中文说明：这个包里面包括了SIFT特征点检测及匹配的Matlab代码，不是那种编译好的exe文件，对于该算法的理解有一定的帮助，另外包含一些测试的图片，有小图和大图，测试大图的时候速度可能有些慢，还有待进一步的优化。不过对于算法学习绰绰有余了。
English Description：
This package includes the SIFT feature point detection and matching of Matlab code, not a compiled exe files for help understanding of the algorithm, also contains some test images, thumbnails and big picture, test speed may be slow when large image, needs to be further optimized. But the algorithm is more than enough.