Color constancy8

since December 19, 2020



"Yellow vs. black eyes"

The eye in the left face appears yellow while that in the right face appear blackish, though they are the same color (R128, G128, B128).

Copyright Akiyoshi Kitaoka 2024 (March 29)

Correction of image (May 1, 2024)


Do you see the strawberries as red?

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) September 16, 2023


"Illusory reddish coke can"

The can appears to be reddish, though the color consists of black and white.

Copyright Akiyoshi Kitaoka 2021 (October 13)




北岡明佳 (2021) 「新しい並置混色による錯視とVRへの応用」 (2021年9月12日(日)10:30-11:50・第26回日本バーチャルリアリティ学会大会(立命館大学・オンライン)・基調講演1) Presentation (html)


Copyright Akiyoshi Kitaoka 2022 (August 19)


"Illusory red tulips"

These apparent red tulips are gray or nearly gray of cyan. In addition, those aparent yellow tulips are green, and the white ones are cyan.

Copyright Akiyoshi Kitaoka 2022 (August 16)




Copyright Akiyoshi Kitaoka 2022 (April 14)



"Illusory white and black"

The apparent white piece in the left image is the same color as the apparent blue piece in the right image. Moreover, the apparent yellow piece in the left image is the same color as the apparent black piece in the right image.

Copyright Akiyoshi Kitaoka 2021 (September 26)


From the top: the original image, an image transformed with additive color change, and an image transformed with the two-color method

Copyright Akiyoshi Kitaoka 2021 (December, 7)


"Illusory blue"

The car appears to be bluish, though the pixels are nott.

Copyright Akiyoshi Kitaoka 2021 (June 22)


"Illusory yellowish petals"

Petals appear to be yellowish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2021 (June 12)



(an expanded image around a lower-left part)


"Illusory reddish strawberries"

Strawberries appear to be reddish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2021 (June 12)



(an expanded image around the tip of the lower-left strawberry)


"Illusory bluish strawberries"

Strawberries appear to be bluish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2021 (June 12)



(an expanded image around the tip of the lower-left strawberry)


"Blue strawberry illusion"

Strawberries appear to be bluish, though the pixels are not.

Copyright Akiyoshi Kitaoka 2020 (December 19)


Color constancy 7

Color constancy 6

Color constancy 5

Color constancy 4

Color constancy 3

Color constancy 2

Color constancy 1


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