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Archive for May, 2009


One grey for all

(Friday, May 29th, 2009)

On the drawing below, the grey colour of the squares marked as A and B is exactly the same. Still…

Illusion d'optique de Edward H. Adelson, Professor of Vision Science at MIT

From Edward H. Adelson, Professor of Vision Science at MIT

Perception of lightness

(Thursday, May 21st, 2009)

It is not often that you find the most simple and lighter illusions described as actively than on the web site for the MIT (Massachussets Institute of Technology).

Lightness Perception and Lightness Illusions
interactive movies based on a paper by Edward H. Adelson

Anamorphosis

(Wednesday, May 13th, 2009)

Anamorphosis is a technique to hide images in another image. It has long been used by painters. And some of them are quite well known like the The Ambassadors (Hans Holbein the Younger, 1533) below.

<em>The Ambassadors</em> (Hans Holbein the Younger, 1533)

The Ambassadors (Hans Holbein the Younger, 1533)

In this painting, there is a highly deformed skull appearing like a whitish blade at the bottom of the painting.

Learn everything about anamorphosis from Jessica Palmer in ScienceBlogs.

Warp illusion

(Saturday, May 2nd, 2009)

Instructions:
1. Stare at the image for 10 seconds
2. Look at something — your hand, a book, your friend
3. Enjoy!

For more on illusions — and the delight of our buggy minds — see Al Seckel’s 2004 TEDTalk.


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