【OpenCV】读取摄像头的区别，opencv2与opencv3移植问题

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/hongtao_6/article/details/82186629

先来看一下我们比较熟悉的Opencv3中读取摄像头的方法：

int main()
{
    VideoCapture capture(0);
    Mat frame;
    while (capture.isOpened())
    {
        capture >> frame;
        imshow("capture", frame);
        if (cvWaitKey(30) == 27)
            break; 
    }
    return 0;
}

接下来是Opencv2 中读取摄像头的方法：

int main()
{
    IplImage* pFrame = NULL;
    CvCapture* pCapture = cvCreateCameraCapture(0);
    int delay = 1000 / 30;
    while (true)
    {
        pFrame = cvQueryFrame(pCapture);
        Mat frame = cvarrToMat(pFrame);
        if (!pFrame)break;
        cvShowImage("video", pFrame);
        int key;
        key = waitKey(delay);
        return 0;
    }
}