how can i calculate MSE and PSNR of RGB color image?

Harrison - 2020-10-15T11:43:39+00:00

Question: how can i calculate MSE and PSNR of RGB color image?

i embeded a watermark in RGB color image now i want to calculate PSNR and MSE of original and watermarked images . how can i find PSNR and MSE of original and watermarked images

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Expert Answer

John Michell answered . 2025-11-20

clc;

[filename1,pathname]=uigetfile('*.*','Select the original image'); 

image1=imread(num2str(filename1));

[filename2,pathname]=uigetfile('*.*','Select the watermarked image'); 

image2=imread(num2str(filename2));

figure(1);

imshow(image1); title('Original image'); 

figure(2);

imshow(image2); title('Watermarked image');    

[row,col] = size(image1)

size_host = row*col;

o_double = double(image1);

w_double = double(image2);

s=0;

for j = 1:size_host; % the size of the original image

s = s+(w_double(j) - o_double(j))^2 ; 
end

mes=s/size_host;

psnr =10*log10((255)^2/mes);

display 'Value of',psnr

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