MATLAB: How to process each non-overlapped block of an image after it’s sub-division

block processingImage Processing Toolboximage sub-divisionnon-overlapping blcoks

My function sub-divides an image into non-overlapping blocks (each block is a cell matrix). I wonder how to process each block and then recombine them to make a processed image? Let's say I want to apply fast Walsh Hadamard transform (fwht2) on each block. Here is my function:
if true
  function Blocks = imageBlock(I)
[m,n] = size(I);
Blocks = cell(m/8,n/8);
counti = 0;
for i = 1:8:m-7
 counti = counti + 1;
 countj = 0;
 for j = 1:8:n-7
      countj = countj + 1;
      Blocks{counti,countj} = I(i:i+7,j:j+7);
 end
end
end

Best Answer

cellfun() to process them. cell2mat() to recombine.
Have you considered using blockproc() instead of the steps you are taking now?
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