matlab中，我想把一个文件夹里的所有图片都读入，如何做

这是读取两层文件夹里图片的示例。

clc;
clear;
fatherPath=['C:\Users\chen\Desktop\人脸识别\faces'];
dirs=dir(fatherPath);
dircell=struct2cell(dirs);
for i=3:length(dircell)
    subdirs=dircell(1,i);
    SonPath=[fatherPath '\' cell2mat(subdirs)];
    %SonPath=[fatherPath '\' cell2mat(subdirs) '\*.pgm'];
    dirs2=dir(SonPath);
    dircell2=struct2cell(dirs2);
    for j=3:length(dirs2)
        PictureName=dircell2(1,j);
        PicturePath=[SonPath '\' cell2mat(PictureName)];
        tempimg=imread(PicturePath);
       % imgname=[SonPath '\' cell2mat(PictureName) '.png'];
       imgname=['C:\Users\chen\Desktop\人脸识别\png\' cell2mat(PictureName) '.png'];
        imwrite(tempimg,imgname);
    end
end

jpg格式图片是m*n*3的，你用image(:,:,u)=imread()去读取、存储图片内容，是不行的，要这样：image{u}=imread(),就是用元胞数组存储。