Free-fuse each pair of neighbors. Then you will see a stereoscopic object.

Access since February 13, 2005


"Stereogram for practice"

The upper face appears to be behind the frame while the lower one appears to be in front of the frame.

Copyright Akiyoshi.Kitaoka 2006 (June 30)

"Explanation of binocular stereopsis"

When A is nearer to the observer than is B, the image of A is projected to a more temporal part in each retina than that of B (binocular disparity). Based upon this disparity, the brain produces binocular stereopsis of the positions of A and B.

Copyright Akiyoshi.Kitaoka 2006 (June 30)

means the right eye in Japanese (probably also in Chinese), whilemeans the left eyes.

The upper stereogram is availble for uncross-fusers while the lower one for cross-fusers.

"Stereogram of a girl of blue eyes"

Several parts appear to tilt in the depth direction.

Copyright Akiyoshi.Kitaoka 2006 (March 3)

"Hanabi 2"

Columns appear to be alternately placed in one of the two different depths, though the columns (rectangles) have no disparity.

Copyright Akiyoshi.Kitaoka 2005 (June 2)

There is binocular rivarly, too. 'Hanabi' are fireworks.

"Back to the future through the window of enlightenment"

The blue square appears to move back when it appears behind the windows.

Copyright Akiyoshi.Kitaoka 2005 (June 2)

It seems that the blue square appears to only shrink in the same depth when it has crossed disparity (Varin's figure). I am afraid there are many individual differences.

The window of enlightenment --- Varin's figure --- Peripheral drift illusion@


*an imaginary insect

Rings appear to tilt in the depth direction.

Copyright Akiyoshi.Kitaoka 2005 (February 13)

Igaigamushi shows rotational illusion.


It looks like snow falling down to the right. In addition, gray circles appear to be of two different levels of lightness but they are identical in lightness.

Copyright A.Kitaoka 2002

*a kind of Japanese cake

It looks like yokans by fusing the figure. This is a kind of Necker cube with transparency and binocular stereopsis.

Copyright A.Kitaoka 1997


It looks like cakes by fusing the figure.

Copyright A.Kitaoka 1997


Switching of stereo match and binocular rivalry occur.

Copyright A.Kitaoka 2002

"Inaiinai baa"*

Incomplete correspondence can generate stereopsis, accompanied by transparency.

Copyright A.Kitaoka 2002


Ellipses that incline in depth appear. In addition, the central circle appears to be shorter in height than the flanks.

Copyright A.Kitaoka 2002

"Absorbent mesh"

The depth of the mesh tends to be flush with the depth of the circle at which observers fixate.

Copyright A.Kitaoka 2002


It looks like a potatochip.

Copyright A.Kitaoka 1997

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