Spiral illusion 4

since June 26, 2007


"Swirls"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2008 (June 4)


"Snake"
(a remake)

Concentric rings appear to be a spiral.

Copyright Akiyoshi Kitaoka 2008 (March 10; original 2001?)


"Songs of frogs"
(a remake)

Concentric arrays of dots appear to be spirals.

Copyright Akiyoshi Kitaoka 2008 (January 2008)


"Neural circuit spirals 2"

Concentric circles appear to be spirals (going to the center by rotating clockwise). Moreover, the inner part appears to rotate clockwise (counterclockwise) when observers approach (move away from) the image keeping their eyes fixed at the center.

Copyright Akiyoshi Kitaoka 2007 (August 7)


"Neural circuit spirals"
(a remake)

Concentric circles appear to be spirals (going to the center by rotating counterclockwise).

Copyright Akiyoshi Kitaoka 2007 (August 7)


"Spiral warp"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2007 (June 29)

equiangle = 45 deg

The spiral illusion of the Zöllner illusion:

Kitaoka, A., Pinna, B., and Brelstaff, G. (2001). New variations of spiral illusions. Perception, 30, 637-646.


"Magnetic storm"

Red concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2007 (June 29)

equiangle = 20 deg

The spiral illusion of the Fraser illusion (Fraser spiral):

Fraser, J. (1908) A new visual illusion of direction. British Journal of Psychology, 2, 307-320.

The Fraser illusion of this type:

Skillen, J., Whitaker, D., Popple, A., and McGraw, P. V. (2002) The importance of spatial scale in determining illusions of orientation. Vision Research, 42, 2447-2455.


"Red hose"

Red concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2007 (June 26)

The spiral illusion of the Fraser illusion (Fraser spiral):

Fraser, J. (1908) A new visual illusion of direction. British Journal of Psychology, 2, 307-320.

The Fraser illusion of this type:

Skillen, J., Whitaker, D., Popple, A., and McGraw, P. V. (2002) The importance of spatial scale in determining illusions of orientation. Vision Research, 42, 2447-2455.


"Tornado"

Concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2007 (June 26)

The spiral illusion of the Zöllner illusion:

Kitaoka, A., Pinna, B., and Brelstaff, G. (2001). New variations of spiral illusions. Perception, 30, 637-646.


"Rain of light"

Green concentric rings appear to be spirals.

Copyright Akiyoshi Kitaoka 2007 (June 26)

The spiral illusion of the Zöllner illusion:

Kitaoka, A., Pinna, B., and Brelstaff, G. (2001). New variations of spiral illusions. Perception, 30, 637-646.

The spiral illusion of the Fraser illusion (Fraser spiral):

Fraser, J. (1908) A new visual illusion of direction. British Journal of Psychology, 2, 307-320.

The Fraser illusion of this type:

Skillen, J., Whitaker, D., Popple, A., and McGraw, P. V. (2002) The importance of spatial scale in determining illusions of orientation. Vision Research, 42, 2447-2455.


Spiral illusion 3

Spiral illusion 2

Spiral illusion 1


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