Color illusion 22

Since January 30, 2022





Copyright Akiyoshi Kitaoka 2022 (February 18)

http://www.psy.ritsumei.ac.jp/~akitaoka/JavaScript-DKL01.html






Copyright Akiyoshi Kitaoka 2022 (February 18)


A CIE xy chromaticity diagram showing isolumoinant colors: Y = 0.075 ± 0.005 (the uppermost), Y = 0.300 ± 0.005 (the second), Y = 0.500 ± 0.005 (the third), Y = 0.800 ± 0.005 (the lowermost)

Copyright Akiyoshi Kitaoka 2022 (February 19)

http://www.psy.ritsumei.ac.jp/~akitaoka/JavaScript-equiluminance01.html


Copyright Akiyoshi Kitaoka 2022 (February 19)




Copyright Akiyoshi Kitaoka 2022 (February 19)



Equiluminant colors plotted on CIE xy chromaticity diagrams pic.twitter.com/7XpPRzcTDS

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) February 19, 2022

Colors of my diplay (EIZO FlexScan EQ2730V)

Copyright Akiyoshi Kitaoka 2022 (February 18)


Copyright Akiyoshi Kitaoka 2022 (February 17)


Do you see illusory red?

— Akiyoshi Kitaoka (@AkiyoshiKitaoka) February 15, 2022

a web program to put the colors of an image onto the CIE xy chromaticity diagram

http://www.psy.ritsumei.ac.jp/~akitaoka/JavaScript-CIExy03.html

Copyright Akiyoshi Kitaoka 2022 (February 2, 17)


L*a*b*


CIE xy chromaticity diagram of sRGB

Copyright Akiyoshi Kitaoka 2022 (February 3, 17)

L*a*b*


DKL space


LMS


Copyright Akiyoshi Kitaoka 2022 (February 3)


An image to show additive color mixture using color assimilation

Copyright Akiyoshi Kitaoka 2022 (February 1)


An image to show subtractive color mixture using color assimilation


color illusion with temporal color mixture
"Black and white make red"

Copyright Akiyoshi Kitaoka 2022 (January 30)

http://www.psy.ritsumei.ac.jp/~akitaoka/JavaScript-tempora_color_mixture03.html


"Black and white make green"


"Black and white make blue"


"Black and white make cyan"


"Black and white make magenta"


"Black and white make yellow"


The movies above

temporal_color_mixture-illusory_red01.mp4

temporal_color_mixture-illusory_green01.mp4

temporal_color_mixture-illusory_blue01.mp4

temporal_color_mixture-illusory_cyan01.mp4

temporal_color_mixture-illusory_magenta01.mp4

temporal_color_mixture-illusory_yellow01.mp4


"Illusory yellow"

The can with bear faces appears to be yellowish, though the colors of the pixels are green.

Copyright Akiyoshi Kitaoka 2022 (January 27)

cf.


Color illusion 21

Color illusion 20

Color illusion 19

Color illusion 18

Color illusion 17

Color illusion 16

Color illusion 15

Color illusion 14

Color illusion 13

Color illusion 12

Color illusion 11

Color illusion 10

Color illusion 9

Color illusion 8

Color illusion 7

Color illusion 6

Color illusion 5

Color illusion 4

Color illusion 3

Color illusion 2

Color illusion


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