从实时视频流中使用OpenCV进行形状检测

时间:2016-01-27 16:05:11

标签: opencv image-processing video-processing

在此post中,考虑了OpenCV中的形状检测主题(来自图像)。为了扩展主题,如何通过实时视频流实时检测OpenCV的形状?

1 个答案:

答案 0 :(得分:1)

是的,可以从视频流中使用OpenCV检测形状 - 正如Miki所提到的,VideoCapture并将每个帧作为单个图像抓取将是这样做的方法。 C ++中的代码类似于:

//inside your method, make sure to bring in the libraries needed
VideoCapture capture(0); //opens the first webcam on your computer
Mat frame;

while (true) { 
    capture >> frame; //pulls the next frame in
    if (frame.empty()) { //makes sure it's not empty
    printf("No frame!");
    break;}
    //do whatever you want with that frame here
    imshow("framename", frame); //displays the frame to the user
    waitKey(1); //longer gives you a longer delay between frames
}

实时操作会有点困难 - 取决于相机的帧速率和计算机处理程序的强大程度,您可以将更新速率降低到几分之一秒。如果它仍然不够快,通过opencv cudaopencv gpu库可能会让您获得更快的速度。