The color-dependent Fraser-Wilcox illusion

since April 27, 2012 previous version

Kitaoka, A. (2014). Color-dependent motion illusions in stationary images and their phenomenal dimorphism. Perception, 43(9), 914-925. Website



"Rotating red fruits"

Rings of fruits appear to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 19)



"Fudo-myo-o"

*kind of Bhuddha

Both disks appear to rotate clockwise.

Copyright Akiyoshi Kitaoka 2011 (August 29)



"ICP 2016 in Yokohama, Japan 2"

The International Conference of Psychology will be held in Yokohama, Japan in 2016. In this image, 'ICP2016' appears to slide rightward while 'JAPAN' leftward.

Copyright Akiyoshi Kitaoka 2011 (September 5)

ICP2016



"Sushi wave"

The image appears to wave.

Copyright Akiyoshi Kitaoka 2011 (September 5)



"Four-face expansion"

Each field appears to expand.

Copyright Akiyoshi Kitaoka 2011 (September 5)


"Tornado"

The image appears to expand and rotate.

Copyright Akiyoshi Kitaoka 2009 (January 16)


"Spiral pulse"

The image appears to expand.

Copyright Akiyoshi Kitaoka 2009 (January 16)



"Red cliff"

The image appears to move laterally.

Copyright Akiyoshi Kitaoka 2008 (December 29)



"Morays"

The uppermost and lowermost morays appear to move rightward, while the rest do leftward.

Copyright Akiyoshi Kitaoka 2009 (September 5)



"A red snake"

A snake appears to move.

Copyright Akiyoshi Kitaoka 2011 (September 5)



"Kaitenzushi"

*Rotating sushi restaurant

Upper rings appears to rotate clockwise while lower rings counterclockwise.

Copyright Akiyoshi Kitaoka 2011 (September 4)


"Rotating red corpuscles"

Each ring appears to expand.

Copyright Akiyoshi Kitaoka 2011 (September 5)



"Bed-wetting dream"

Each field appears to expand.

Copyright Akiyoshi Kitaoka 2011 (September 3)


Copyright Akiyoshi Kitaoka 2011 (February 12)


Copyright Akiyoshi Kitaoka 2011 (February 12)



"Red rotating snakes 3"

Disks appear to rotate.

Copyright Akiyoshi Kitaoka 2009 (June 6)



"Volcano islands"

Each disk appears to rotate following to eye movement or a blink.

Copyright Akiyoshi Kitaoka 2011 (January 31)



「赤いコメの波 2」

図が波打って見える。

Copyright Akiyoshi Kitaoka 2009 (June 12)



「赤いコメの波」

図が波打って見える。

Copyright Akiyoshi Kitaoka 2008 (December 22)



"Psychonomic science of love"

Each ring of hearts appears to rotate.

Copyright Akiyoshi Kitaoka 2011 (October 10)


"Ascending dragon"

A dragon appears to ascend into the sky.

Copyright Akiyoshi Kitaoka 2009 (January 19)

Copyright Akiyoshi Kitaoka 2011 (February 12)



"Takonyudo"

takonyudo = octopus

Each disk appears to rotate.

Copyright Akiyoshi Kitaoka 2009 (January 11)



"Rotating hearts"

Rings of hearts appear to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 23)





Copyright Akiyoshi Kitaoka 2008 (December 24)




Copyright Akiyoshi Kitaoka 2008 (December 25)



"Rotating red flowers"

Each flower appears to rotate.

Copyright Akiyoshi Kitaoka 2009 (June 12)



"Expanding boke flowers"

boke = Japanese quinces

Each flower appears to expand.

Copyright Akiyoshi Kitaoka 2008 (December 20)



"Frame-by-frame playback motion"

Triggered by eye movements, the upper half appears to move rightward while the lower one leftward.

Copyright Akiyoshi Kitaoka 2008 (December 18)

cf. Wezit

Copyright Akiyoshi Kitaoka 2011 (February 12)



"2009"

Hearts appear to move.

Copyright Akiyoshi Kitaoka 2008 (December 23)





Copyright Akiyoshi Kitaoka 2008 (December 24)





Copyright Akiyoshi Kitaoka 2008 (December 25)



"Ascending and descending hearts"

Hearts appear to ascend or descend.

Copyright Akiyoshi Kitaoka 2008 (December 23)



"Hoshigaki"

hoshigaki = dried persimmons

Fruits appear to move laterally.

Copyright Akiyoshi Kitaoka 2008 (December 22)



"Dance"

Each disk appears to expand.

Copyright Akiyoshi Kitaoka 2011 (February 8)



"Freight cars"

The cars in front appear to move leftward while those behind appear to move rightward.

