Classic geometrical illusion 2
since February 14, 2005
"Switchback"
Each row is aligned horizontally but appears to tilt counterclockwise or clockwise alternately.
Copyright Akiyoshi Kitaoka 2005 (October 3)
"Mufflers"
The vertical edges in the left muffler appear to tilt clockwise while theose in the right one appear to tilt counterclockwise.
Copyright Akiyoshi Kitaoka 2005 (September 26)
"Field of flowers"
The horizontally or vertically aligned blue squares appear to tilt.
Copyright Akiyoshi Kitaoka 2005 (September 21)
"Shifting blick walls"
The black horizontal lines are actually parellel but appear to tilt alternately (Lavatory Wall illusion or Montalvo illusion). Moreover, the rows of blicks appear to move laterally.
Copyright Akiyoshi Kitaoka 2005 (August 12)
Sakane, I. (1980) Shin Asobino Hakubutsushi (A New Museum of Fun Book) Part II .Tokyo: Asahi-bunko (pp. 156-165) (in Japanese). (first showing the Montalvo illusion)
Woodhouse, J. M. and Taylor, S. P. (1987) Further studies of the Cafe Wall and Hollow Squares illusions. Perception, 16, 467-471.(showing the Lavatory Wall illusion or the Montalvo illusion)
Kitaoka, A., Pinna, B., and Brelstaff, G. (2004). Contrast polarities determine the direction of Cafe Wall tilts. Perception, 33, 11-20. (reporting that the Lavatory Wall illusion is the Montalvo illusion)
"Railway station"
Striped bars are parallel to each other, but appear to tilt alternately.
Copyright Akiyoshi Kitaoka 2005 (July 12)
A remake of my work in 1997 - 1999
"Illusion of shfted edges" --- Kitaoka, A., Pinna, B., and Brelstaff, G. (2001). New variations of spiral illusions. Perception, 30, 637-646
"A distorted circle"
A ciecle appears to be pressed in the top, bottom, right and left.
by Akiyoshi Kitaoka 2005 (May 18)
Copyright free
I think this image may already be shown in some old literature.
"Cigarettes"
Each of straight cigarettes appears to bend inward.
Copyright Akiyoshi Kitaoka 2005 (April 20)
This illusion is not my original. I do not smoke.
"S-Z illusion"
The horizontal parts of letter Ss appear to tilt clockwise while those of letter Zs appear to tilt counterclockwise. This is the Zöllner illusion.
Copyright Akiyoshi Kitaoka 2005 (April 20)
"Blue stones and boiled eggs"
Blue ellipses and yellow ones are identical in size, but the top-left one and the bottom-right one appear to be larger than the others.
Copyright Akiyoshi Kitaoka 2005 (April 19)
"Fruits"
Horizontally aligned fruits appear to tilt. In addition, they appear to move.
Copyright Akiyoshi Kitaoka 2005 (April 12)
"Noshi"*
*kind of decorations for cerebration
Inner gold squares appear to tilt counterclockwise.
Copyright Akiyoshi Kitaoka 2005 (2/14)
Classic geometrical illusion 1