Unbelievable optical illusion

This one’s pretty neat because it’s so damn unbelievable:
optil.jpg

If you don’t believe it, use a color picker tool (like Color Picker) or crop out the 2 squares with a graphics program.

Source: Edward H. Adelson’s Checkershadow Illusion with explanation

9 Comments & TrackBacks ()

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Ryan's Gravatar

You mean the background of the squares are the same color, or the text (”A” & “B”) are the same color. The latter I can believe, the former I cannot.

Posted by: Ryan on October 10, 2003 6pm

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anon's Gravatar

That’s right, they are both 6B6B6B RGB.

Posted by: anon on October 10, 2003 6pm

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Carlos E. Perez's Gravatar

Unbelievable!

If you got windows, capture the screen (ctrl-printscreen) and use paint to cut out each square to compare. It’s the same shade!

Carlos

Posted by: Carlos E. Perez on October 10, 2003 6pm

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Keith Wedinger's Gravatar

How in the world is that possible? The colors to the naked eye are clearly different.

Posted by: Keith Wedinger on October 10, 2003 7pm

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Patrick's Gravatar

Yeah, that is… something else.

Posted by: Patrick on October 11, 2003 3am

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Andrew's Gravatar

The orignal page of this gives a link to why this is so:

“The visual system is not very good at being a physical light meter, but that is not its purpose. The important task is to break the image information down into meaningful components, and thereby perceive the nature of the objects in view.”

Posted by: Andrew on October 11, 2003 10am

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Blue Sky On Mars's Gravatar

Cool checkerboard optical illusion
I just had to link to this. Is it grey or is it white? redemption in a blog: Unbelievable optical illusion…

Posted by: Blue Sky On Mars on October 12, 2003 11pm

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Marilyn Sta. Maria's Gravatar

Amazing!

I tried cutting the two section and got the same shades. If your going to look at the picture, they’re really far more different!

I hardly can’t believe this, but is true!

Posted by: Marilyn Sta. Maria on August 13, 2004 7pm

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when mistery is table it will double grass's Gravatar

I enjoyed reading your stuff. Cool site. coolblooded is feature of astonishing TV

Posted by: when mistery is table it will double grass on May 30, 2006 2am

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