matlab 读取子文件夹下的所有图片

matlab 读取子文件夹下的所有图片 并拷贝到另外一个文件夹下面。

cifar10数据按照不同的分类存储在10个文件夹下面，要复制到同一个文件夹train_image下

filetrain = genpath('D:\CaffeInfo\B_DataCreate\cifar-10\train');

length_filetrain = size(filetrain,2);%字符串p的长度
path = {};%建立一个单元数组，数组的每个单元中包含一个目录
temp = [];
for i = 1:length_filetrain %寻找分割符';'，一旦找到，则将路径temp写入path数组中
    if filetrain(i) ~= ';'
        temp = [temp filetrain(i)];
    else 
        temp = [temp '\']; %在路径的最后加入 '\'
        path = [path ; temp];
        temp = [];
    end
end  


for i = 2 : length(path)
    sub_path = mat2str( cell2mat( path(i) ) );
    sub_path = sub_path(2:end-1);
    im_train = dir(sub_path);
    for j = 3:length(im_train)
        [i  j]
        I = imread([sub_path, im_train(j).name]);
        imwrite(I,['D:\CaffeInfo\B_DataCreate\train_image\', 'train', '_class-', num2str(i-2), '_num-', num2str(j-3), '.tif'])
    end
   
end

%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
fileval = genpath('D:\CaffeInfo\B_DataCreate\cifar-10\val');

length_fileval = size(fileval,2);%字符串p的长度
path = {};%建立一个单元数组，数组的每个单元中包含一个目录
temp = [];
for i = 1:length_fileval %寻找分割符';'，一旦找到，则将路径temp写入path数组中
    if fileval(i) ~= ';'
        temp = [temp fileval(i)];
    else 
        temp = [temp '\']; %在路径的最后加入 '\'
        path = [path ; temp];
        temp = [];
    end
end  


for i = 2 : length(path)
    sub_path = mat2str( cell2mat( path(i) ) );
    sub_path = sub_path(2:end-1);
    im_val = dir(sub_path);
    for j = 3:length(im_val)
        [i  j]
        I = imread([sub_path, im_val(j).name]);
        imwrite(I,['D:\CaffeInfo\B_DataCreate\val_image\', 'val', '_class-', num2str(i-2), '_num-', num2str(j-3), '.tif'])
    end
   
end