参考资料：
[1]Lazebnik S, Schmid C, Ponce J. Beyond bags of features: Spatial pyramid matching for recognizing natural scene categories[C]//Computer Vision and Pattern Recognition, 2006 IEEE Computer Society Conference on. IEEE, 2006, 2: 2169-2178.
[2]http://blog.csdn.net/love_yanhaina/article/details/8794694
【Papers】Spatial Pyramid Matching
原文：http://www.cnblogs.com/sunshineatnoon/p/3980341.html