The latest works 59

since July 9, 2017


"Expanding heart rings"

The outer rings of hearts appear to expand.

Copyright Akiyoshi Kitaoka 2018 (May 27)


"Invisible person"

An invisible person appears to move.

Copyright Akiyoshi Kitaoka 2018 (May 26)


"Binocular stereopsis and binocular rivalry"

Binocular stereopsis is not impaired by binocular rivalry.

Copyright Akiyoshi Kitaoka 2018 (May 9)


"Additive color change and no binocular rivalry"

Strawberries appear to be reddish in the left image whereas those appear to be bluish in the right image. They do not induce binocular rivalry and strawberries appear to be red-purple.

Copyright Akiyoshi Kitaoka 2018 (May 12)


"Additive color change and binocular rivalry"

Strawberries do not induce binocular rivalry whereas colors in circles do.

Copyright Akiyoshi Kitaoka 2018 (May 12)


"a demo of binocular rivalry"

Red and cyan alternate to each other wholly or partly.

Copyright Akiyoshi Kitaoka 2018 (May 12)


"Moving stripes illusion"

The inset and/or surround appear to move.

Copyright Akiyoshi Kitaoka 2018 (May 12)



For me, strawberries in the left image appear to be reddish whereas those in the right one do not. One of my followers has just reported that he saw the latter reddish, too. May I have your perception? pic.twitter.com/HIhyW5yu6L

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年5月6日

How do you see the images?

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年5月6日

"Illusory blue"

The lower half of the train appears to be bluish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2018 (April 21)







"Images that show vivid colors that do not exist in the palette"

Copyright Akiyoshi Kitaoka 2018 (March 18)


"Hearts of White's effect and hearts of spatial color mixture"

In the upper row, the left heart appears to be darker than the right one, though they are the same luminance (White's effect). In the lower row, where the colors are exhanged between the inset and surround, the left heart appears to be whitish whereas the right one blackish, suggesting the additive color mixture for the former and the subtractive color mixture for the latter.

Copyright Akiyoshi Kitaoka 2018 (March 18)


"Illusory yellow and illusory blue"

Illusory yellow appears at white areas connected to comb bodies (upper row) and illusory blue appears at black areas connected to comb bodies (lower row).

Copyright Akiyoshi Kitaoka 2018 (January 29)


Illusory yellow (upper row) and illusory blue (lower row) pic.twitter.com/u7gbCRCofi

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年1月29日

"Distorting circles illusion"

Circles are the same shape and size but the shape or size appears to be distorted.

Copyright Akiyoshi Kitaoka 2018 (January 5)


"Color-dependent motion illusion and tilt illusion depending on chromatic aberration: red vs. blue (purple)"

The upper block appears to move rightward whereas the lower one leftward. Moreover, for those who wear glasses, horizontally aligned piles appear to tilt.

Copyright Akiyoshi Kitaoka 2017 (December 24)

"Color-dependent motion illusion and tilt illusion depending on chromatic aberration: green vs. blue"

The upper block appears to move rightward whereas the lower one leftward. Moreover, for those who wear glasses, horizontally aligned piles appear to tilt.

Copyright Akiyoshi Kitaoka 2017 (December 24)


"Something rotating"

Something appears to rotate.

Copyright Akiyoshi Kitaoka 2017 (December 24)


"Yellow or blue; white or black"

The left heart appears to be yellowish whereas the right one bluish. At a distance, the left heart appears to be whitish whereas the right one blackish.

Copyright Akiyoshi Kitaoka 2017 (November 4)


"3D printer"

The inset appears to float and move.

Copyright Akiyoshi Kitaoka 2017 (August 4)


"Dancing girl spirals with the yellow background"

Concentric circles appear to be spirals that go to the center rotating counterclockwise.

Copyright Akiyoshi Kitaoka 2017 (July 5)


58 The latest works (March 2016 - March 2017)
57 The latest works (January 2015 - February 2016)

56 The latest works (September 2014 - December 2014)
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54 The latest works (January 2014 - April 2014)
53 The latest works (January 2014 - January 2014)
52 The latest works (September 2013 - January 2014)
51 The latest works (April 2013 - September 2013)
50 The latest works (December 2012 - April 2013)
49 The latest works (August 2012 - December 2012)
48 The latest works (February 2012 - August 2012)
47 The latest works (August 2011 - December 2011)

46 The latest works (May 2011 - August 2011)
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