How to Find MSE and PSNR ?

Please help me, an error occurred when I was calculating the score of MSE and PSNR

“Error using -

Integers can only be combined with integers of the same class, or scalar doubles.”

I use an MSE and PSNR function like the following:

function [nilaiMSE, nilaiPSNR] = MSE_PSNR(citra_Prepro,citra_Process);

%MSE

[m, n] = size(citra_Process);

nilaiMSE = sum(sum(citra_Prepro - (citra_Process .^2))/(m*n));

%PSNR

nilaiPSNR = 10*log10(255*255/(nilaiMSE));

end

And I used to look for the following value:

citra_Prepro= getimage(handles.axes_Preview);

citra_Process= getimage(handles.axes_IHPF);

[nilaiMSE, nilaiPSNR]= MSE_PSNR(citra_Prepro,citra_Process);

set(handles.MSE_IHPF,'String', nilaiMSE);

set(handles.PSNR_IHPF,'String', nilaiPSNR);

where my "citra_Prepro" variables gets from histogram equalization and my "citra_Process" variables gets from Ideal High Pass Filter.

Answer 1

[Yash]

Hi Akbar,

The error message you are getting suggests that there is a type mismatch between the citra_Prepro and citra_Process variables. Specifically, it seems that one of the variables is an integer and the other is a double. To fix this, you can convert both variables to the same data type using the double function. Here's an updated version of the MSE_PSNR function:

function [nilaiMSE, nilaiPSNR] = MSE_PSNR(citra_Prepro,citra_Process)

%MSE
c_Prepro = double(citra_Prepro);
citra_Process = double(citra_Process);
[m, n] = size(citra_Process);
nilaiMSE = sum(sum((citra_Prepro - citra_Process).^2))/(m*n);

%PSNR
nilaiPSNR = 10*log10(255*255/(nilaiMSE));
end

This version of the function converts both input variables to doubles using the double function, which should resolve the type mismatch error.