How to find uaci by fixing one image and changing the other?

The code for uaci for two images A and B.

uaci= sum( abs( double(A(:)) - double(B(:)) ) ) / num_of_pix / largest_allowed_val;

If A is a fixed image and there are differnt various B images say '50' then how to find uaci by fixing image A and varying B.

All the B images are in one folder.

Answer 1

[KSSV]

A = imread('whatever_is_A') ; 
B_images = dir('*.png') ;   % you are in the folder of images and give extension 
N = length(B_images) ; 
uaci = zeros(N,1) ; 
for i = 1:N
    B = imread(B_images(i).name) ; 
    uaci(i) = sum( abs( double(A(:)) - double(B(:)) ) ) / num_of_pix / largest_allowed_val;
end

[KSSV]

Are you in the same folder where the image is present? What is B_images class? What is value of N? Are you giving the extension of the image properly?

[Ammy]

Thank you very much, I was in the different folder.