最近处理无标签图像，但是，有的图像下载下来后，有的是坏的，matlab imread 函数无法读取，而且会报错，然后自动终止程序的执行；
怎么破？
用 try catch 机制来解决这个问题：
path = "/home/wangxiao/imagefiles/" ;
files = dir(path, '*.png') ;
for i = 1:size(files, 1)
disp(['==>> deal with: ', num2str(i), '/', num2str(size(files, 1)), ' waiting ... ']) ;
try
image = imread([path, files(i).name]) ; % if read the image failed, then jumped into part: "catch"
catch
i = i + 1; % jumped the current bad images, try to read the next image in the next iteration.
end
// your operation.
end
