matlab-bmp2jpg

%% 将文件夹LFW_align_man5pt下的5K多个子文件夹下的.bmp图片转换为.jpg
close all;
clear;
clc;

maindir =  'F:\dataset\LFW_align_man5pt\';

subdir =  dir( maindir );   % 先确定子文件夹
disp('共有：'),disp(length(subdir));
total_num=1;
for i = 3 : length( subdir )
    if( isequal( subdir( i ).name, '.' ) || ...
            isequal( subdir( i ).name, '..' ))
        continue;
    end
    path1 = fullfile(maindir,subdir( i ).name,'\');
%     disp(subdir( i ).name)
%     接下来是新建子文件夹
    if ~exist(['F:\dataset\LFW_align_jpg\',subdir(i).name],'dir')
        mkdir(['F:\dataset\LFW_align_jpg\',subdir(i).name]);
    end
    path2= dir(path1);%获取该文件夹中所有bmp格式的图像
%     disp (path2)
    for j=1:length( path2 )
        if( isequal( path2( j ).name, '.' ) || ...
                isequal( path2( j ).name, '..' )|| ...
                isequal( path2( j ).name, 'Thumbs.db' ))
            continue;
        end
%         disp(path2(j).name)
        imgname = path2(j).name(1:(end-4))
%         disp(imgname)
        path=fullfile( maindir, subdir( i ).name,'\',path2(j).name);
        %             disp (path)
        img = imread( path );   % 这里进行你的读取操作
        filename = strcat(imgname,'.jpg');
        imwrite(img,['F:\dataset\LFW_align_jpg\',subdir(i).name,'\',filename]);
        
        
    end
end