MATLAB: How to divide an image with unequal size into 4 x 4 non-overlapping blocks.

non overlappingunequal size

an image with unequal size shoud be divided into 4 x 4 non-overlapping blocks.

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This code will convert the 3 channel inImage into 16 patches and save them in a cell array

mat2cell(inImage, size(inImage,1)/4*ones(4,1), size(inImage,2)/4*ones(4,1), 3)

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MATLAB: Finding overlapping and non-overlapping values in matrix

Try the following code:

A=[3 16 4 16;3 21 4 21;3 29 3 29;17 27 18 29;25 72 26 72;61 70 61 70;62 63 62 63];
Un=0;
for i=1:size(A,1)
   idx{i}=setdiff(find(any(ismember(A,A(i,:)),2)),i);
   if i>1
       Un=union((idx{i}),Un);
   end
end
Un=setdiff(Un,0);
overlapping_rows=A(Un,:)
non_overlapping_rows=A(setdiff(1:size(A,1),Un),:)

MATLAB: How to divide an image into non-overlapping blocks size 4×4

Anisa: Regarding your latest edit. If you want to do it that way, then you don't need the innermost two loops. Simply do it like this:

I=imread('lena.bmp');
c = mat2cell(I, [32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32], ...
  [32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32]);
minOfBlocks=zeros(16,16);
subplot(1,2,1);
imshow(I);
title('Original Image', 'FontSize', 30);
for i=1:16
  for j=1:16
    a = c{i,j};
    minOfBlocks(i,j)=min(a(:));
  end
end
subplot(1,2, 2);
imshow(minOfBlocks, []);
title('Min of 32x32 Blocks', 'FontSize', 30);

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Related Solutions

MATLAB: Finding overlapping and non-overlapping values in matrix

MATLAB: How to divide an image into non-overlapping blocks size 4×4

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