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 marked label for each picture, to facilitate subsequent training.