Test OpenCV

#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <stdio.h>
#include <iostream>

using namespace cv;
using namespace std;

int main(void){
	VideoCapture cap(0);
	if (!cap.isOpened())
	{
		cout << "Cannot capture your webcam" << endl;
		return -1;
	}
	namedWindow("Webcam", CV_WINDOW_AUTOSIZE);
	while (1)
	{
		Mat frame;
		bool bSuccess = cap.read(frame);
		if (!bSuccess){
			cout << "Cannot read the frame from your cam" << endl;
			break;
		}
		imshow("Webcam", frame);
		if (waitKey(30) == 27) //wait for 'esc' key press for 30 ms. If 'esc' key is pressed, break loop
		{
			cout << "esc key is pressed by user" << endl;
			break;
		}
	}
	return 0;
}