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how to create noise manually to a color image without imnoise function explain with example?

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ARUN SAI
ARUN SAI 2013-4-17
回答： muhammad khatib 2020-11-3
how to create noise manually to a color image without imnoise function explain with example?

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回答（2 个）

Iman Ansari
Iman Ansari 2013-4-17
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')
muhammad khatib
muhammad khatib 2020-11-3
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')

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