Illusions observed outdoors #6

since October 26, 2012

"Moving cars illusion"

Cars appear to move forward or backward.

Copyright Akiyoshi Kitaoka 2016 (March 5)

"Snowy valley illusion"

A hole in rock appears to be snow.

Copyright Akiyoshi Kitaoka 2014 (April 4)

viewed from the front

viewed from the right

viewed from the left

"The Bathtub illusion demo using 'Rotating Hell'"

The shape of the box appears to be different depending on the viewing point.

Copyright Akiyoshi Kitaoka 2014 (July 26)

Bathtub illusion: "Stretching out in the tub" proposed by Lydia Maniatis, American University, USA in the Best Illusion of the Year Contest 2010.

"Overestimation of mirrored images on the surface of water"

Mirrored images on the surface of water appears to be taller than the original ones.

Copyright Akiyoshi Kitaoka 2013 (December 21)
photo August 27, 2013 Bremen, Germany 

Actually, the mirrord images are slightly shorter than the original ones.

Waves or distortion on the surface of water does not give a critical effect of overestimation.

Fakes also work. (@Okazaki, Japan)

Copyright Akiyoshi Kitaoka 2013 (December 21)

< Mirrored images are shorter in height than the originals. >

Copyright Akiyoshi Kitaoka 2013 (December 23)
Law of sines gives:

ho / sin (θo) = l / sin (α)
ho / sin (θm) = l / sin (β)

sin (θo) - sin (θm) = ho (sin (α) - sin (β)) / l > 0 because (α > β) and (0 <α,β < π/2)

Therefore, θo > θm

"A feeding passerby"


Copyright Akiyoshi Kitaoka 2013 (December 21)
photo August 28, 2013 Bremen, Germany 

"Mountain extinction illusion"

The top of a mountain appears to extinguish.

Copyright Akiyoshi Kitaoka 2013 (September 27)
photo September 27, 2013; Mt. Tokachi-dake viewed from Kamifurano Town 

"Sapporo Yomiuri Building tilt illusion"

Horizontal lines appear to tilt alternately.

Copyright Akiyoshi Kitaoka 2013 (September 30)
photo September 30, 2013; Sapporo, Japan

checkered illusion

REMM hotel, Yurakucho, Tokyo

Copyright Akiyoshi Kitaoka 2013 (November 3)
photo November 3, 2013; Yurakucho, Tokyo

"Electric wires"

The upper-left electric wires appear to be distant from the viewing point, but they are actually close as shown below.

Copyright Akiyoshi Kitaoka 2013 (August 1)
photo July 31, 2013 @Yoshino river, Toyonaga, Ohtoyo-cho, Kochi-prefecture 

"A man (upper) and a chimpanzee (lower) viewed from the Tanegashima Space Center"

Large image

photo by Seiichi Tsuinashi 2013 (February 3)

Tanegashima Space Center
photo by Seiichi Tsuinashi 2013 (February 3)

The main rocket launching site

"Vladivostok face"


captured Akiyoshi Kitaoka 2013 (January 10)

"Tail-wagging komainu"*

*komainu = one of a pair of guardian lions placed at the gate of a shrine

The left komainu appears to wag its tail.

Copyright Akiyoshi Kitaoka 2012 (October 26)

Photo taken in Miyajima, Hiroshima-prefecture, Japan

Night view of the Itsujushima shrine (November 25, 2012)

Thanks to Y

"Mountain transparency illusion"

Mountains appear to be transparent.

Copyright Akiyoshi Kitaoka 2012 (October 25)

Illusions observed outdoors 5

Illusions observed outdoors 4

Illusions observed outdoors 3

Illusions observed outdoors 2

Illusions observed outdoors 1

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