read .png from different subfolder

I have a folder with a lot of subfolders. I want to read all .png in one subfolder and save and then go to the second subfolder and read all the .png and save and then go to the third subfolder etc. anyone can help me with it?

Answer 1

[Image Analyst]

See my attached demo to recurse into subfolders.

Answer 2

[Azzi Abdelmalek]

folder='E:\matlab'
d=dir(folder)
subf=d([d.isdir])
im=[]
for k=3:numel(subf)
  subfolder=subf(k).name
  subf1=fullfile(folder,subfolder)
  f=dir([subf1 '\*.png'])
  for ii=1:numel(f)
      file=fullfile(subf1,f(ii).name);
      im{end+1}=imread(file);
  end
end
im