From aaf97a89331b21d4152fbbf26bcae846db44c3d0 Mon Sep 17 00:00:00 2001
From: Nash <nash@bsd-noobz.com>
Date: Sun, 31 Aug 2014 12:11:34 +0700
Subject: added more advanced opencv-qt integration

---
 opencv-qt-integration-2/ImageApp.cpp | 92 ++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 opencv-qt-integration-2/ImageApp.cpp

(limited to 'opencv-qt-integration-2/ImageApp.cpp')

diff --git a/opencv-qt-integration-2/ImageApp.cpp b/opencv-qt-integration-2/ImageApp.cpp
new file mode 100644
index 0000000..5833bd8
--- /dev/null
+++ b/opencv-qt-integration-2/ImageApp.cpp
@@ -0,0 +1,92 @@
+#include <opencv2/imgproc/imgproc.hpp>
+#include <opencv2/highgui/highgui.hpp>
+#include <QtWidgets>
+#include "ImageApp.h"
+
+ImageApp::ImageApp()
+{
+	originalImage = cv::imread("../assets/The_Chapter_House.jpg");
+	if (originalImage.data) {
+		cv::cvtColor(originalImage, originalImage, cv::COLOR_BGR2RGB);
+	}
+	setupUi();
+	showImage(originalImage);
+}
+
+/**
+ * Setup the widgets
+ */
+void ImageApp::setupUi()
+{
+	imageLabel = new QLabel();
+
+	originalButton = new QPushButton("Original");	
+	connect(originalButton, SIGNAL(clicked()), this, SLOT(showOriginalImage()));
+
+	blurButton = new QPushButton("Gaussian Blur");
+	connect(blurButton, SIGNAL(clicked()), this, SLOT(doGaussianBlur()));
+
+	cannyButton = new QPushButton("Canny");
+	connect(cannyButton, SIGNAL(clicked()), this, SLOT(doCanny()));
+
+	quitButton = new QPushButton("Quit");
+	connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+
+	buttonsLayout = new QVBoxLayout();
+	buttonsLayout->addWidget(originalButton);
+	buttonsLayout->addWidget(blurButton);
+	buttonsLayout->addWidget(cannyButton);
+	buttonsLayout->addStretch();
+	buttonsLayout->addWidget(quitButton);
+
+	mainLayout = new QHBoxLayout();
+	mainLayout->addWidget(imageLabel);
+
+	if (originalImage.data) {
+		mainLayout->addLayout(buttonsLayout);
+	}
+	setLayout(mainLayout);
+	setWindowTitle("Image Processing with Qt and OpenCV");
+}
+
+/**
+ * Redraw original image
+ */
+void ImageApp::showOriginalImage()
+{
+	showImage(originalImage);
+}
+
+/**
+ * Perform Canny edge detection on original image and display the result
+ */
+void ImageApp::doCanny()
+{
+	cv::Mat gray;
+	cv::cvtColor(originalImage, gray, cv::COLOR_RGB2GRAY);
+	cv::Canny(gray, processedImage, 150, 150);
+	cv::cvtColor(processedImage, processedImage, cv::COLOR_GRAY2RGB);
+	showImage(processedImage);
+}
+
+/**
+ * Perform Gaussian blurring on original image and display the result
+ */
+void ImageApp::doGaussianBlur()
+{
+	cv::GaussianBlur(originalImage, processedImage, cv::Size(15, 15), 0, 0);
+	showImage(processedImage);
+}
+
+/**
+ * Draw OpenCV matrix using QLabel
+ */
+void ImageApp::showImage(cv::Mat img)
+{
+	if (img.data) {
+		QImage _img(img.data, img.cols, img.rows, QImage::Format_RGB888);
+		imageLabel->setPixmap(QPixmap::fromImage(_img));
+	} else {
+		imageLabel->setText("Cannot load the input image!");
+	}
+}
-- 
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