Classic geometrical illusion 16

since November 15, 2010



"Inducer's luminance contrast-dependent thickness illusion"

Vertical line segments in the right half appear to be thicker than those in the left half, though they are the same thickness.

Copyright Akiyoshi Kitaoka 2011 (May 9)



"Desktop PC illusion"

Although the two PC are the same size and shape, the green side of the right PC appears to be larger than that of the left PC while the gray side of the left PC appears to be larger than that of the right PC. (The right object appears to be positioned rotating clockwise slightly if seen from above)

Copyright Akiyoshi Kitaoka 2011 (March 23)

Thanks to Hiroko sensei

I imagine this effect is closely related to the Leaning Tower illusion.


The same effect is observed in other images, too.


Ginkaku (The "Siver Palace")
Copyright Akiyoshi Kitaoka 2011 (March 24)



cf.

"Size illusion of oblique faces"

The right face appears to be larger than the left one, though they are the same size.

Copyright Akiyoshi Kitaoka 2008 (July 16)


Poser 7 Near_me


Poser 6 James Casual


Poser 7 Simon G2 Casual

"Size illusion of oblique faces"

The right face appears to be larger than the left one, though they are the same size.

Copyright Akiyoshi Kitaoka 2011 (March 26)


Poser 7 crocodile

"Size illusion of oblique faces"

The left face appears to be larger than the right one, though they are the same size. For crocodile, the size of face appears to be estimated using the side view while the front view seems to be adopted for the judgment of the size of human faces.

Copyright Akiyoshi Kitaoka 2011 (March 26)


Poser 7 Near_me

"Size illusion of oblique faces: an elevation version"

The lower face appears to be larger than the upper one, though they are the same size.

Copyright Akiyoshi Kitaoka 2011 (March 26)


Poser 7 Near_me

"Size illusion of oblique faces: an elevation version 2"

The upper face appears to be larger than the lower one, though they are the same size. Or the lower head appears to tilt backward larger than does the upper one.

Copyright Akiyoshi Kitaoka 2011 (March 26)



"Shrinking illusion"

Each circle appears to shrink from the tip of the protruding angle of a diamond.

Copyright Akiyoshi Kitaoka 2011 (February 28)

Hiroyuki Hagura, the head of "3D Forum", Tokyo, discovered this effect on February 28, 2011.



"Off-the-mark illusion"

The soldier appears to aim his gun at the red or green balls, but he is actually shooting the blue one as shown below. The original idea was proposed by Professor Eiji Watanabe.

Copyright Eiji Watanabe and Akiyoshi Kitaoka 2011 (February 19)




cf. Watanabe illusion


"2011 u"

The diameter of the irises in the right image is half of that of the irises in the left image, but the former appears to be much smaller than it is. Moreover, the girl appears to look at "23", but actually she looks at the pink Chinese character. This eye-direction illusion was first produced by Professor Watanabe.

Copyright Akiyoshi Kitaoka 2010 (December 28)


"Fishmen"

(not fishermen)

Four rows of "fishmen" appear to tilt alternately, though they are horizontally aligned.

Copyright Akiyoshi Kitaoka 2011 (January 21)


"Ohayogozaimasu and Konnichiwa tilt illusion"

Ohayogozaimasu = Good morning.
Konnichiwa = Hellow, Hi

Copyright Akiyoshi Kitaoka 2011 (February 15)


"Kenkyu-shiko tilt illusion"

Kenkyu-shiko = Tendency toward academic study

Copyright Akiyoshi Kitaoka 2011 (February 22)


"Osaka prefacture tilt illusion"

Copyright Akiyoshi Kitaoka 2011 (February 4)



"Osaka city tilt illusion"

Copyright Akiyoshi Kitaoka 2011 (February 4)


Four rows of "academic meeting" appear to tilt alternately, though they are horizontally aligned.

Copyright Akiyoshi Kitaoka 2010 (November 29)


"Sir Beard"

The innermost dots of both eyes appear to be positioned more inner than both ends of the mouth, though they are aligned vertically.

Copyright Akiyoshi Kitaoka 2010 (November 23)


"Amodal completion-dependent (?) bar-length expansion illusion"

The lowermost bars appear to be longer thatn the rest.

Copyright Akiyoshi Kitaoka 2010 (November 15)


Classic geometrical illusion 15

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Classic geometrical illusion 7

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Classic geometrical illusion 5

Classic geometrical illusion 4

Classic geometrical illusion 3

Classic geometrical illusion 2

Classic geometrical illusion 1


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