diff --git a/sub_windows/sub_window_3.py b/sub_windows/sub_window_3.py
index dc026cf..ebf857b 100644
--- a/sub_windows/sub_window_3.py
+++ b/sub_windows/sub_window_3.py
@@ -81,7 +81,7 @@ class SubWindow(QMainWindow):
     def open_file(self):
         file_path, file_type = QFileDialog.getOpenFileName(QFileDialog(), '选择图片', '', '*.jpg *.bmp *.png *tif')
         self.cv_srcImage = cv2.imread(file_path)
-        if self.cv_srcImage is None:
+        if self.cv_srcImage is not None:
             height, width, channels = self.cv_srcImage.shape
             ui_image = QImage(cv2.cvtColor(self.cv_srcImage, cv2.COLOR_BGR2RGB), width, height, QImage.Format_RGB888)
             if width > height:
diff --git a/sub_windows/sub_window_4.py b/sub_windows/sub_window_4.py
index dae3e89..efb7965 100644
--- a/sub_windows/sub_window_4.py
+++ b/sub_windows/sub_window_4.py
@@ -54,7 +54,7 @@ class SubWindow(QMainWindow):
             QFileDialog(), "选择图片", "", "图像文件(*.jpg *.bmp *.png)"
         )
         self.cv_srcImage = cv2.imread(file_path)
-        if self.cv_srcImage is None:
+        if self.cv_srcImage is not None:
             height, width, channels = self.cv_srcImage.shape
             ui_image = QImage(
                 cv2.cvtColor(self.cv_srcImage, cv2.COLOR_BGR2RGB),