中文说明：对图形提取SIFT特征，文件含有使用说明，编译后即可运行。源码中有两个版本，Matlab以及C语言版本，效果还可以。
English Description：
Extract SIFT features graphics, files containing instructions, compiled for them to work. Comes in two versions in the source code, Matlab and c programming language version, the effect can be.