OpenCV

https://www.bzblog.online/wordpress/index.php/2020/03/09/opencvdownload/

https://blog.csdn.net/yeler082/article/details/78129395?spm=1001.2014.3001.5501

https://blog.csdn.net/yeler082?t=1

http://c.biancheng.net/view/1104.html

https://www.cnblogs.com/jliangqiu2016/p/5597501.html

http://c.biancheng.net/view/1791.html