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）