(03-27-2018, 05:29 PM)rich2005 Wrote: Have you considered using ImageJ https://imagej.nih.gov/ij/
Slightly different result, it will be due to the Gimp selection.
Change the image convert to binary, check the histogram
looks like https://i.imgur.com/SUOu8Wu.jpg
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edit: In fact that might be the way to go in GIMP
'Colors -> Threshold` to make the image binary
Then in the histogram move the slider over to the left
Gives the number and percentage straight off. https://i.imgur.com/z9Tauju.jpg
Thank you for the edit remarks. I think this will work. Visually, it comes out to the same percentage of white that I calculate from the difference between the white and black pixels. Now to check with the higher ups.
Thanks again!
Mo