Color illusion 19

Since June 2, 2020


"Goldfish"

There appear to be red-purple and orange goldfish, though they are the same color. There appear to be bluish and greenish goldfish, though they are the same color.

Copyright Akiyoshi Kitaoka 2020 (June 13)


"Squares of the Kanematsu-Koida illusion"

Gray contour squares appear to be reddish.

Copyright Akiyoshi Kitaoka 2019 (December 4) (updated June 2, 2020)

Reference

Tama Kanematsu, Kowa Koida, "Hyper color contrast illusion (HCC), large enhancement of simultaneous color contrast by bordering white line", THE 24TH SYMPOSIUM OF THE INTERNATIONAL COLOUR VISION SOCIETY (ICVS2017), Erlangen, Germany, August 18-22, http://icvs2017.fau.de 他

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