what should be the values of all the fidelity parameters that are calculated in denoising of an image?

i want know the possible values of PSNR MSE and correlation variable after applying addaptive filters to a noisy image

Answer 1

[harjeet singh]

use this code

clear all
close all
clc

image=imread('cameraman.tif');
figure(1)
imshow(image);
drawnow

image_n=imnoise(image,'salt & pepper',0.1);
figure(2)
imshow(image_n)
drawnow

I=double(image);
K=double(image_n);
[m n]=size(I);

MSE=(I-K).^2;
MSE=sum(MSE(:))/(m*n)

PSNR=10*log10(255.^2/MSE)
correlation = corr2(I,K)