# How to calculate the mean of an image?

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bh dhouha
on 16 Feb 2015

Commented: Kweku Nkrumah
on 15 Jun 2018

How to calculate the mean of an image? Does the code mean2(img) give the right result?

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### Accepted Answer

Image Analyst
on 16 Feb 2015

To calculate the mean of all pixels in the image, without regard to what color channel they came from (if it's a color image), you do

meanIntensity = mean(img(:));

What you did will not do it, as I'm sure you found out.

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Image Analyst
on 16 Feb 2015

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