parking/park/ai.cpp

// ai.cpp
#include "ai.h"
#include "ui_ai.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QFileDialog>
#include <QNetworkRequest>
#include <QFile>
#include <QNetworkReply>
#include <QUrl>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QMovie>
#include <QtTextToSpeech/QTextToSpeech>
#include <QBuffer>
#include <QString>
#include "message.h"
#include <QSqlQuery>
#include <QSqlDatabase>
#include <QMessageBox>

ai::ai(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ai)
{
    // 显示车牌图片
    lb_pix = new QLabel;
    lb_pix->setFixedSize(490, 350);
    lb_pix->setScaledContents(true);
    // 加载并显示名为 'fen.png' 的图片
    QPixmap pixmap(":/fen.png");  // 假设图片文件已添加到 Qt 的资源文件中
    pixmap = pixmap.scaled(lb_pix->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
    lb_pix->setPixmap(pixmap);

    // 设置窗口的背景图片
    lb_pix->setStyleSheet("background-image: url(:/fen.png);"
                         "background-position: center;"
                         "background-repeat: no-repeat;"
                         "background-size: cover;");

    // 设置载入车牌按钮
    btn_load = new QPushButton("载入车牌");
    btn_load->setFixedSize(90, 45);
    btn_load->setStyleSheet("QPushButton {"
                            "background-color: qlineargradient(spread:pad, x1:0.52, y1:1, x2:0.54, y2:0, "
                            "stop:0.0112994 rgba(173, 216, 230, 255), "
                            "stop:1 rgba(204, 229, 255, 255)); "
                            "color: rgb(255, 255, 255); "
                            "border: 2px solid rgba(170, 255, 255, 200); "
                            "border-radius: 10px; "
                            "padding: 5px 10px; "
                            "font: 16pt \"Candara\"; "
                            "box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);"
                            "}"
                            "QPushButton:hover {"
                            "background-color: qlineargradient(spread:pad, x1:0.52, y1:1, x2:0.54, y2:0, "
                            "stop:0.0112994 rgba(204, 229, 255, 255), "
                            "stop:1 rgba(173, 216, 230, 255)); "
                            "border: 2px solid rgba(173, 216, 230, 255);"
                            "}"
                            "QPushButton:pressed {"
                            "background-color: rgba(204, 229, 255, 150); "
                            "box-shadow: inset 0px 0px 5px rgba(0, 0, 0, 0.2);"
                            "}");

    // 设置识别按钮
    btn_decode = new QPushButton("识别");
    btn_decode->setFixedSize(90, 45);
    btn_decode->setStyleSheet("QPushButton {"
                              "background-color: qlineargradient(spread:pad, x1:0.52, y1:1, x2:0.54, y2:0, "
                              "stop:0.0112994 rgba(173, 216, 230, 255), "
                              "stop:1 rgba(204, 229, 255, 255)); "
                              "color: rgb(255, 255, 255); "
                              "border: 2px solid rgba(170, 255, 255, 200); "
                              "border-radius: 10px; "
                              "padding: 5px 10px; "
                              "font: 16pt \"Candara\"; "
                              "box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);"
                              "}"
                              "QPushButton:hover {"
                              "background-color: qlineargradient(spread:pad, x1:0.52, y1:1, x2:0.54, y2:0, "
                              "stop:0.0112994 rgba(204, 229, 255, 255), "
                              "stop:1 rgba(173, 216, 230, 255)); "
                              "border: 2px solid rgba(173, 216, 230, 255);"
                              "}"
                              "QPushButton:pressed {"
                              "background-color: rgba(204, 229, 255, 150); "
                              "box-shadow: inset 0px 0px 5px rgba(0, 0, 0, 0.2);"
                              "}");


    // 设置车牌路径输入框
    le_path = new QLineEdit;
    le_path->setPlaceholderText("车牌图片路径：");
    le_path->setMinimumHeight(30);
    le_path->setStyleSheet("QLineEdit {"
                           "border: 1px solid rgba(170, 255, 255, 200); "
                           "border-radius: 10px; "
                           "padding: 5px 10px; "
                           "font: 15pt \"微软雅黑\";"
                           "}");


