1. TensorFlow Object Detection
https://www.zhihu.com/question/61173908
https://opensource.googleblog.com/2017/06/supercharge-your-computer-vision-models.html
https://www.youtube.com/watch?v=PgnsapPGaaw
https://github.com/CharlesShang/FastMaskRCNN
https://github.com/tensorflow/models/tree/master/object_detection
http://blog.csdn.net/linolzhang/article/details/70306003
2. traffic light detection
https://github.com/davidbrai/deep-learning-traffic-lights
https://github.com/DeepScale/SqueezeNet
https://medium.freecodecamp.org/recognizing-traffic-lights-with-deep-learning-23dae23287cc http://www.sohu.com/a/128094821_185201
