Is there a way in Photoshop to find the average luminance value of image?

12 years 1 month ago #202870 by Nick Show
Is there some way to have PS calculate what the average gray scale value of the image is? For instance, if I were photographing a "normal" scene with a nice even distribution of tones, I would get a calculation value close to 128 on an 8-bit image.

So essentially I want PS to average out the gray scale value of each pixel.


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12 years 1 month ago #202871 by bcap fish
Open the histogram window on the right hand toolbar, click the little down array and select "Expanded View" and also check "Show Statistics" Then select the luminosity channel, and read the Mean, Median and Std Deviation below it.

Just note that this is selection dependant so make sure you don't have a selection on the image while reading off the values.


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12 years 1 month ago #202874 by Nick Show
Thanks, I will give that a try. :thumbsup:


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12 years 1 month ago #202935 by John Landolfi

bcap fish wrote: Open the histogram window on the right hand toolbar, click the little down array and select "Expanded View" and also check "Show Statistics" Then select the luminosity channel, and read the Mean, Median and Std Deviation below it.

Just note that this is selection dependant so make sure you don't have a selection on the image while reading off the values.


:goodpost: :thumbsup:


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