Color illusion 19

Color illusion 19

Since June 2, 2020

Spatial color mixture: additive color mixture based upon RGB (red, green, and blue)

Spatial color mixture: subtractive color mixture based upon CMY (cyan, magenta, and yellow)

Spatial color mixture: additive color mixture based upon CMY (cyan, magenta, and yellow)

Spatial color mixture: subtractive color mixture based upon RGB (red, green, and blue)

Additive color mixture based upon RGB (red, green, and blue)

Subtractive color mixture based upon CMY (cyan, magenta, and yellow)

https://www.facebook.com/akiyoshi.kitaoka/posts/10220880852025844

Spatial color mixture: additive color mixture based upon RGB (red, green, and blue)

Spatial color mixture: subtractive color mixture based upon CMY (cyan, magenta, and yellow)

Spatial color mixture: additive color mixture based upon CMY (cyan, magenta, and yellow)

Spatial color mixture: subtractive color mixture based upon RGB (red, green, and blue)

Combined

The original photo

Temporal color mixture (field sequential): additive color mixture based upon RGB (red, green, and blue)

Temporal color mixture (field sequential): Subtractive color mixture based upon CMY (cyan, magenta, and yellow)

↓

cf. spatial color mixture

↓

chromatic dungeon illusion

https://jov.arvojournals.org/article.aspx?articleid=2158191

The apparent two-tone is
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) April 21, 2021

その他の方はリプ欄に！！！
— あんまん (@anman0510) April 20, 2021

"Temporal color mixture: additive color mixture vs. subtractive one"

(simplified version)

"Histogram compression and histogram equalization"

Shapiro, A., Hedjar, L., Dixon, E., and Kitaoka, A. (2018). Kitaoka's tomato: Two simple explanations based on information in the stimulus. i-Perception, 9(1), January-February, 1-9. PDF (open access)

"Squares of the Kanematsu-Koida illusion"

Gray contour squares appear to be reddish.

Reference

https://www.nature.com/articles/s41598-020-77241-5

https://www.youtube.com/watch?v=O2NwqHksQWI&feature=youtu.be

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

Web

"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.