find the largest mutual information between images

hello everyone. I have a single image called 'A' and a voulme with slices called 'B1,...B100'.

I want to find the best match slice from any image of 'B' with A by finding the largest mutual information of each A&B1,A&B2,...,A&B100.

for example the mutual information between A and B50 is the most largest, so the most similar slice of volume B with image A, is B50.

Could you help me please?

Thanks

[PabiG]

Hi,

do the A and B-images have the same 2D-size?

If so, I would suggest to do something like that:

Differences = zeros(size(B,3)); %or cell(size(B,3)) if you want to analyze the local errors
for i = 1:size(B,3)
    Differences(i) = mean((  (A - B(:,:,i)).^2  ).^.5, 'all'); %mean diff between pics
end
[minValue, minIndex] = min(Differences);
MostSimilar_B = B(:,:,minIndex);

Is that what you want?

[talayeh ghodsi]

thanks for your answer, but no they are not the same size.

and i want to use mutual information for the similarity measure, the best match will be the largest mutual information