OpenCV with Qt C++ Examples (Showing Image)

See this post if you want to convert the image in gray.
1. Create a new Qt GUI Application project.
2. Add a new Label and Push Button in the form.
3. Do the rest with writing the program:

main.cpp:
#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}


 mainwindow.h:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <opencv/cv.h>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv/highgui.h>
#include <QFileDialog>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);
    QString     FileOpName; //declare FileOpName as IplImage
    IplImage*   imagerd; //declare imagerd as IplImage

private slots:
    void on_pushButton_clicked();
    void openImage(); //add a new openImage function to the project

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H



mainwindow.cpp:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <opencv/cv.h>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv/highgui.h>
#include <QFileDialog>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);
    QString     FileOpName; //declare FileOpName as IplImage
    IplImage*   imagerd; //declare imagerd as IplImage

private slots:
    void on_pushButton_clicked();
    void openImage(); //add a new openImage function to the project

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H
---------------------------------------OR-------------------------------------------------
DOWNLOAD THE PROJECT (.zip)