The latest works 14

Access since March 23, 2006


"MD"

The disk appears to rotate clockwise.

Copyright Akiyoshi .Kitaoka 2006 (April 22)

Sakura 2


"DVD"

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

Copyright Akiyoshi .Kitaoka 2006 (April 22)

Rotating illusion 7


"Clockwise rotating snakes"

Each disk appears to rotate clockwise.

Copyright Akiyoshi .Kitaoka 2006 (April 18)

Rotating snakes: miscellaneous

requested by Shannon


"Expanding watercolor field"

The field tinted orange (actually white: watercolor effect) appears to expand.

Copyright Akiyoshi .Kitaoka 2006 (April 12)

Watercolor effect (Pinna, Brelstaff and Spillmann, 2001; Pinna, Werner and Spillmann, 2003)


"Purple snakes"

Snakes appear to move laterally.

Copyright Akiyoshi .Kitaoka 2006 (April 6)

Rotating illusion 7


"Staircase Ouchi illusion"

The inset appears to move.

Copyright Akiyoshi .Kitaoka 2006 (April 5)

Ouchi illusion

cf.

"Staircase illusion"

The inset appears to move.

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


"Rotating sea snakes"

Rings of sea snakes appear to rotate.

Copyright Akiyoshi .Kitaoka 2006 (April 4)

Kagero 2


"Album"

The left page appears to be tinted blue while the right one appears to be tinted red. I think this phenomenon is identical to the watercolor effect (Pinna, Brelstaff and Spillmann, 2001; Pinna, Werner and Spillmann, 2003)

Copyright Akiyoshi .Kitaoka 2006 (March 31)

Pinna B, Brelstaff G, Spillmann L, 2001 "Surface color from boundaries: a new `watercolor' illusion'' Vision Research 41 2669-2676
Pinna B,Werner J S, Spillmann L, 2003 "The watercolor effect: a new principle of grouping and figure-ground organization'' Vision Research 43 43-52

Pincushion grid illusion of neon color spreading


"Illusory staircase yellow Gelb effect"

The rightmost square appears to be yellow. It seems there is the highest yellowishness rule!

Copyright Akiyoshi .Kitaoka 2006 (March 22)

Illusory staircase Gelb effect vs. Illusory staicase reverse Gelb effect

The Gelb effect refers to a phenomenon that in a homogeneously dark room an intensely lit black card appears to be gray or white. The card suddenly appears to be black when another white card is placed in the visual field (= lightness constancy).

The staircase Gelb effect is the striking demonstration of the Gelb effect exhibited by Professor Alan Gilchrist, Rutgers University. He used five cards of different luminances in the invited lecture held in Tokyo (March 14, 2006). Related lecture

Cataliotti J and Gilchrist A (1995) Local and global processes in surface lightness perception. Perception and Psychophysics, 57, 125-135.

Gilchrist A, Kossyfidis C, Bonato F, Agostini T, Cataliotti J, Li X, Spehar B, Annan V, Economou E.. (1999) An anchoring theory of lightness perception. Psychological Review, 106, 795-834.

"Blue trains"

The upper rows appear to move rightward while the lower ones leftward.

Copyright Akiyoshi .Kitaoka 2006 (March 21)


13 The latest works (March 2006 - March 2006)
12 The latest works (February 2006 - February 2006)
11 The latest works (February 2006 - February 2006)
10 The latest works (January 2006 - February 2006)
9 The latest works (November 2005 - December 2005)
8 The latest works (October 2005 - October 2005)
7 The latest works (September 2005 - October 2005)
6 The latest works (June 2005 - August 2005)
5 The latest works (April 2005 - June 2005)
4 The latest works (March 2005 - April 2005)
3 The latest works (June 2004 - March 2005)
2 The latest works (April 2004 - June 2004)
1 The latest works (August 2003 - May 2004)
0 The latest works (June 2002 - July 2003)


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