"In the picture above, u can see that there is 3 images that has 65536 in size."
Are you sure about that?
Ideally you can use a loop to achieve this, As you have named the images serially, but make sure that all the images are in the current directory.
for k=0:5
str = sprintf('chrome.%d.png', k)
I = imread(str);
out = sprintf('chrome%d.mat');
save(out, I)
end
