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Saturday, March 24, 2012

Don't trust what you see :)

We always trust what we see from our own eyes, but after looking at some pictures below, i can make sure u won't trust your eyes again.

  • Illusions

Delightful illusions

Distortion illusions

The famous Cafe Wall Illusion was discovered by Richard Gregory, on a cafe wall in Bristol, England. It develops when a staggered arrangement of light and dark bricks are separated by thin lines of 'mortar' whose brightness is intermediate between the brightness of the light and dark bricks. This creates a powerful impression of criss-crossing 'slant' in the perfectly horizontal 'mortar' lines.
Cafe Wall
This is a perfectly round circle, but the slanting lines appear to distort it.
Distorted Circle
The vertical lines are straight and parallel, but they look as if they are bowed outwards. The slanting lines simulate perspective and create a false impression of depth. Discovered by the physiologist Ewald Hering (1861).
Hering's Illusion
Probably the most famous and most studied illusion was created by German psychiatrist Franz M�ller-Lyer in 1889. Which of the two vertical line segments is longer? Although your visual system tells you that the right one is longer, a ruler would confirm that they are equal in length.
Mueller-Lyer
The horizontal lines are parallel, but the slanting lines makes them appear to diverge. Discovered in 1860 by F. Z�llner. He described it in a letter to physicist and scholar J. C. Poggendorff, editor of Annalen der Physik und Chemie, who subsequently discovered the related Poggendorff illusion.
Zollner's Illusion


Ambiguous illusions
The white triangle looks very real, although there's no triangle per se. 
wine goblet - or two faces in profile? 
Impossible Illusions


Motion Illutions

/Recreation/Illusions/Motion/Ouchi.shtml
Ouchi 
Akiyoshi Kitaoka "Rotating Snakes" illusion presents an example of radial drift illusion caused by line ambiguity in peripheral visual field. Even though this image has been downsized and reproduced in black and white, if you stare at the center of this image the illusion of rotational drift in the periphery is obvious. This illusion is most likely due to a bug in the cortical lateral line-resolution process which causes ambiguous data in the visual periphery to remain unresolved, thus lines cannot hold and instead creep and drift, creating the illusion of gradual radial movement. This creeping of line and shade in the periphery is similar to animated hallucinations seen on a light psychedelic trip.[
Rotating Snakes

Stare at the center and move your head forwards and backwards.
Rotator


Unstable Illusions

Some two-dimensional figures can be interpreted as solid objects in more than one way. A well-known example of this is the flat representation of a wire-frame cube, which can be seen as if from above, or below.
The Necker Cube



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