Classic geometrical illusion 6

since April 15, 2007


"Parallelogram distorting illusion"

The blue or red parallelogram of B appear to be distorted, while the blue or red polygons of A appear to be parallelograms.

Copyright Akiyoshi Kitaoka 2007 (July 14)


"Runways"

The right runway appears to tilt from the vertical more than the left one, though they are identical.

Copyright Akiyoshi Kitaoka 2007 (July 14)

This effect should share the same machanism as that of "The Leaning Tower Illusion".


"Ellipse shape illusion"

The right ellipse appears to be slimmer than the left one, though they are identical in shape.

Copyright Akiyoshi Kitaoka 2007 (July 14)

cf. Shepard illusion or table-top illusion:

Shepard, R. N. (1990) Mind sights: original visual illusions, ambiguities, and other anomalies, with a commentary on the play of mind in perception and art. New York: Freeman.


"Vaulting boxes"

The upper pile of vaulting boxes appears to be larger than the lower one though they are identical in size.

Copyright Akiyoshi Kitaoka 2007 (July 14)


"Baby's head"

The circle appear to be distorted in shape.

Copyright Akiyoshi Kitaoka 2007 (June 25)


"Cuboids"

The lower rectangle appears to be slimmer than the upper one, though they are of the same shape and size.

Copyright Akiyoshi Kitaoka 2007 (June 23)


"Rectangle shape illusion like the Shepard illusion"

The left rectangle appears to be slimmer than the right one, though they are identical. In addition, the right girl appears to be larger than the left.

Copyright Akiyoshi Kitaoka 2007 (June 23)

Copyright Akiyoshi Kitaoka 2007 (June 22)


"Color chopsticks"

Both ends of each chopstick appear to be tapered though each is a rectangle.

Copyright Akiyoshi Kitaoka 2007 (June 13)


"Ohaka illusion"*

*Ohaka = grave; This is a standard shape of graves in Japan. 

The top rectangle is the same as the second one in shape and size, but the former appears to be slimmer than the latter.

Copyright Akiyoshi Kitaoka 2007 (April 26)


"Psychophysics tilt illusion"

The letter rows of "psychophysics" in Chinese characters appear to tilt.

Copyright Akiyoshi Kitaoka 2007 (April 17)

Fechner Day 2007 in Tokyo


"Safety engineering tilt illusion"

The letter rows of "safety engineering" in Chinese characters appear to tilt.

Copyright Akiyoshi Kitaoka 2007 (April 15)


Classic geometrical illusion 5

Classic geometrical illusion 4

Classic geometrical illusion 3

Classic geometrical illusion 2

Classic geometrical illusion 1


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