Color illusion V
Since January 8, 2006
"Blue and green ginkgos"
There appear to be blue hearts and green ones, though they are identical in color (both are cyan).
Copyright Akiyoshi .Kitaoka 2007 (January 12)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Valentine gift"
There appear to be pink hearts and orange ones, though they are identical in color (both are pale red).
Copyright Akiyoshi .Kitaoka 2007 (January 12)
In Japan, Valentine's Day is a day when girls give chocolate to boys. I do not know what made such a funny custom. On the other hand, the day when the happy boys give gifts back to the girls is called White Day (March 14). For boys who fail to get chocolate, Valentine's Day is the worst day in their life.
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Yellow and blue hearts"
Gray hearts appear to be yellow or blue.
Copyright Akiyoshi .Kitaoka 2007 (January 12)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Moth eggs"
White eggs appear to be tinted.
Copyright Akiyoshi .Kitaoka 2007 (January 12)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Yellow and white hearts"
There appear to be yellow hearts and white ones, though they are identical in color (both are yellow).
Copyright Akiyoshi .Kitaoka 2007 (January 10)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Patchwork of hearts 2"
There appear to be orange hearts and light-pink ones, though they are identical in color.
Copyright Akiyoshi .Kitaoka 2007 (January 10)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Carpet of blue and green hearts (Parts)"
There appear to be blue and green hearts, though they are identical in color.
Copyright Akiyoshi .Kitaoka 2007 (January 10)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Patchwork of hearts"
There appear to be orange hearts and purple-red ones, though they are identical in color.
Copyright Akiyoshi .Kitaoka 2007 (January 10)
cf. Dungeon illusion: Bressan, P. (2001) Explaining lightness illusions. Perception, 30, 1031-1046.
"Sea spirals"
There are four white spirals, but two of them appear to be different in color from the rest.
Copyright Akiyoshi .Kitaoka 2007 (January 8)
"Blue and yellow spirals: Day and Night"
The blue and yellow spirals in the left half appear to be vivid while those in the right half appear to be dull.
Copyright Akiyoshi .Kitaoka 2007 (January 8)
"Sticking plasters"
The central square in the left half appears to be vivid in color than the one in the right half, but they are identical physically.
Copyright Akiyoshi .Kitaoka 2007 (January 8)