http://www.bfcat.com/index.php/2012/06/sift-surf/
http://www.cppblog.com/lovedday/archive/2007/05/14/24075.html
http://140.130.15.147/半導體及光電學程網頁/下載/課程教材/自動化光學檢測/ch05_影像濾波.pdf 各种滤波
http://bingloveu.blog.163.com/blog/static/184441194201132474932654/ surf
原文：http://www.cnblogs.com/pengkunfan/p/4109075.html