
+
+Version 0.4 (1 Nov 2010):
+- Add JNA Direct Mapping calls, which can provide performance near that of custom JNI
+
+Version 1.0 (30 October 2012):
+- Upgrade to Tesseract 3.02 (r798), which is not backward compatible with Tesseract 2.04. 
+- Implement a new JNA wrapper for the new Tesseract OCR API
+- Add more unit test cases
+- Update documentation
+
+Version 1.1 (3 March 2013)
+- Update Tesseract DLL to r828
+- Additional API methods, image helper methods, and unit test cases
+- Improve handling of Unicode character encoding
+- Fix memory leaks
+- Add support for determining skew angle and image rotation
+
+Version 1.2 (22 September 2013)
+- Update Tesseract DLL to r866
+- More efficient OCR of multiple images
+- Various minor improvements
+- Update JNA to v4.0
+
+Version 1.3 (31 May 2014)
+- Update JNA to v4.1.0
+- Update Ghost4J to v0.5.1
+- Refactoring
+- Bundle Tesseract and Leptonica 64-bit DLLs
+
+Version 1.4 (18 January 2015)
+- Refactor to reduce code duplication
+- Embed Windows native resources in JAR
+- Autoload Windows native libraries
+
+Version 1.4.1 (24 January 2015)
+- Enable use of jna.library.path system property for user-customizable path
+
+Version 1.5 (13 March 2015)
+- Add UNLV zone file support
+- Refactor
+
+Version 2.0 (29 March 2015)
+- Upgrade to Tesseract 3.03 (r1050), which is compatible with Tesseract 3.03RC on Linux
+- Refactor Tesseract class for extensibility and thread-safety
+- Update English language data for Tesseract 3.02
+
+Version 3.0 (25 December 2015)
+- Upgrade to Tesseract 3.04 (953523b)
+- Include Lept4J library
+- Incorporate slf4j and logback libraries for logging
+- Make GhostScript calls thread safe
+
+Version 3.1 (21 March 2016)
+- Update Tesseract to 3.04.01 (4ef68a0)
+- Use Lept4J-1.1.2 (Leptonica 1.72)
+- Update JNA to 4.2.2
+- Update Ghost4J to 1.0.1
+- Delete ResultRenderer after use to release PDF file handler
+
+Version 3.2 (15 May 2016)
+- Revert JNA to 4.1.0 due to "Invalid calling convention 63" errors invoking GhostScript via Ghost4J on Linux
+- Update Lept4J to 1.2.2 (Leptonica 1.73)
+- Recompile Tesseract 3.04.01 DLL against Leptonica 1.73
+- Update GhostScript Windows binary to 9.19
+
+Version 3.2.1 (29 May 2016)
+- Properly release Box and Boxa resources
+- Update Lept4J to 1.2.3
+
+Version 3.2.2 (16 February 2017)
+- Update GhostScript to 9.20
+- Fix possible NPE with PDF-related codes
+- Update dependencies
+- Additional image utility methods
+
+Version 3.3.0 (16 February 2017)
+- Upgrade to Tesseract 3.05 (2ca5d0a)
+- Update Lept4J to 1.3.0 (Leptonica 1.74.1)
+
+Version 3.3.1 (23 March 2017)
+- Update Lept4J to 1.3.1
+- Update other dependencies
+
+Version 3.4.0 (1 June 2017)
+- Upgrade to Tesseract 3.05.01 (2158661)
+- Update Lept4J to 1.4.0
+- Add support for jboss-vfs protocol
+
+Version 3.4.1 (22 September 2017)
+- Not extract/copy native resource if it exists and has same file size
+- Update Tesseract 3.05.01 (e2e79c4); link against Leptonica 1.74.4
+- Update Lept4J to 1.6.1
+
+Version 3.4.2 (14 November 2017)
+- Update Lept4J to 1.6.2
+- Update GhostScript to 9.22
+- Improve handling of PDF files in multi-threaded environment
+- Lift limits on number of pages in PDF
+- Use TESSDATA_PREFIX environment variable by default, if defined
+
+Version 3.4.3 (14 January 2018)
+- Not extract/copy resource if it exists and has same file size
+
+Version 3.4.4 (22 February 2018)
+- Exclude logback.xml from JAR
+- Add image rotate and deskew methods
+- Update Lept4J to 1.6.3
+
+Version 3.4.5 (21 March 2018)
+- Remove GS DLL due to license incompatibility
+- Use PDFBox
+
+Version 3.4.6 (25 March 2018)
+- Update PDFBox dependencies
+
+Version 3.4.7 (16 April 2018)
+- Update jai-imageio-core to 1.4.0 for Java 9 fixes
+
+Version 3.4.8 (2 May 2018)
+- Fix a path issue when extracting resources from JAR to temp directory on Windows server

