tensorflow object detection
Follow guidelin from https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md
and https://zhuanlan.zhihu.com/p/31365997
Follow guidelin from https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md
and https://zhuanlan.zhihu.com/p/31365997