SIFT（Scale-invariant feature transform）是一种检测局部特征的算法，该算法通过求一幅图中的特征点（interest points,or corner points）及其有关scale 和 orientation 的描述子得到特征并进行图像特征点匹配，获得了良好效果-SIFT (Scale-invariant feature transform) is a local feature detection algorithm by finding a picture of the feature points (interest points, or corner points) and its associated scale and orientation descr iptors and image characteristics obtained feature point matching, get good results