The checker shadow illusion is an optical illusion published by Edward H. Adelson, Professor of Vision Science at MIT in 1995. 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:
- 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
External Links[]
- http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html
- http://www.businessballs.com/shadow-optical-illusion.htm
- http://bsix12.com/checker-shadow-illusion/
- https://www.keyshot.com/explore-adelsons-checker-shadow-illusion-keyshot/2014/
- http://www.telegraph.co.uk/news/newstopics/howaboutthat/3520448/Optical-Illusions-the-top-20.html?image=6
- http://zigzorg.com/?p=102