How to permute rows with specific number of permutation

Question

sadiqa ilyas 2020-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/512103-how-to-permute-rows-with-specific-number-of-permutation

评论： sadiqa ilyas 2020-3-21

Hi I want to permute the image first column wise then row wise with specific values. The code I have written gives correct answer with column permutation but gives an error for row permutation .

I1=imread('lina512.bmp');
I2=imresize(I1,[8 8]);figure;imshow(I2)
I=I2(:,:,1);figure;imshow(I)
 csm = @(I,Col) circshift(I(:,Col),[3 1-Col]);    % Arbitrary Matrix
 callcsm = @(I) csm(I, 1:size(I,2));
 HH1 = callcsm(I);
%row shift
csm = @(row,I) circshift(I(row,:),[1-row,3]);    % Arbitrary Matrix
callcsm = @(I) csm(I, 1:size(I,2));
HH = callcsm(I);
error in row shift
index exceed matrix dimension

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Answer 1

Sriram Tadavarty 2020-3-21

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Hi Sadiq,

In the row shift, the function handle csm takes in first input as row and next input as image I, but while accessing it in the function handle callcsm, you are sending first image I and then column indexes. Make the update here as stated and it will solve the issue.

csm = @(row,I) circshift(I(row,:),[1-row,3]);    % Arbitrary Matrix
callcsm = @(I) csm(1:size(I,1),I); % Make the call to csm with proper signature as defined in csm

Hope this helps.

Regards,

Sriram