Imnoise function usage in Matlab

Artificially add a mean of 0 to a gray image with a variance of 0.02 Gaussian noise. Remove the added noise by adding an average of 100 times, compare and display the source image, add noise, and remove noise.

X=rgb2gray(imread('peppers.png '); subplot (0.02, 1); imshow (x); title ('original'); j = imnoise (x, 'gaussian', 0 ); subplot (1, 3, 2); imshow (j); title ('noisy back'); H1 = zeros (size (x )); for I = j = imnoise (x, 'gaussian ', 0, 0.02); H1 = H1 + double (j); endH = H1/100; subplot (1, 3, 3); imshow (uint8 (H); title ('post-Denoising ');