int _tmain(int argc, _TCHAR* argv[])

{

    Mat frame;

    VideoCapture cap();

    namedWindow("frame", CV_WINDOW_NORMAL);
    setWindowProperty("frame", CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);　　//设置窗口全屏
    cap.set(CAP_PROP_FRAME_WIDTH, 1920.0);　　//设置摄像头采集图像分辨率
    cap.set(CAP_PROP_FRAME_HEIGHT, 1440.0);

    while (true)

    {

        cap >> frame;

        if (frame.empty())

        {

            return ;

        }

        imshow("frame", frame);

        if (waitKey() == )

        {

            break;

        }

    }

    return ;

}