中文说明：本算法是基于SIFT特征的人脸识别，程序结构清晰，有多个可视化界面，只要加入所需的人脸数据库就可以使用了。
English Description：
This algorithm is based on SIFT features face recognition, the program structure is clear, there are several visual interface, just add the required face database can be used.