sift, good code! Please read your package and describe it at least 40 bytes in English.

代码是用MATLAB编写的sift小程序，效果较好。-Code is written in MATLAB sift small program better.

可以提取一幅图中想要的目标，这是第二能量熵的matlab代码，结合PCA的尺度不变特征变换(SIFT)算法。- Target can be extracted in a picture you want, This is the second energy entropy matlab code, Combined with PCA scale invariant feature transform (SIFT) algorithm.