10-22-2023, 06:50 PM
(10-22-2023, 11:56 AM)Krikor Wrote: But... wouldn't it be the opposite? In this case, wouldn't it be 1/3 px black and 2/3 px white?
For each channel you have two pixels where the channel is 0 and one where the channel is 255. So you are sharing each channel value across 3 pixels... So that's one white for two blacks. Another way to compute that average would be to create three equal areas of Red, Green and Blue side-by-side, and average them using Filters > Blur > Pixelize. Coincidentally this also gives a Gray-156.