RT Journal Article
SR Electronic
T1 The Constancy of Colored After-Images
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 095935
DO 10.1101/095935
A1 Semir Zeki
A1 Samuel Cheadle
A1 Joshua Pepper
A1 Dimitris Mylonas
YR 2016
UL http://biorxiv.org/content/early/2016/12/21/095935.abstract
AB We undertook psychophysical experiments to determine whether the color of the after-image produced by viewing a colored patch which is part of a complex multi-colored scene depends on the wavelength-energy composition of the light reflected from that patch. Our results show that, just as the color of a patch which is part of a complex scene is independent of the wavelength-energy composition of the light coming from it alone, but depends as well on the wavelength-energy composition of the light coming from its surrounds, so is the color of its after-image. Hence, traditional accounts of after-images as being the result of retinal adaptation or the perceptual result of physiological opponency, are inadequate. We propose instead that the color of after-images is generated after colors themselves are generated in the visual brain.