Copyright Akiyoshi Kitaoka 2008 (December 18)

Copyright Akiyoshi Kitaoka 2008 (December 29)

Copyright Akiyoshi Kitaoka 2011 (February 12)



"Winding wind"

The image appears to rotate clockwise.

Copyright Akiyoshi Kitaoka 2009 (January 19)



"Pinwheels"

Each pinwheel appears to rotate counterclockwise.

Copyright Akiyoshi Kitaoka 2009 (January 16)



"Time tunnel show 2"

Each disk appears to rotate.

Copyright Akiyoshi Kitaoka 2009 (January 16)



"Two suns"

Each radiating pattern appears to rotate.

Copyright Akiyoshi Kitaoka 2009 (January 6)


"Rotating hearts and Mr. Heart"

Rings of hearts appears to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 30)

Mr. Heart


"Chameleon"

Each ring appears to rotate clockwise.

Copyright Akiyoshi Kitaoka 2008 (December 29)



"Rotating hearts around a girl"

A ring of hearts appears to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 26)



The original image before Gaussian filtering

Copyright Akiyoshi Kitaoka 2008 (December 26)




"Rotating red disks"

Each disk appears to rotate clockwise.

Copyright Akiyoshi Kitaoka 2008 (December 25)



"Open-reel deck 2"

Each reel appears to rotate counterclockwise.

Copyright Akiyoshi Kitaoka 2008 (December 22)



"Open-reel deck"

Each reel appears to rotate counterclockwise.

Copyright Akiyoshi Kitaoka 2008 (December 22)



"Twin manholes"

Each manhole appears to rotate clockwise.

Copyright Akiyoshi Kitaoka 2008 (December 19)



"Rotating red disks"

Disks appear to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 18)

cf. Wezit



"Cyclostomes"

Each disk appears to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 18)



"Endoscope"

It appears as if an endoscope is moving backward.

Copyright Akiyoshi Kitaoka 2009 (January 19)



"Razor rain"

The image appears to expand.

Copyright Akiyoshi Kitaoka 2009 (January 19)



"Dragon thunder"

The image appears to expand.

Copyright Akiyoshi Kitaoka 2009 (January 19)



"Brittle star"

The image appears to expand and rotate.

Copyright Akiyoshi Kitaoka 2009 (January 19)



"Sunshine 2"

Each 'sun' appears to expand.

Copyright Akiyoshi Kitaoka 2009 (January 16)



"Mr. Heart"

The mouth appears to expand when observers see in the periphery.

Copyright Akiyoshi Kitaoka 2008 (December 26, 29)



"Expanding heart"

The heart appears to expand when observers see in the periphery.

Copyright Akiyoshi Kitaoka 2008 (December 26)



"Heart beats"

The left heart appears to contract while the right one appears to expand.

Copyright Akiyoshi Kitaoka 2008 (December 23)



"Starfish"

Starfish appear to rotate.

Copyright Akiyoshi Kitaoka 2011 (August 30)



"Rotating hearts"

Rings of hearts appear to rotate.

Copyright Akiyoshi Kitaoka 2008 (December 23)



"Rotating red buttons"

Rings appear to rotate clockwise.

Copyright Akiyoshi Kitaoka 2009 (September 5)


High-resolution file


Cite as:
Yanaka K, Hilano T, 2011, "Mechanical shaking system to enhance "Optimized Fraser–Wilcox Illusion Type V"" Perception 40 ECVP Abstract Supplement, page 171

Mechanical shaking system to enhance "Optimized Fraser–Wilcox Illusion Type V"

K Yanaka, T Hilano

We developed a mechanical shaking system to enhance the Fraser–Wilcox illusion. The illusion, originally reported in 1979 and later classified as a peripheral drift illusion, is very unique because the image looks like it is rotating while actually being perfectly still. Recently Kitaoka presented an improved version called “Optimized Fraser–Wilcox Illusion Type V”, in which the effect is considerably boosted by using red and blue (http://www.psy.ritsumei.ac.jp/∼akitaoka/OFWtypeV.html). However, not everyone can perceive the illusion because it is still faint. Therefore, we presented a system that greatly enhances the illusion by automatically shaking the image displayed on the PC screen with our software (Hilano and Yanaka, 2011, VISAPP 2011, pp 405-408]. However, the fact that a PC screen consists of tens of frames per second may affect the illusion. Therefore, we developed a mechanical system in which the board on which the illusion image is printed is put in a frame. Although there is space between them, the board stays nearly at the center of the frame because several rubber cords connect the frame and the board. The board vibrates when the rotation of the motor is transmitted to the board. As a result of the experiment, a stronger illusion was observed.

<March 26, 2012>


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