Simple opencv application

main.cpp

#include <QCoreApplication>
#include <cv.h>
#include<cxcore.h>
#include <highgui.h>
#include<iostream>

using namespace std;
using namespace cv;

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    Mat image;
    image = imread("<path to image file>");   // Read the file

       if(image.empty())                              // Check for invalid input
       {
           cout <<  "Could not open or find the image" << std::endl ;
           return -1;
       }

       namedWindow( "Display window", CV_WINDOW_AUTOSIZE );//Create a window for display.

       imshow( "Display window", image );   // Show our image inside it.
       waitKey(0);
    return a.exec();
}