Illusion designs from friends #4

The copyright of each image belongs to the corresponding creator, to whom contact should be addressed in the case of request for use (even if it is for educational, research or personal use).

since July 18, 2006

"Transparent mountains"

Mountains appear to be transparent.

Copyright Midori Takashima 2007
from Midori Takashima, Tokyo, May 1, 2007

Akiyoshi's comment: This effect depends on bistable transparency according to the Adelson-Anandan-Anderson's X-junction model*.

*Kitaoka, A. (2005) A new explanation of perceptual transparency connecting the X-junction contrast-polarity model with the luminance-based arithmetic model. Japanese Psychological Research, 47, 175-187. Reprint or PDF request to me

Related illusion photo

"Transparent building"

A building in Osaka appears to be transparent. This building is called "Crystal Tower". This photo was taken from the top floor of the Osaka Castle (shown below).

Copyright Akiyoshi Kitaoka 2007 (May 1)

Copyright Akiyoshi Kitaoka 2007 (May 1)

"'Heads of bolds'"

You will see that the perfect red circles become deformed as ellipses; the white areas seem to push the circles that are out of your focus. Furthermore, there seems to emerge a gray bridge (phantom?) within each red circle, trying to connect the black areas. In effect, the circles out of focus start resembling heads of bolts.

Copyright Bruno Curfs 2007
from Bruno Curfs, Netherland, March 3, 2007

Akiyoshi's comment: This interesting illusion might be related to the illusions shown below.

"Illusion of the Gakushi-kaikan"

Each small ellipse is horizontally oriented but appears to tilt toward the neighboring large ellipses.

Produced by Akiyoshi Kitaoka 2005 (October 12)

Dr. Yasushi AGATA, University of Tokyo, discovered this illusion on the carpet of the Gakushi-kaikan, Tokyo, Japan.

Gakushi-kaikan (in Japanese)

"Coffee beans"

Coffee beans are the same circles but appear to be distorted in shape.

(c) Akiyoshi Kitaoka 2005 (February 12)

"Parents and childrens of fish"

The image appears to move.

Copyright KuIchitaro 2007
from KuIchitaro of TOSHIBA Corporation., Tokyo, February 15, 2007

He has just studied how to make an illusion design with my book, drew an image, and sent it to me.

"Glasses-dependent chromatic abberation illusion"

The face appears to bulge out.

Copyright Robert Caron 2006
from Bob Caron, October 11, 2006

Akiyoshi's comment: His nephew's face.


The image appears to move.

Copyright Bennett Foddy 2006
from Bennett Foddy, August 1, 2006

Akiyoshi's comment: It depends on the central drift illusion.


*Uzushio = eddying tide

The central white circle appears to be tinted pink.

Copyright Ryota Sato 2006
from Ryota SATO, Japan, July 18, 2006

Akiyoshi's comment: Color contrast?

Illusion design from friends #3

Illusion design from friends #2

Illusion design from friends #1

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