File:Grey square optical illusion.PNG
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Summary
[edit]DescriptionGrey square optical illusion.PNG | An optical illusion. Square A is exactly the same shade of grey as square B. See demonstration. | ||
Date | Original in 1995, this file in January 2004 | ||
Source | File created by Adrian Pingstone, based on the original created by Edward H. Adelson | ||
Author | Original by Edward H. Adelson, this file by Gustavb | ||
Permission (Reusing this file) |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:20, 24 May 2016 | 1,087 × 844 (143 KB) | Avayak (talk | contribs) | optimized losslessly | |
21:13, 13 January 2008 | 1,087 × 844 (159 KB) | Mahahahaneapneap (talk | contribs) | pngcrushed | ||
03:54, 24 April 2007 | 1,087 × 844 (214 KB) | Jrockley (talk | contribs) | much larger version | ||
00:41, 9 April 2007 | 522 × 408 (70 KB) | Jrockley (talk | contribs) | Prepared for Wikipedia by Adrian Pingstone in January 2004, based on the [http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html original] created by Edward H. Adelson. See also [http://en.wikipedia.org/wiki/Same_color |
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