The latest works 47

since August 28, 2011



"Ben & Aki's Christmas rings 2011"

The rings appear to rotate in the different direction from each other when observers approach or move away from the image fixing their eyes at the center. This illusion is called the Pinna illusion. Moreover, the outer ring appears to expand while the inner one appears to contract. This illusion depends on a variant of the Fraser-Wilcox illusion, which I call the "optimized Fraser-Wilcox illusion, Type IIa". In addition, the central Star of David, made from two Penrose triangles, represents the Star of Bethlehem. The basic idea of this illusion work was presented by Professor Ben Backus, SUNY.

Copyright Akiyoshi Kitaoka 2011 (December 26, caption revised January 15, 2012)



"Fluttering moon"

The moon appears to move.

Copyright Akiyoshi Kitaoka 2011 (December 8)



"Illusory red starfish"

There appear twelve red crosses, but they are cyan or gray, physically. Moreover, X shapes are also illusory; they are the chromatic Vasarely illusion.

Copyright Akiyoshi Kitaoka 2011 (November 21)



"Chick Café Wall illusion"

Four gray horizontal lines are parallel to each other, but the uppermost and third ones appear to tilt counterclockwise while the rest two clockwise.

Copyright Akiyoshi Kitaoka 2011 (November 8)



"Captured sun"

There appear to be an illusory red or yellow rings (chromatic Mach bands). There are physically a black-to-red gradation, a red-to-yellow gradation and a yellow disk.

Copyright Akiyoshi Kitaoka 2011 (November 6)



"Staircases and bats"

There appear to be staircases seen from above or bats seen from below (Schröder staircase). In each image, there are illusory lines of the chromatic Vasarely illusion. For example, for the upper-right image, illusory blue, red, and blue line segments are observed along folds.

Copyright Akiyoshi Kitaoka 2011 (November 6)

References for the Vasarely illusion

Jameson and Hurvich (1975, Leonardo, 8, 125-131, p.129)

Martinez-Conde S and Macknik SL (2001). Society for Neuroscience 31st Annual Meeting, San Diego, CA.

Troncoso, XG, Macknik SL, Martinez-Conde S (2005). Novel visual illusions related to Vasarelyfs enested squaresf show that corner salience varies with corner angle. Perception 34: 409-420.



"Slope illusion of texture paving blocks"

Blocks appear to tilt in depth as compared with the adjacent one(s), though the oblique sides of these trapezoids are straight.

The left blocks: If the nearest or farthest blocks are perceived to be horizontal, the middle block appears to be an ascent.

The right blocks: If the middle block is perceived to be horizontal, the rest appear to be ascents.

Copyright Akiyoshi Kitaoka 2011 (October 22)

cf.

Slope illusion 2 (Mysterious slope in Towa, Iwate, Japan)

Slope illusion 3 (Mysterious slope in Hashikami, Aomori, Japan)



"Illusory contour motion"

Each row appears to move laterally.

Copyright Akiyoshi Kitaoka 2011 (October 16)



"Snakes of two heads"

Each snake appears to move laterally.

Copyright Akiyoshi Kitaoka 2011 (September 22)



"Waterwheels"

The upper-left and lower-right wheels appear to rotate counterclockwise while the rest clockwise.

Copyright Akiyoshi Kitaoka 2011 (September 22)



"A red snake"

A snake appears to move.

Copyright Akiyoshi Kitaoka 2011 (September 5)



"Bed-wetting dream"

Each field appears to expand.

Copyright Akiyoshi Kitaoka 2011 (September 3)



"Fudo-myo-o"

*kind of Bhuddha

Both disks appear to rotate clockwise.

Copyright Akiyoshi Kitaoka 2011 (August 29)



"Blue Fraser-Wilcox illusion"

The left disk appears to rotate counterclockwise while the right one clockwise.

Copyright Akiyoshi Kitaoka 2011 (August 28)


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