Classic geometrical illusion 19
since March 2, 2013
"Superellipse"
The circle appears to be a superellipse.
Copyright Akiyoshi Kitaoka 2015 (June 30)
"Superellipses"
Concentric circles appears to be distorted.
Copyright Akiyoshi Kitaoka 2015 (June 30)
"Patch Gourd illusion"
A square appears to be distorted toward an attached small square.
Copyright Akiyoshi Kitaoka 2015 (February 14)
"Patch Gourd illusion 2"
A square also appears to be distorted like "Patch Gourd illusion" when a small square is attached inside.
Copyright Akiyoshi Kitaoka 2015 (February 14)
"Café Wall illusion in an octagon"
Each side appears to tilt clockwise.
Copyright Akiyoshi Kitaoka 2014 (January 17)
"Snake skins"
The uppermost horizontal row appears to tilt clockwise and the others appear to tilt alternately. This apparent tilt depends on the Zöllner illusion and the Café Wall illusion.
Copyright Akiyoshi Kitaoka 2014 (December 28)
"Tilting corridors illusion"
The upper left and lower right blocks of squares appear to tilt clockwise whereas the othet two counterclockwise, but they are vertically and horizontally aligned.
(Zöllner illusion)
Copyright Akiyoshi Kitaoka 2014 (December 20)
"Shaking train"
Vertically and horizontally aligned squares appear to tilt clockwise or
counterclockwise alternately.
(Zöllner illusion)
Copyright Akiyoshi Kitaoka 2014 (December 20)
"Two-storied subways"
The upper left and lower right blocks of gray squares appear to tilt clockwise
whereas the other two counterclockwise, but they are vertically and horizontally
aligned.
(Café Wall illusion)
Copyright Akiyoshi Kitaoka 2014 (December 20)
"Subways"
The left block of gray squares appear to tilt clockwise whereas the right
one counterclockwise, but they are vertically and horizontally aligned.
(Café Wall illusion)
Copyright Akiyoshi Kitaoka 2014 (December 20)
"Kitaoka size illusion"
The original idea was that a person standing close to a thick tree appears to be thinner while the person standing close to a thin tree appears to be thicker. It does not seem that this idea is supported. Or there might be a reversal.
Copyright Akiyoshi Kitaoka 2014 (June 2)
"Basic image (?) of the Kitaoka size illusion"
The left rectangle close to a thin bar appear to be taller and thinner than the right one close to a large rectangle, though they are the same shape and size.
Copyright Akiyoshi Kitaoka 2014 (June 3)
"Lavender field"
This image consists of squares, but several sides appear to be curved.
Copyright Akiyoshi Kitaoka 2014 (May 17)
The original image was produced in 1999
"Multieyes"
This image consists of squares, but several sides appear to be curved.
Copyright Akiyoshi Kitaoka 2014 (May 17)
The original image was produced in 1997 or 1998
"Face"
This image consists of squares, but several sides appear to be curved.
Copyright Akiyoshi Kitaoka 2014 (May 17)
The original image was produced in 1997 or 1998
"Face 2"
This image consists of squares, but several sides appear to be curved.
Copyright Akiyoshi Kitaoka 2014 (May 17)
The original image was produced in 1997 or 1998
"Octagonal falls"
All edges toward the center just pass the center but they does not appear to do so.
Copyright Akiyoshi Kitaoka 2014 (May 11)
"Length illusion in Fraser illusion images"
The distance between the leftmost black diamond and the rightmost one of the right image appears to be longer than that of the left image, though they are the same length.
Copyright Akiyoshi Kitaoka 2014 (March 14)
"Conversion between the Café Wall illusion and the reverse
Café Wall illusion"
A Café Wall illusion image is converted to a reverse Café Wall illusion image when blurred (Gaussian) while a reverse Café Wall illusion image is converted to a Café Wall illusion image when blurred!
Copyright Akiyoshi Kitaoka 2013 (September 28)
"Okazaemon tilt illusion"
Crosses appear to tilt.
Copyright Akiyoshi Kitaoka 2013 (September 16)
"Moving Zöllner illusion"
Each row appears to tilt alternately (the uppermost one counterclockwise), though they are horizontally aligned. Each row appears to move slightly.
Discovered by Akiyoshi Kitaoka 2013 (July 7)
"Wood"
Trees are placed horizontally but each other row appears to tilt alternately (Fraser illusion).
Discovered by Akiyoshi Kitaoka 2013 (May 27)
"Sleepy boy"
The four red dots are placed at the angles of a virtual rectangle, but they appear to form a trapezoid.
Discovered by Akiyoshi Kitaoka 2013 (March 2)
"A person looking upward and a person looking downward"
Each dot is located at the middle point between the apex and the bottom line of the surrounding triangle, but the dot appears to be closer to the apex. This demosntration way of the Müller-Lyer illusion is already known.
Discovered by Akiyoshi Kitaoka 2013 (March 2)
Classic geometrical illusion 18
Classic geometrical illusion 17
Classic geometrical illusion 16
Classic geometrical illusion 15
Classic geometrical illusion 14
Classic geometrical illusion 13
Classic geometrical illusion 12
Classic geometrical illusion 11
Classic geometrical illusion 10
Classic geometrical illusion 9
Classic geometrical illusion 8
Classic geometrical illusion 7
Classic geometrical illusion 6
Classic geometrical illusion 5
Classic geometrical illusion 4
Classic geometrical illusion 3
Classic geometrical illusion 2
Classic geometrical illusion 1