数据集：

1. INRIA Person DataBase
   http://pascal.inrialpes.fr/data/human/
   ftp://ftp.inrialpes.fr/pub/lear/douze/data/INRIAPerson.tar

2. Caltech Pedestrian Detection Benchmark
   http://www.vision.caltech.edu/Image_Datasets/CaltechPedestrians/

https://zhuanlan.zhihu.com/p/31836357