How to measure % intensity difference between 2 image?

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Kyle
Kyle 2011-7-6
评论： suja rani 2017-5-27
Hi,
May i know how to calculate the percentage intensity difference between 2 image of the same size. Then i need to apply this % of intensity different to another image of different size.

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David Young
David Young 2011-7-6
imDiff = image1 - image2;
imSum = image1 + image2;
percentDiff = 200 * mean(imDiff(:)) / mean(imSum(:));
imAdjusted = (1 + percentDiff/100) * image3;
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Kyle
Kyle 2011-7-7
yep i encountered that, when i tried the code. so i make the image to int16 so that it could store negative value as well.
Thanks
suja rani
suja rani 2017-5-27
why 200 is used for finding the percentage of difference

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