added python version

2 files changed, 83 insertions, 0 deletions

diff --git a/opencv-qt-integration-2/README.md b/opencv-qt-integration-2/README.md
index f96093a..3fb312a 100644
--- a/opencv-qt-integration-2/README.md
+++ b/opencv-qt-integration-2/README.md
@@ -5,6 +5,8 @@ This code sample shows you how to do basic image manipulation to an image and di
 
 ![screenshot](http://i.imgur.com/OPCiEw8.png)
 
+The same program written in Python is available in the `python/` directory.
+
 To compile and run the code, you need to have Qt 5 installed on your computer. The code is successfully tested on the following environment:
 
  - Mac OS X Mavericks
diff --git a/opencv-qt-integration-2/python/ImageApp.py b/opencv-qt-integration-2/python/ImageApp.py
new file mode 100644
index 0000000..7745711
--- /dev/null
+++ b/opencv-qt-integration-2/python/ImageApp.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+# encoding: utf-8
+
+import os
+import sys
+
+try:
+    from PyQt5.QtCore import *
+    from PyQt5.QtGui import *
+    from PyQt5.QtWidgets import *
+    import cv2
+except ImportError:
+    print("Please install the required modules.")
+    sys.exit()
+
+
+class ImageApp(QWidget):
+
+    def __init__(self):
+        QWidget.__init__(self)
+        self.original_img = cv2.imread("../../assets/The_Chapter_House.jpg")
+        if self.original_img is not None:
+            self.original_img = cv2.cvtColor(self.original_img, cv2.COLOR_BGR2RGB)
+        self.setup_ui()
+        self.show_image(self.original_img)
+
+    def setup_ui(self):
+        """Setup the UI widgets."""
+        self.image_label = QLabel()
+        # Setup buttons
+        self.original_btn = QPushButton("Original")
+        self.original_btn.clicked.connect(self.show_original_image)
+        self.blur_btn = QPushButton("Gaussian Blur")
+        self.blur_btn.clicked.connect(self.do_gaussian_blur)
+        self.canny_btn = QPushButton("Canny")
+        self.canny_btn.clicked.connect(self.do_canny)
+        self.quit_btn = QPushButton("Quit")
+        self.quit_btn.clicked.connect(self.close)
+        # Setup layout for buttons
+        self.buttons_layout = QVBoxLayout()
+        self.buttons_layout.addWidget(self.original_btn)
+        self.buttons_layout.addWidget(self.blur_btn)
+        self.buttons_layout.addWidget(self.canny_btn)
+        self.buttons_layout.addStretch()
+        self.buttons_layout.addWidget(self.quit_btn)
+        # Setup main layout
+        self.main_layout = QHBoxLayout()
+        self.main_layout.addWidget(self.image_label)
+        self.main_layout.addLayout(self.buttons_layout)
+        self.setLayout(self.main_layout)
+        self.setWindowTitle("Image Processing with Qt and OpenCV")
+
+    def show_original_image(self):
+        """Redraw original image."""
+        self.show_image(self.original_img)
+
+    def do_gaussian_blur(self):
+        """Perform Canny edge detection on original image and display the result."""
+        img = cv2.GaussianBlur(self.original_img, (15, 15), 0, 0)
+        self.show_image(img)
+
+    def do_canny(self):
+        """Perform Gaussian blurring on original image and display the result."""
+        img = cv2.cvtColor(self.original_img, cv2.COLOR_RGB2GRAY)
+        img = cv2.Canny(img, 150, 150)
+        img = cv2.cvtColor(img, cv2.COLOR_GRAY2RGB)
+        self.show_image(img)
+
+    def show_image(self, img):
+        if img is not None:
+            img_ = QImage(img.data, img.shape[1], img.shape[0], QImage.Format_RGB888)
+            self.image_label.setPixmap(QPixmap.fromImage(img_))
+        else:
+            self.image_label.setText("Cannot load the input image!")
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    image_app = ImageApp()
+    image_app.show()
+    app.exec_()