Spiral illusion 7

since January 17, 2010



"Spirals of sea butterflies"

Concentric rings appear to be distorted.

Copyright Akiyoshi Kitaoka 2011 (January 21)



"Blue and pink disk spiral"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (April 17)



"Birth of Saturn"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (February 15)



"Crator illusion spirals"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (January 30)



"Fraser spirals, Type II"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (January 23)

Fraser illusion, Type II



"Fraser spirals, Type II"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (January 23)

Fraser illusion, Type II (simple version)




Fraser spiral (simple version)

Copyright Akiyoshi Kitaoka 2010 (April 15)

Copyright Akiyoshi Kitaoka 2010 (May 8)



"Earth and moon spirals 2"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (January 18)

Illusion of oblique edges

Kitaoka, A. (2007) Tilt illusions after Oyama (1960): A review. Japanese Psychological Research, 49, 7-19. PDF



"Earth and moon spirals"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2010 (January 17)

"Psudo-Fraser illusion, Type II"


Spiral illusion 6

Spiral illusion 5

Spiral illusion 4

Spiral illusion 3

Spiral illusion 2

Spiral illusion 1


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