用matlab实现的pca-sift代码，基于2004年的一篇CVPR论文实现-Pca-sift achieved using matlab code, based on a CVPR papers in 2004 to achieve

使用传统的PCA主成分法，进行人脸的识别与匹配，源程序为matlab版，本程序改写，已经将内置函数进行了替换-Use the traditional method of PCA components, face recognition and matching, source code for matlab version, the program rewritten, and has built-in functions to replace