http://www.cnblogs.com/tiandsp/archive/2013/05/24/3097503.html
1.《目标检测的图像特征提取之(一)HOG特征 》
http://blog.youkuaiyun.com/liulina603/article/details/8291093
http://www.cvchina.net/post/17.html
2.《OpenCV中的HOG+SVM物体分类 》
http://blog.youkuaiyun.com/liulina603/article/details/8289625
3.《TimeHandle's Blog:hog+svm_行人检测matlab程序》
http://www.zhizhihu.com/html/y2012/3729.html
4.《基于HOG的行人快速检测 》
http://wenku.baidu.com/view/0bed454cfe4733687e21aaf3.html
5.《Histograms of Oriented Gradients (HOG)理解和源码》
http://blog.sina.com.cn/s/blog_4a1853330100lgjm.html
6.《Histograms of Oriented Gradients (HOG)特征 MATLAB 计算》
http://blog.youkuaiyun.com/lcy9819/article/details/6616374
7.《HOG(Histograms of Oriented Gradients )梯度方向直方图》
http://www.cnblogs.com/slysky/archive/2012/04/25/2470057.html
8.PHOG descriptor,开源代码:
http://www.robots.ox.ac.uk/~vgg/research/caltech/phog.html