The latest works 44

since October 8, 2010



"Size proportion illusion of irises"

The diameter of the irises in the right image is half of that of the irises in the left image, but the former appears to be much smaller than it is.

Copyright Akiyoshi Kitaoka 2010 (December 18)

I wonder whether this phenomenon reflects the Delboeuf illusion...





"Under 360 degree"

When observers stereoscopically fuse neighboring images, oblique edges appear to tilt in depth. Both edges of each of the floor, ceiling and the right and left sides, appear to form an acute angle, i.e. less than 90 degree. This means that a revolution is less than 360 degree in the stereoscopic vision!

Copyright Akiyoshi Kitaoka 2010 (December 18)



For cross-fusers:





For uncross-fusers:



"Under 360 degree: a Xmas version"

When observers stereoscopically fuse neighboring images, oblique edges appear to tilt in depth. Both edges of each of the floor, ceiling and the right and left sides, appear to form an acute angle, i.e. less than 90 degree. This means that a revolution is less than 360 degree.

Copyright Akiyoshi Kitaoka 2010 (December 18)




"Under 360 degree with the Leaning Tower illusion"

When observers stereoscopically fuse neighboring images, oblique edges appear to tilt in depth. Both edges of each of the floor, ceiling and the right and left sides, appear to form an acute angle, i.e. less than 90 degree. This means that a revolution is less than 360 degree in the stereoscopic vision!

Copyright Akiyoshi Kitaoka 2010 (December 19)



"Shooting stars"

The three shooting stars are aligned in parallel, the lines appear to diverge upward.

Copyright Akiyoshi Kitaoka 2010 (December 15)

This effect is a variant of the Leaning Tower illusion (Kingdom et al., 2007).



"Brain activity"

"Neurons" appear to scintillate with illusory red or white.

Copyright Akiyoshi Kitaoka 2010 (December 11)

This effect is a variant of the Bergen illusion (Bergen, 1985).



"Radius underestimation"

The raduis of the upper circles is the same length as the thickness of the lower bar, but the former appears to be shorter than the latter.

Copyright Akiyoshi Kitaoka 2010 (November 23)

cf. dumbbel illusion



"Green lights"

Crosses appear to be green (as they are (= cyan)) when seen in the central vision. The others appear to be yellowish or reddish.

Copyright Akiyoshi Kitaoka 2010 (November 16)



"Ocean current"

Rows of white rectangles and crosses appear to move horizontally.

Copyright Akiyoshi Kitaoka 2010 (November 15)



"Ebbinghaus size illusion and lightness illusion"

The right black disk appears to be larger than the left one, though they are the same size (Ebbinghaus size illusion). Moreover, the right group of gray disks appears to be lighter than the left one, though they are the same luminance.

Copyright Akiyoshi Kitaoka 2010 (November 14)


If the contrast polarity of the image is reversed, the right group of gray disks appears to be darker than the left one, though they are the same luminance.



"Centipedes"

The image appears to wave.

Copyright Akiyoshi Kitaoka 2010 (November 6)



"Caterpillars"

The upper disks appear to rotate counterclockwise, while the lower ones clockwise.

Copyright Akiyoshi Kitaoka 2010 (November 5)



"Kaki"

(Japanese persimmon fruits)

The inset appears to move.

Copyright Akiyoshi Kitaoka 2010 (November 3)



"Crater illusion and Giovanelli illusion-like position illusion"

The two eyes are horizontally aligned, but the left one appears to be higher than the right one.

Copyright Akiyoshi Kitaoka 2010 (October 8)


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