How can I add any kind of noise to image for a given SNR?

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Muhammad Ali

I suggest you may ENJOY https://au.mathworks.com/help/comm/ref/awgn.html

https://au.mathworks.com/help/images/ref/imnoise.html

https://au.mathworks.com/matlabcentral/answers/126329-problem-to-add-gaussian-noise-to-image

Ranjan Parekh

If A is the image, then for a given nsr, noise variance n_var is given by :

nsr = n_var / var(A(:));

Then noises which are specified by variance values can be added :

J = imnoise(A, 'gaussian', n_mean, n_var)

J = imnoise(A, 'speckle', n_var)