how can i calculate rmse ?

Hi, I want to calculate rmse without using for loops between 2 images. this should produce a number not a matrix. can you help me?

[Muhammad Usman Saleem]

upload your images

Answer 1

[Image Analyst]

Use the immse() function in the Image Processing Toolbox.

Answer 2

[Muhammad Usman Saleem]

if you upload your images, batter for me to make a code then. Try this prototype

in order to calculate some RMS error for your images, you require two points

(1) YourOrginalimaege

(2) Extimatedimage

YourOrginalimage=imread('imageA.tif');
Extimatedimage=imread('imageB.tif');

Then you can calculate RMS error as

RMS=sqrt(sum(YourOrginalimage (:)-Extimatedimage (:))^2/N) % thanks to John

where N may be total no of samples in YourOrginalimage

Check it and tell me?

[John D'Errico]

Um, NO!

You need to square those differences before the sum. In your formula, there is no square operation at all.

As importantly, if the image arrays are stored as uint8, the computation you propose will fail completely. Those image values must first be assured to be doubles before any such computation.

[Muhammad Usman Saleem]

has corrected now