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

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Ammy 2021-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/1454259-how-to-find-uaci-by-fixing-one-image-and-changing-the-other

评论： Ammy 2021-9-16

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.

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Answer 1

KSSV 2021-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/1454259-how-to-find-uaci-by-fixing-one-image-and-changing-the-other#answer_788494

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

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KSSV 2021-9-16

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 2021-9-16