The latest works
(The first one)


"Dongururin"*

*Rotation of donguri (acorns). "Gururin" means rotation.

Rings of donguri appear to rotate.

Copyright A.Kitaoka 2003 (July 3, 2003)


"Gaku ga gakugaku"*

*Frames are misaligned.

Blue frames that form squares appear to be misaligned at the borders between red and green. I imagine some people do not see this illusion. In addition, the Hermann grid illusion and von Bezold's chromatic assimilation can be observed.

Copyright A.Kitaoka 2003 (June 16, 2003)


"Advance"

- Thanks to Michael -

The ring appears to approach. Moreover, the ring appears to rotate when observers approach or move away from the figure while fixating at the center. Furthermore, the color of the ring appears to be different when approaching and when moving away.

A related work with the same name

Copyright A.Kitaoka 2003 (May 25, 2003)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003

(I corrected English in my web pages with the help of Michael on 25th May, 2003)


"Spa"

Rectangles appear to move.

Copyright A.Kitaoka 2003 (May 16, 2003)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003


"Expanding cushions"

Cushions appear to expand. These figures consist of squares or rectangles.

Copyright A.Kitaoka 2003 (April 30, 2003)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003


"Convection"

Round objects appear to move around the squares slowly.

Copyright A.Kitaoka 2003 (April 2, 2003)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003


"A black hole"

A black hole appears to approach you.

Copyright A.Kitaoka 2003 (February 25, 2003)


"Toothaches"

The cheeks appear to move.

Copyright A.Kitaoka 2003 (February 10, 2003)


"Phantom spirals"

There is luminance modulation on black stripes, not on white stripes. The perception of misty spirals is due to white phantoms.

Copyright A.Kitaoka 2003 (January 26, 2003)


"The music"

Illusory black dots abruptly appear or disappear in white circles when we see the figure freely (= the scintillation grid illusion*1). On the other hand, the white circles disappear when we fixate at the center (the vanishing disk illusion*2,*3).

Copyright A.Kitaoka 2002 (December 28, 2002)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003

*1For the scintillation grid illusion, see:

Schrauf, M., Lingelbach, B., Lingelbach, E., Wist, E.R. (1995) The Hermann grid and the scintillation effect. Perception, 24, suppl. 88-89
--- It should be noted that actually the third author Elke Lingelbach discovered the effect.
Schrauf, M., Lingelbach, B., Wist, E.R. (1997) The scintillating grid illusion. Vision Research, 37, 1033-1038.
Institut fur Augenoptik Aalen --- Click "Tauschungen" (illusions).

*2For the vanishing disk illusion, see:

McAnany, J. J., & Levine, M. W. (2002). The vanishing disk; a revealing quirk of the scintillating grid illusion [Abstract]. Journal of Vision, 2(7), 204a, http://journalofvision.org/2/7/204/, DOI 10.1167/2.7.204

*3For the vanishing disk illusion, I think that Ninio and Stevens's paper might be the first report:

Ninio, J. & Stevens, K. A. (2000). Variations on the Hermann grid: an extinction illusion. Perception, 29, 1209-1217.

<I thank Bernd for giving me beautiful panels and information>

*4For the vanishing disk illusion, they published the paper in Vision Research, where they called this phenomenon "blanking": new ! <June 16, 2004>

McAnany, J. J., & Levine, M. W. (2004). The blanking phenomenon: a novel form of visual disappearance. Vision Research, 44, 993-1001.

"Star clusters"

The checkerboard is vertical or horizontal but appears to tilt. Parts of the figure appear to move.

Copyright A.Kitaoka 2002 (December 13, 2002)


"Shiosai"*

*The sound of the sea

The figure appears to be made up of four kinds of color, but actually there are three. The original illusion is Professor Adelson's modulation of the Koffka ring.

Copyright A.Kitaoka 2002 (December 1, 2002)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003


"Seaweed"

Although the blocks are aligned vertically, the figure appears to show curves.

Copyright A.Kitaoka 2002 (November 21, 2002)


"The sun"

The figure appears to bulge out, even though all the squares in the figure are equal. Moreover, part of the figure appears to move.

Copyright A.Kitaoka 2002 (November 6, 2002)
(c)Akiyoshi Kitaoka "Trick eyes 2" Tokyo: KANZEN 2003


"Karakasa"*

*a kind of umbrella

The inside red appears to be purple-red.

Copyright A.Kitaoka 2002 (October 21, 2002)


"Joro-gumo"*

*a kind of spider

The inset appears to move.

Copyright A.Kitaoka 2002 (July 26, 2002)
(c)Akiyoshi Kitaoka "Trick eyes" Tokyo: KANZEN 2002


"Packed cherries"

The inset appears to move.

Copyright A.Kitaoka 2002 (July 12, 2002)
(c)Akiyoshi Kitaoka "Trick eyes" Tokyo: KANZEN 2002

Works with different colors


"Earthquake"

The center block and the flanking blocks appear to move relative to each other.

Copyright A.Kitaoka 2002 (June 25, 2002)
(c)Akiyoshi Kitaoka "Trick eyes" Tokyo: KANZEN 2002


"Wedding in Japan"

Squares appear to be distorted and the whole figure appears to wave.

Copyright A.Kitaoka 2002 (June 11, 2002)
(c)Akiyoshi Kitaoka "Trick eyes" Tokyo: KANZEN 2002


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