opencv

https://blog.csdn.net/qq_42449351/article/details/99052241?utm_medium=distribute.pc_relevant.none-task-blog-2_defaultbaidujs_title~default-0.no_search_link&spm=1001.2101.3001.4242

https://www.cnblogs.com/yyagrt/p/7260586.html

https://blog.csdn.net/weixin_38605619/article/details/90648270

cmake编译opencv with contrib
https://blog.csdn.net/muguangzhichen/article/details/81278969
https://xercis.blog.csdn.net/article/details/86101094

//出现下述问题，把qt tools/minigw/bin下的该库复制到system32中去