    // 设置识别结果输入框
    le_code = new QLineEdit;
    le_code->setPlaceholderText("识别结果：");
    le_code->setMinimumHeight(33);
    le_code->setStyleSheet("QLineEdit {"
                           "border: 1px solid rgba(170, 255, 255, 200); "
                           "border-radius: 10px; "
                           "padding: 5px 10px; "
                           "font: 18pt \"微软雅黑\";"

                           "}");

    speeker = new QTextToSpeech;
    httpmanager = new QNetworkAccessManager;
    connect(httpmanager, SIGNAL(finished(QNetworkReply*)), this, SLOT(read_ack(QNetworkReply*)));

//    // 2. 排版
    QHBoxLayout *hbox = new QHBoxLayout;
    hbox->addWidget(btn_load);
    hbox->addWidget(btn_decode);

    QVBoxLayout *mainbox = new QVBoxLayout;
//    车牌图片
    mainbox->addWidget(lb_pix);

    mainbox->addWidget(le_path);
    mainbox->addWidget(le_code);

    mainbox->addLayout(hbox);
    setLayout(mainbox);

    // 5. 前后台挂接
    connect(btn_load, SIGNAL(clicked(bool)), this, SLOT(load_pix()));
    connect(btn_decode, SIGNAL(clicked(bool)), this, SLOT(decode_pix()));
    mes = new message;
    connect(this, SIGNAL(mySignals(QString)), mes, SLOT(mySlot(QString)));
    connect(this, SIGNAL(Signal_out(QString)), mes, SLOT(Slot_out(QString)));

}

void ai::load_pix()
{
    QString filename = QFileDialog::getOpenFileName(this, "打开车牌照片", ".", "Images (*.png *.bmp *.jpg)");
    if (filename.isEmpty()) {
        return;  // 如果没有选择文件，直接返回
    }

    QPixmap pixmap(filename);
    if (!pixmap.isNull()) {
        // 调整图片大小，以适应QLabel的大小
        pixmap = pixmap.scaled(lb_pix->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
        lb_pix->setPixmap(pixmap);
    } else {

        qDebug() << "无法加载图片";
    }
    le_path->setText(filename);
}


void ai::decode_pix()
{
    // 向百度发送一个二维码识别请求（HTTP）
    QNetworkRequest myrequset;

    // 填充请求url
    myrequset.setUrl(QUrl("https://aip.baidubce.com/rest/2.0/ocr/v1/license_plate?access_token=24.45460c2347791a4df2f2eaf275fe956c.2592000.1737857078.282335-116856660"));
    // 填充header
    myrequset.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

    // 填充请求的body
    // 1. 挖出照片内容
    QFile file(le_path->text());
    file.open(QIODevice::ReadOnly);
    QByteArray buf = file.readAll();

    // 2. 转成base64及urlcode
    QByteArray buf64 = buf.toBase64().toPercentEncoding();
    QByteArray body = "image=" + buf64;
    // 发送完整的一次识别请求
    httpmanager->post(myrequset, body);
}

// 结果解析
void ai::read_ack(QNetworkReply *r)
{
    // 提取json格式的返回
    QByteArray buf = r->readAll();
    qDebug() << buf;

    // 提取json中的内容
    QJsonDocument myjson = QJsonDocument::fromJson(buf);
    QJsonObject node = myjson.object();
    QJsonObject arr = node.value("words_result").toObject();
    QString text = arr.value("number").toString();
    le_code->setText(text);
    speeker->say(text+"已识别");
    speeker->setVolume(1.0);  // 设置最大音量
    speeker->setRate(-0.2);   //放慢速度


    // 判断是否已经进入
    QSqlDatabase db = QSqlDatabase::database("text01");  // 使用相同的连接名 "text01"
    if (!db.isOpen() && !db.open()) {
        qDebug() << "数据库连接失败！";
        return;
    }

    QString number = QString("SELECT * FROM car_number WHERE number='%1'").arg(text);
    QSqlQuery query(db);

    if (query.exec(number) && query.next()) {
        emit Signal_out(text);
    } else {
        emit mySignals(text);
    }
}

ai::~ai()
{
    delete ui;
    delete mes;
}