How Can I Vectorize 4 nested loop to do a task between an image and a mask of it

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eng had 2020-5-19

关闭： MATLAB Answer Bot 2021-8-20

for i=B:n-B 
    for j=B:m-B
        SubFeaArr=[];
        imm(i-B+1:i+B-1,j-B+1:j+B-1) = im(i-B+1:i+B-1,j-B+1:j+B-1)+1;
    end
end

darova 2020-5-20

Yes, see my previous post

eng had 2020-5-20

I dont see any sliding window in your code line? you apply the process in the whole image at the same time

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