https://blog.csdn.net/LoHiauFung/article/details/78454905
https://www.linuxidc.com/Linux/2017-11/148331.htm
https://blog.csdn.net/liuxiaoheng1992/article/details/54407589
https://www.zhihu.com/question/34524316/answer/182278536
Dlib:http://dlib.net/ https://pypi.org/project/dlib/19.6.0/
https://blog.csdn.net/Stephen_yu/article/details/79563152?utm_source=blogxgwz3