ImageJ "mean" vs Photoshop "mean"?

Posted by David Palermo on Nov 28, 2020; 6:26pm
URL: http://imagej.273.s1.nabble.com/ImageJ-mean-vs-Photoshop-mean-tp5024242.html

I am using my scanner as a densitometer and I am measuring gray patches from a step-wedge in both Photoshop and ImageJ. The mean values are different between each program. Why is that? ImageJ's mean is 41726 and Photoshop's mean of the same patch from the same file is 20861.

Thank you!

David

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