Checker shadow illusion
From Wikipedia, the free encyclopedia
(Redirected from Same color illusion)
The checker shadow illusion is an optical illusion published by Edward H. Adelson, Professor of Vision Science at MIT in 1995.[1] The image depicts a checkerboard with light and dark squares. The optical illusion is that the area of the image labeled A appears to be a darker color than the area of the image labeled B. However, they are actually exactly the same color.
This can be proven using the following methods:[2]
- Opening the illusion in an image editing program and using the eyedropper tool to verify that the colors are the same
- Isolating the squares. Without the surrounding context, the effect of the illusion is dispelled. This can be done by using the selection tool in some image editing programs.
- Using a photometer
- Connecting the squares with a rectangle of the same color, as seen below in the middle figure.
|
|
|
See also [edit]
References [edit]
- ^ Adelson, Edward H. (2005). "Checkershadow Illusion". Retrieved 2007-04-21.
- ^ http://web.mit.edu/persci/people/adelson/checker_more_evidence.html
External links [edit]
- A high resolution remake of the illusion
- Real-life Proof
- Explanation of the effect
- Illusion of colours
- Video animation
- Alternative animation of the illusion
- An interactive presentation of the effect
- An interactive click-and-drag demonstration of the effect
 |
This optics-related article is a stub. You can help Wikipedia by expanding it. |
