主要用于性别识别，可以将不同目录下的不同文件夹下的多张图片读取出来，并按顺序排列，存储为.mat文件，并为每个图片打上标签，方便后面的训练。-Mainly used for gender identification, multiple images can be different files in different directories under the folder read out, according to the order, stored as .mat file and m