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Archive for October, 2008


Rotating grid illusion

(Saturday, October 25th, 2008)

Rotating grid

Rotating grid

If you show a picture of a rotating grid, the brain will try to group things and it will ook like some parts are rotating together. This is temporal aliasing.

Source: David O’Reilly.

When can a toddler recognize an optical illusion?

(Sunday, October 19th, 2008)

We know that all human beings are able to detect what we usually call an optical illusion (it’s a feature of our brains trying to reconcile illogical forms with what the brain is wired for). However, there was a good question left open: Can a baby see an optical illusion?

Escher cube

Escher cube

A team led by Sarah Shuwairi showed images of optical illusions similar to the one here. By hiding parts critical to the understanding of the illusion in some images and showing the full optical illusion in some other images, they determined that 10-month old babies (and 4-month toddlers) are able to distinguish the illusion from the “normal” image.

Source: ScienceBlogs.

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Fraser optical illusion

(Tuesday, October 14th, 2008)

Fraser optical illusion

Fraser optical illusion

This optical illusion is perfectly classical, but it would be a mess to try and draw it by yourself, no?

Anamorphoses

(Friday, October 10th, 2008)

A French post about the anamorphic optical illusions (on Tutoweb).

optical illusion - anamorphose


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