图片转为mat格式保存-matlab

namelist = dir('D:\PythonProject\*.png'); #文件路径
file_name = {
    
    namelist.name};
l = length(file_name); 
dirs = 'D:\PythonProject\';#用于重命名文件 批量保存
for i=1:l
     I = imread([dirs,file_name{
    
    i}]);
     savePath = [file_name{
    
    i},'.mat'];
     save(savePath,'I')
end