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.

"Fudo-myo-o"

*kind of Bhuddha

Both disks appear to rotate clockwise.

"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.

ICP2016

"Sushi wave"

The image appears to wave.

"Four-face expansion"

Each field appears to expand.

"Tornado"

The image appears to expand and rotate.

"Spiral pulse"

The image appears to expand.

"Red cliff"

The image appears to move laterally.

"Morays"

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

"A red snake"

A snake appears to move.

"Kaitenzushi"

*Rotating sushi restaurant

Upper rings appears to rotate clockwise while lower rings counterclockwise.

"Rotating red corpuscles"

Each ring appears to expand.

"Bed-wetting dream"

Each field appears to expand.

"Red rotating snakes 3"

Disks appear to rotate.

"Volcano islands"

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

「赤いコメの波２」

図が波打って見える。

「赤いコメの波」

図が波打って見える。

"Psychonomic science of love"

Each ring of hearts appears to rotate.

"Ascending dragon"

A dragon appears to ascend into the sky.

"Takonyudo"

takonyudo = octopus

Each disk appears to rotate.

"Rotating hearts"

Rings of hearts appear to rotate.

"Rotating red flowers"

Each flower appears to rotate.

"Expanding boke flowers"

boke = Japanese quinces

Each flower appears to expand.

"Frame-by-frame playback motion"

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

cf. Wezit

"2009"

Hearts appear to move.

"Ascending and descending hearts"

Hearts appear to ascend or descend.

"Hoshigaki"

hoshigaki = dried persimmons

Fruits appear to move laterally.

"Dance"

Each disk appears to expand.

"Freight cars"

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

"Winding wind"

The image appears to rotate clockwise.

"Pinwheels"

Each pinwheel appears to rotate counterclockwise.

"Time tunnel show 2"

Each disk appears to rotate.

"Two suns"

Each radiating pattern appears to rotate.

"Rotating hearts and Mr. Heart"

Rings of hearts appears to rotate.

Mr. Heart

"Chameleon"

Each ring appears to rotate clockwise.

"Rotating hearts around a girl"

A ring of hearts appears to rotate.

The original image before Gaussian filtering

Copyright Akiyoshi Kitaoka 2008 (December 26)

"Rotating red disks"

Each disk appears to rotate clockwise.

"Open-reel deck 2"

Each reel appears to rotate counterclockwise.

"Open-reel deck"

Each reel appears to rotate counterclockwise.

"Twin manholes"

Each manhole appears to rotate clockwise.

"Rotating red disks"

Disks appear to rotate.

cf. Wezit

"Cyclostomes"

Each disk appears to rotate.

"Endoscope"

It appears as if an endoscope is moving backward.

"Razor rain"

The image appears to expand.

"Dragon thunder"

The image appears to expand.

"Brittle star"

The image appears to expand and rotate.

"Sunshine 2"

Each 'sun' appears to expand.

"Mr. Heart"

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

"Expanding heart"

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

"Heart beats"

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

"Starfish"

Starfish appear to rotate.

"Rotating hearts"

Rings of hearts appear to rotate.

"Rotating red buttons"

Rings appear to rotate clockwise.

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.

Akiyoshi's illusion pages