Color constancy3

since December 21, 2014


"Illusory red with additive color change"

There appear to be illusory red though this image consists of pixels of cyan hue.

Copyright Akiyoshi Kitaoka 2015 (Janyary 16)


"Illusory red with two-color method"

There appear to be illusory red though this image consists of pixels of cyan hue.

Copyright Akiyoshi Kitaoka 2015 (Janyary 16)




Original



"Illusory yellow in a color checker"

These photos consist of pixels of blue hue, but some color squares or cards appear to be yellowish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 11)


"Illusory light blue in a color checker"

These photos consist of pixels of red hue, but some color squares or cards appear to be bluish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 11)



The original photo



"Illusury light blue"

These photos consist of pixels of red hue, but lines of a train car and a signboard appear to be bluish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)



The original photo



"Illusury blue"

These photos consist of pixels of yellow hue, but the backgrounds of "P" or "中華街" (China Town) appear to be bluish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)




The original photo



"Illusury pink"

These photos consist of pixels of green hue, but lotus petals appear to be reddish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)




The original photo



"Illusury yellow"

These photos consist of pixels of blue hue, but sunflower petals appear to be yellowish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)




The original photo



"Illusury green"

These photos consist of pixels of magenta (light red-purple) hue, but the two telephones placed in front of a vending machine appear to be greenish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)




The original photo



"Illusury red"

These photos consist of pixels of cyan hue, but the tram appears to be reddish.

Copyright Akiyoshi Kitaoka 2015 (Janyary 10)




The original photo


"Serbian tram with Land's two-color method 2"

The tram appears to be slightly bluish, though the image consists of reddish hue.

Copyright Akiyoshi Kitaoka 2015 (Janyary 5)


"Serbian tram with additive color change"

The tram appears to be slightly bluish, though the image consists of red hue.

Copyright Akiyoshi Kitaoka 2015 (Janyary 5)



Original color


"Serbian tram with Land's two-color method"

The tram appears to be slightly bluish, though the image consists of reddish hue.

Copyright Akiyoshi Kitaoka 2014 (December 30)


The original image


Additive color change: The tram appears to be bluish, though it is not blue but nearly-gray reddish color.

Copyright Akiyoshi Kitaoka 2014 (December 30)


"Color contrast illusion with Land's two-color method"

The images except the original image consist of reddish colors and gray, but some blocks appear to be bluish.

"Land's two-color method" by Ichiro Kuriki on Feb.26, 2002
http://www.vision.riec.tohoku.ac.jp/ikuriki/Land_two_color/Land_two_color-j.html

Copyright Akiyoshi Kitaoka 2014 (December 30)


"Color contrast illusion with Land's two-color method 2"

The images except the original image consist of cyan colors and gray, but some blocks appear to be reddish.


"Apparent light blue is actually reddish"

Copyright Akiyoshi Kitaoka 2014 (December 29)



(Original image)



"Apparent light blue is actually nearly-gray reddish"

Copyright Akiyoshi Kitaoka 2014 (December 29)



The right eye appears to be reddish though it is the same greenish blue as the left eye.

Copyright Akiyoshi Kitaoka 2014 (December 29)


The right eye appears to be slightly bluish though it is the same gray as the left eye.

Copyright Akiyoshi Kitaoka 2014 (December 29)


before


after


"Inverse transformation of an additively-color-filtered image using a new program"

Copyright Akiyoshi Kitaoka 2014 (December 21)


Kitaoka, A. (2011). A variety of color illusion: (2) Color constancy and two types of color filters. Journal of the Color Science Association of Japan, 35(3), 234-236 (in Japanese).


Color constancy 2

Color constancy 1


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