src/main/java/com/smart/module/car/web/DistinguishController.java

@@ -15,8 +15,8 @@ import com.smart.module.car.repository.ParkManageRepository;
 import com.smart.module.car.service.CarManageService;
 import com.smart.module.car.service.CarParkingRecordService;
 import com.smart.module.car.util.BaiDuUtils;
-import net.sourceforge.tess4j.ITesseract;
-import net.sourceforge.tess4j.Tesseract;
+//import net.sourceforge.tess4j.ITesseract;
+//import net.sourceforge.tess4j.Tesseract;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
@@ -25,7 +25,7 @@ import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.File;
-import java.io.IOException;
+//import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -89,34 +89,34 @@ public class DistinguishController {
                 String imagePath = SystemConstant.FILE + "/" + fileDay+"/"+fileName;
                 // 构建图片路径，用于存储到数据库中
 
-//                String plateNumber = baiDuUtils.plateLicense(imageFile.getAbsolutePath());
-//                // 调用百度工具类进行车牌识别
-//
-//                if(StringUtils.isBlank(plateNumber)){
-//                    return Result.error("识别失败");
-//                }
-//                // 如果识别结果为空，则返回识别失败的错误提示
-
-                ITesseract instance = new Tesseract();
+                String plateNumber = baiDuUtils.plateLicense(imageFile.getAbsolutePath());
+                // 调用百度工具类进行车牌识别
 
-                String tessData = "C:\\Users\\Re11a\\Downloads\\smart-parking\\Tess4J";//tess4j 解压地址
-                File directory = new File(tessData);
-                String courseFile = null;
-                try {
-                    courseFile = directory.getCanonicalPath();
-                } catch (IOException e) {
-                    e.printStackTrace();
+                if(StringUtils.isBlank(plateNumber)){
+                    return Result.error("识别失败");
                 }
-                //设置训练库的位置
-                instance.setDatapath(courseFile + "//tessdata");
-                instance.setLanguage("chi_sim+eng");//chi_sim ：简体中文， eng	根据需求选择语言库
-                String plateNumber = instance.doOCR(imageFile);//.replaceAll("\\s", ""); // 进行OCR识别，并去除空格
+                // 如果识别结果为空，则返回识别失败的错误提示
 
-                    if (plateNumber.isEmpty()) {
-                        System.out.println("识别失败");
-                    } else {
-                        System.out.println("车牌号：" + plateNumber);
-                    }
+//                ITesseract instance = new Tesseract();
+//
+//                String tessData = "C:\\Users\\Re11a\\Downloads\\smart-parking\\Tess4J";//tess4j 解压地址
+//                File directory = new File(tessData);
+//                String courseFile = null;
+//                try {
+//                    courseFile = directory.getCanonicalPath();
+//                } catch (IOException e) {
+//                    e.printStackTrace();
+//                }
+//                //设置训练库的位置
+//                instance.setDatapath(courseFile + "//tessdata");
+//                instance.setLanguage("chi_sim+eng");//chi_sim ：简体中文， eng	根据需求选择语言库
+//                String plateNumber = instance.doOCR(imageFile);//.replaceAll("\\s", ""); // 进行OCR识别，并去除空格
+//
+//                    if (plateNumber.isEmpty()) {
+//                        System.out.println("识别失败");
+//                    } else {
+//                        System.out.println("车牌号：" + plateNumber);
+//                    }
 
                 Map<String, Object> map = new HashMap<>();
                 map.put("plateNumber",plateNumber);