训练官方提供的数据集:
http://blog.csdn.net/LiJiancheng0614/article/details/77756252
训练自己的数据集(墙外):
https://medium.com/towards-data-science/how-to-train-your-own-object-detector-with-tensorflows-object-detector-api-bec72ecfe1d9
图片标记工具
https://github.com/tzutalin/labelImg