http://dlib.net/
http://download.csdn.net/detail/lajuedan2508/9726225
http://download.csdn.net/detail/ycj9090900/9725948
http://download.csdn.net/detail/hust_bochu_xuchao/9723277
http://download.csdn.net/user/hust_bochu_xuchao
Dlib is a modern C++ toolkit（非常全面的类库）
原文：http://www.cnblogs.com/findumars/p/6250837.html