Illusion of lightness #8
since May 8, 2005
"Dark disk and light disk"
The right disk appears brighter than the left one, though they are the same luminance gradient.
Copyright Akiyoshi Kitaoka 2024 (June 21)
The effect is weak in this case.
"Checker shadow illusion"
A = B, but A appears to be darker than B (checker shadow illusion). The effect is weak in the upper image.
Copyright Akiyoshi Kitaoka 2024 (June 8)
"Light of chrysanthemums"
The center of a flower appears to be bright.
Copyright Aiyoshi Kitaoka 2005 (April 5); remade May 8, 2024