How to randomly select n number of pixels from an image whose value is one and change those pixels value to zero?

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Anushka 2015-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/220418-how-to-randomly-select-n-number-of-pixels-from-an-image-whose-value-is-one-and-change-those-pixels

评论： Anushka 2015-5-28

采纳的回答： Thorsten

How to randomly select n number of pixels from an image whose value is one and change those pixels value to zero?

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Thorsten 2015-5-28

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 ind = find(I == 1);
 r = randperm(numel(ind));
 r = r(1:n);
 I(ind) = 0;

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Anushka 2015-5-28

thank you sir it worked.

Anushka 2015-5-28

Sir what does the line r = r(1:n); does.

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