permutation of a watermark image

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umar siyab 2011-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/22147-permutation-of-a-watermark-image

评论： Walter Roberson 2020-10-11

i have taken a watermark image and assign -1 value to black and 1 to white to whole watermark now i want permutation of this image. whats would b the efficient method for permuation process of this image.. if anyone have matlab code for this send me  and please help me...

regards siyab

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umar siyab 2011-11-24

the watermark image only contain black and white colour

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采纳的回答

Walter Roberson 2011-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/22147-permutation-of-a-watermark-image#answer_29173

在 MATLAB Online 中打开

reshape(Image(randperm(numel(Image))),size(Image))

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arwa allubani 2020-10-11

How to reshape the Image again to the Original Image?

Walter Roberson 2020-10-11

You cannot get back to the original image by reshaping the result of the above. The order of the pixels has been randomized. You would need to know (or be able to recreate) the random order that was used.

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