Same color illusion

From Wikipedia, the free encyclopedia

The same color illusion—also known as Adelson's checker shadow illusion, checker shadow illusion and checker shadow—is an optical illusion published by Edward H. Adelson, Professor of Vision Science at MIT in 1995.^[1] The squares A and B on the illusion are the same color (or shade), although they seem to be different. This can be proven by sampling the colors of A and B in an image-editing program, which will show that they are in fact the same color. By erasing everything except the two labelled squares, the effect of the illusion can be removed.

Squares A and B are the same color.

A rectangle of the same color has been drawn connecting the two squares.

[edit] See also

• Chubb illusion
• Lilac chaser
• Psychophysics

[edit] References

[edit] External links

• Explanation of the effect
• Illusion of colours
• Video animation - Checkershadow Illusion
• Alternative animation of the illusion
• An interactive presentation of the effect

This optics-related article is a stub. You can help Wikipedia by expanding it.