How to scramble an image?
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Sneha P S
on 26 Apr 2018
Commented: Walter Roberson
on 13 May 2018
I need to scramble an image and want to get back the orginal image. So i used the below code
im = imread('cameraman.tif');
vec = randperm(numel(im));
vec = reshape(vec, size(im));
out = im(vec);
%To reconstruct the original image
reconstruct = zeros(size(im), class(im));
reconstruct(vec) = out;
But here each time the scrambling is done randomly. Is there any method to scramble the same pixels all the time. That is how to choose the pixels to change. Please help me with this as it is an urgent need.
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Accepted Answer
Ameer Hamza
on 26 Apr 2018
Add this add beginning of your code
rng(10); % you can use any number.
this will seed random number generator with same value every time.
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