http://blog.csdn.net/loadstar_kun/article/details/39450137
http://blog.csdn.net/zddblog/article/details/7521424
http://aishack.in/tutorials/sift-scale-invariant-feature-transform-introduction/
http://blog.csdn.net/masibuaa/article/details/9191309
http://blog.csdn.net/xiaowei_cqu/article/details/8069548
puzzle http://blog.csdn.net/piaomiaoju/article/details/11693349
http://www.aiuxian.com/article/p-2225543.html
opencv专栏：http://blog.csdn.net/zhaocj/article/category/2521441 附带详细注释
http://people.rennes.inria.fr/Herve.Jegou/
https://sites.google.com/site/lsvrtutorialcvpr14/home/efficient-matching
http://www.xrce.xerox.com/Research-Development/Computer-Vision
CBIR：http://homes.cs.washington.edu/~shapiro/cbir.html
Color Names 颜色特征: http://lear.inrialpes.fr/people/vandeweijer/color_names.html