How to calculate noise in image
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Lokesh on 7 Jul 2022
Edited: Lokesh on 7 Jul 2022
It is my understanding that you would want to calculate noise in a gray image.
The function estimate_noise inputs a grayscale image I and returns Sigma, the noise estimate. Here is a sample use:
I = rgb2gray(imread('sample.jpg')); ( can be skipped when input image is gray)
Refer to this link for more details: