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Yellow = Blue Optical illusion

#1 User is offline   PassedOut 

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Posted 2008-February-10, 17:34

Here is a fascinating color illusion: Color tile optical illusion. Look at the tiles within the yellow and blue squares in the middle of the page.

Even though I know (I checked in PhotoShop) that the "blue" tiles on the left are the same (greyish) color as the "yellow" tiles on the right, I can't make my eyes see them as the same.
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#2 User is offline   helene_t 

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Posted 2008-February-10, 18:39

Yes, our color perception is one of relative color. We see dark when the luminance is low given the information we have about light sources, shade effects, and luminance of nearby object with known "real" color.

It is quite difficult to reproduce our color vision artificially, for example to make a fruit picking robot that can see if an orange is green or, well, orange.
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#3 User is offline   Gerben42 

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Posted 2008-February-11, 03:42

:)

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#4 User is offline   gwnn 

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Posted 2008-February-11, 13:31

this can't be! this is a global conspiracy! they have Photoshop and Corel and Paint and everybody in it!!
... and I can prove it with my usual, flawless logic.
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#5 User is offline   barmar 

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Posted 2008-February-11, 13:40

Wow, that's one of the most amazing optical illusions I've ever seen. Usually when you know what's going on in an illusion you can force yourself to see the reality, but I can't get around this one.
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