https://www.jeremyjordan.me/semantic-segmentation/
https://medium.com/vooban-ai/satellite-image-segmentation-a-workflow-with-u-net-7ff992b2a56e
http://blog.qure.ai/notes/semantic-segmentation-deep-learning-review
https://zhuanlan.zhihu.com/p/39443160
https://www.zhihu.com/question/297859987/answer/508712033
https://news.pedaily.cn/201801/426782.shtml
https://scikit-learn.org/stable/modules/generated/sklearn.ensemble.RandomForestClassifier.html