Title |
The Constancy of Colored After-Images
|
---|---|
Published in |
Frontiers in Human Neuroscience, May 2017
|
DOI | 10.3389/fnhum.2017.00229 |
Pubmed ID | |
Authors |
Semir Zeki, Samuel Cheadle, Joshua Pepper, Dimitris Mylonas |
Abstract |
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 it does not. The after-image, just like the color itself, depends on the ratio of light of different wavebands reflected from it and its surrounds. 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. |
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