how to create noise manually to a color image without imnoise function explain with example?
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Hi. For gaussian noise with standard deviation of S:
clear S = 20; I = imread('peppers.png'); J = double(I) + S.*randn(size(I)); figure; subplot(121) imshow(I) title('Original Image') subplot(122) imshow(J./255) title('Additive Gaussian Noise')