说明：  人脸图像识别中所应用MATLAB 对图像进行预处理，应用该工具箱对图像进行经典图像处理,通过实例来应用matlab图像处理功能， 对某一特定的人脸图像处理， 进而应用到人脸识别系统。
(In face recognition, MATLAB is applied to preprocess the image. The toolbox is applied to the classic image processing of the image. The MATLAB image processing function is applied to a specific face image processing, and then applied to face recognition system.)