Color perception through atmospheric haze.
The radiance of most objects seen at a distance through the atmosphere is dominated by scattered light of a blue hue that should make the landscape appear predominately blue. However, common experience shows that people can see colors at a distance. A possible explanation of this paradox is that the visual system splits the light into a haze layer and the background landscape. A straightforward mathematical description of this splitting explains the results of a color matching study in the Great Smoky Mountains National Park. In this study, hues of objects seen through haze were found to be constant with changes in optical depth while colorfulness decreased exponentially.
Henry
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Department of Civil Engineering, University of Southern California, Los Angeles 90089-2531, USA.
Mahadev
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Urquijo
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Chitwood
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D001272:Atmosphere; D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D012542:Scattering, Radiation