这个matlab程序基于the repeatability criterion对几种区域检测子进行了比较，有问题可以查看下面这个网页 http://www.robots.ox.ac.uk/~vgg/research/affine/evaluation.html#eval_soft-Comparison of Affine Region Detectors

fast特征，fast算法的matlab实现，三个版本其中的一个，包含改进的FAST-ER。-Self contained code, complete with example.License is the BSD license. Contains exact detectors and FAST-ER detector.

自适应中值滤波-Chan R H, Ho C W, Nikolova M. Salt-and-pepper noise removal by median-type noise detectors and detail-preserving regularization[J]. IEEE Trans. Image Process, 2005, 14(10): 1479～1485. 该文献中自适应中值滤波算法代码-matlab code of adpative median filter