reconstructing the original image from shuffled image

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Algorithms Analyst
编辑： Matt J 2014-5-7
Hi all
I performed shuffling on image pixels like
shuffled_image=reshape(img(randperm(numel(img))),size(img));
In this way, I got the image whose pixels location are shuffled randomly.How can I get or reconstruct the original image (img) from the shuffled image.Every help is appreciated

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Matt J
Matt J 2014-5-7
编辑：Matt J 2014-5-7
I'm assuming you saved the permutation indices, idx, as below
idx=randperm(numel(img));
shuffled_image=reshape(img(idx),size(img))
Then you can do,
iidx(idx)=1:numel(img);
recovered_image=reshape(shuffled_image(iidx),size(img))

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