EIP19 (Empirical Research in Psychology), Belgrade, Serbia
March 29-31, 2019

A demo of a variety of illusions I study

Akiyoshi KITAOKA, Ritsumeikan University, Osaka, Japan email

since March 25, 2019  Handout

My talk in EIP19 "Two types of spatial color mixtures and color illusions"

"Akiyoshi Kitaoka and Kyoro-chan (mascot of a chocolate snack)"

The head of the bird appears to be reddish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2019 (February 24)

森永チョコボール(Morinaga's Chocolate Balls)

"Tram color illusion"

The tram appears to be bluish, though they are reddish.

Copyright Akiyoshi Kitaoka 2015 (January 5)

My visit to Serbia in 2014

In image E, the tram appears to be bluish, though all the pixels are reddish.

"Akiyoshi Kitaoka and Kyoro-chan 2"

My face appears to be reddish, though the pixels are greenish.

Copyright Akiyoshi Kitaoka 2019 (February 24)

"Akiyoshi Kitaoka with an illusory reddish face"

The face appears to be reddish, though the pixels are green-bluish (cyan hue).

Copyright Akiyoshi Kitaoka 2017 (April 10)

Kitaoka, A. (2014). Visual illusion in ARTPOP and pop art. Japanese Journal of Psychonomic Science, 32(2), 232-234. PDF --- PDF (scanned copy)

Gaga and Aki

New color illusions

Additive color mixture image (left) and subtractive color mixture image (right)

"White and black with RGB"

The hair and clothes in the left image appear to be whitish whereas those in the right one to be blackish, though they consist of the same RGB (red, green, blue) stripes.

Copyright Akiyoshi Kitaoka 2016 (August 15)

Expanded image

Movie demo

"Rotating snakes"

Each disk appears to rotate 'spontaneously' in the constant direction, from black to blue, white, yellow, back to black.

Copyright Akiyoshi Kitaoka 2003 (September 2) (updated February 16, 2013)

"Drifting Emboss illusion"
(sine type)

The inset appears to move.

Copyright Akiyoshi Kitaoka 2016 (February 15)

"Pack of rotating red snakes"

Rings appears to rotate slowly or quickly.

Copyright Akiyoshi Kitaoka 2008 (March 19)

(a remake)

Concentric rings appear to be a spiral.

Copyright Akiyoshi Kitaoka 2008 (March 10; original 2001?)

This slope appear to be rather acute, though it has a tilt of 6.1% (3.49º).

Copyright Akiyoshi Kitaoka 2017 (September 8) Photo taken with a telescopic lens from Daikon Island

Photos of Eshima Ohashi Bridge

"Primrose's field"

This checkered background consists of squares but appears to wave. In addition, this figure also shows a waving motion illusion.

Copyright A.Kitaoka 2002

Kitaoka, A. (2016). Motion illusions in stationary images. Invited Address, 31st International Congress of Psychology (ICP2016), PACIFICO Yokohama, Japan, July 28, 2016. Presentation (html) --- Handout (doc)


Akiyoshi's illusion pages