how to save decomposed sub images/blocks of images into new folder ?

For example, i have 5 images of size 512*512 and divided these images into 128*128 blocks/subimages. Here i want to store theses sub-images i.e. 16*5=80 into new folder where each image has 16 sub-images. How i can do it with imwrite commond.

Can you please anyone help me to do it. Thank you in advance

Answer 1

[KSSV]

% saving the images first 
 N = 5 ;
  for i = 1:N
      I = rand(512,512) ;
      I1 = reshape(I,128,128,[]) ;
      for j = 1:size(I1,3)
          filename = strcat(num2str(N),'_',num2str(j),'.png') ;
          imwrite(I1(:,:,j),filename) ;
      end
  end

% To read the images in the folder 
  F = dir('*.png');   % your extension of images
  for ii = 1:length(F)
     I = imread(F(ii).name) ;
  end

Combine the above codes. I have saved images using random data as of now. you can call the images using the second code.

[Naushad Varish]

sir only 16 subimages have been stored instead of 80 subimages, i think images are overwrite from previous one.

[KSSV]

yes...change this line:

filename = strcat(num2str(N),'_',num2str(j),'.png') ;

to

filename = strcat(num2str(i),'_',num2str(j),'.png') ;