How to make nested loop from 8x8 block for image size 512x512?

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DhaniAri 2018-3-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/390020-how-to-make-nested-loop-from-8x8-block-for-image-size-512x512

评论： KSSV 2018-3-23

采纳的回答： KSSV

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i have an image with size 512x512, then i make a 8x8 block so there is 4096 block, i want to calculate variance function in each block, how to make a for loop kx so one block kx will calculate and move again in second block then calculate again so it will calculate all 4096 block, i'm stuck just only one row inside of first block, can someone help me? thank u

 i []; j[];
 for k=1:4096
    kx=(x{k});% extracting block into kx for processing
         for i = 1:8
              for j = 1:8
                 Variance = var(kx);
              end
         end
 end

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Adam 2018-3-22

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I would have thought one of

doc blockproc
doc nlfilter

would be able to do this if you have the image processing toolbox

DhaniAri 2018-3-23

thank u for your help, i will try

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KSSV 2018-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/390020-how-to-make-nested-loop-from-8x8-block-for-image-size-512x512#answer_311491

This will help you:

https://in.mathworks.com/matlabcentral/answers/362262-i-have-a-32-32-matrix-i-want-to-take-mean-of-each-4-4-so-that-the-matrix-is-reduced-to-8-8-array

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DhaniAri 2018-3-23

thanks KSSV for your help

KSSV 2018-3-23

Thanks is accepting the answer.....!

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