Calculate entropy of an MR image

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Zee Idrees
Zee Idrees on 5 Nov 2018
Commented: Zee Idrees on 5 Nov 2018
I have to calculate entropy of mr image. I used both methods but it gives different ans... Can anyone help??
% Find entropy
E = entropy(realimg(:));
% lg = log2(sum(realimg(:)));
en = -sum(realimg(:).*log2(realimg(:)));

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Accepted Answer

Image Analyst
Image Analyst on 5 Nov 2018
Simply do
>> edit entropy.m
to discover what their formula is and how it differs from yours. It will be obvious.

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