SIFT特征具有缩放、旋转特征不变性，下载了大牛的matlab版SIFT特征提取代码，解释如下：appendimages-Matlab version on SIFT SIFT features with zoom, rotation invariant features, download large cattle extraction code, interpreted as follows: appendimages

《现代数字图像处理技术提高及应用案例详解(MATLAB版)》书中配套代码-" Modern digital image processing technology to improve and Applications Detailed (MATLAB Version)," the book Companion Programs