学OpenCV

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简单的看下效果。

当前我使用的4.10.0。这个版本需要参数2，否则在我的windows10上加载不了摄像头。

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 1 #include <iostream>
 2 #include <opencv2/opencv.hpp>
 3 #include <opencv2/core/utils/logger.hpp>
 4 
 5 int main()
 6 {
 7     cv::utils::logging::setLogLevel(cv::utils::logging::LOG_LEVEL_ERROR);
 8 
 9     double fps = 1;
10 
11     cv::VideoCapture video(0,cv::CAP_DSHOW);
12     if (video.isOpened() == true)
13     {
14         std::cout << "width: " << video.get(cv::CAP_PROP_FRAME_WIDTH) << std::endl;
15         std::cout << "height:" << video.get(cv::CAP_PROP_FRAME_HEIGHT) << std::endl;
16         std::cout << "fps:" << video.get(cv::CAP_PROP_FPS) << std::endl;
17         std::cout << "frames:" << video.get(cv::CAP_PROP_FRAME_COUNT) << std::endl;
18 
19         fps = video.get(cv::CAP_PROP_FPS);
20     }
21     else
22     {
23         std::cout << "please check the file name and path." << std::endl;
24         return -1;
25     }
26 
27     cv::Mat frame;//放在外面可以吗？
28     for (;;)
29     {
30         video >> frame;
31         if (frame.empty())
32         {
33             break;
34         }
35 
36         cv::imshow("camera", frame);
37         cv::waitKey(1);
38     }
39 
40     cv::waitKey();
41 
42     return 0;
43 }