i wann to calculate MSE & PSNR.

i am doing edge detection. i have taken 1 gray scale image. and by applying diff edge detection methods on them i find the results. i have calculated mean and SD of resultant image.

now i want to calculate MSE & PSNR. of them

pls guide me

Answer 1

[Sajid Khan]

Hi Gautam,

It's the link for calculating root mean square error from which you can calculate mean square error as the difference is just a root involved in one

http://www.mathworks.com/matlabcentral/fileexchange/33595-code-for-calculating-root-mean-squared-error-for-data

And here is the link to calculate PSNR

http://www.mathworks.com/matlabcentral/fileexchange/40612-peak-signal-to-noise-ratio

Answer 2

[Sajid Khan]

Or try this if you want to calculate mse for a 2D array,

err_val = mean(mean((orig_matrix - est_matrix).^2));

But if you have 1d Array, you can use mean function only once, by the way if you call mean multiple times without having it's requirement, the result will be same, it will just waste your debugging time only.