【OpenCV】OpenCV 读取摄像头数据

发表于2021-03-10更新于2021-08-24字数统计97阅读时长1分阅读次数

通过cv::VideoCapture类读取外接设备视频流（摄像头或外接读卡器获取到的视频流）

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cv::VideoCapture capture(0);

if (!capture.isOpened())
{
    printf("could not open camera...\n");
    return -1;
}
cv::namedWindow("capture", WINDOW_AUTOSIZE);

cv::Mat frame;
int index = 0;

while (true) 
{
    if (!capture.read(frame)) 
        break;
    
    cv::imshow("capture", frame);
    char c = waitKey(1);
    
    if (c >= 49) {
    index = c - 49;
    }
    if (c == 27) {
    break;
    }
}

capture.release();