The latest works

(before July 2003)

After August 2003

"Dongururin"*

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

Rings of donguri appear to rotate.

"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.

"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

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

"Spa"

Rectangles appear to move.

"Expanding cushions"

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

"Convection"

Round objects appear to move around the squares slowly.

"A black hole"

A black hole appears to approach you.

"Toothaches"

The cheeks appear to move.

"Phantom spirals"

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

"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).

^*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.

^*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.

"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.