HOW TO ADD MSE TO EXISTING TOOL (CODE)?

I have discovered the PVD Steganography tool from Github. the code only provide psnr calculation but i want to add mse and only get error. How i do so and code is connected to GUI. Thank you.

-CODE LINK FOR PSNR-

https://github.com/esakki712/Secured-Data-Transmission-With-Steganography--Text-hidden-in-Image--With-GUI-MATLAB./blob/d2d63783c432c727e267dd24fa69cd0722dd0779/psnr_cal.m

-CODE FOR PVD TOOL-

https://github.com/esakki712/Secured-Data-Transmission-With-Steganography--Text-hidden-in-Image--With-GUI-MATLAB..git

Answer 1

[DGM]

Use immse()

A = imread('peppers.png'); % some reference image
B = imnoise(A,'gaussian',0.001); % a modified copy

immse(A,B) % the MSE

ans = 584.7149

[rena m]

usually mse value should be 0 to 1. so the 584.7149 is equal to 0.5847 ?

[DGM]

The MSE is the mean of the square of a difference. If both images have a nominal range of [0 k], then the MSE will have a nominal range of [0 k^2].

If you expect that the nominal range of MSE is [0 1], then that implies that you expect your images to both have the same nominal range of [0 1].

A = imread('peppers.png'); % some reference image
B = imnoise(A,'gaussian',0.001); % a modified copy

% these images are both in the range [0 255]
err1 = immse(A,B) % the MSE

err1 = 583.8506

% if the images were both in the range of [0 1]
% this is what you'd get:
err2 = immse(im2double(A),im2double(B))

err2 = 0.0090

% which is the same as
err1/(255^2)

ans = 0.0090

[rena m]

thank you so much