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really nice optical trick!
the reason why i am psoting this thread - today i saw something that even if i tried to prove in photoshop still cant belive :)
i could not belive so i went to photoshop,set pixel size to 30, schoose color of square A and connected it with square B! it is the same shade of grey. amazing...how easy can human mind be tricked :)
jsut checking it again and again, icant believe the colors are the same! have to check in photoshop again!
[edited by: Marcia at 9:26 am (utc) on Oct. 20, 2002]
[edit reason] removed link to executable [/edit]
If you copy the colour of square A onto a square on a new layer in Photoshop, then drag this new square across the original layer, it gives you a clear idea as to how the eye is tricked.
Must be that the eye is particularly bad at differentiating shades of gray, and only registers gray in comparison to being a colour darker than or lighter than the surrounding shades.
Mind you the human mind is also bad at differentiating shades of gray - hence we tend to present information as either black or white. ;)
also what i did now is to copy some little square(not all square but jsut little cut out,scrap ) from zoomed pic A and hold it in my mouse (you know ready to paste). then moved it on square A and then on square B and it is the same color:)