is it possible to create noise in a color image without using imnoise function?
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What type of noise? http://en.wikipedia.org/wiki/Image_noise
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Yes, you could use rand(), or just write any nonsense into the image that is not the image, such as
if yourImage(row, column) ~= 42
yourImage(row, column) = 42; % I just created noise!
Opportunities for recent engineering grads.