https://cloud.tencent.com/developer/article/1419619
https://github.com/opencv/opencv_contrib
https://docs.opencv.org/4.3.0/d4/d61/group__text.html
https://blog.csdn.net/xuxunjie147/article/details/87178774
EAST 文本检测
https://blog.csdn.net/jkjj2015/article/details/87621668
https://blog.csdn.net/monk1992/article/details/90719151
原文：https://www.cnblogs.com/liutianrui1/p/13224245.html