python 3.8.0
pip3 install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple pip3 install pillow
tensorflow搭建cnn人脸识别训练+识别代码（python） https://blog.csdn.net/codes_first/article/details/79223524
TensorFlow保存训练模型为pb文件，读取pb恢复模型 https://blog.csdn.net/qq_38409301/article/details/95516489
tensorflow如何保存pb文件和读取pb文件 https://www.jianshu.com/p/e5e36ffde809