December 2010
Volume 10, Issue 15
Free
OSA Fall Vision Meeting Abstract  |   December 2010
Influence of rods on hue scaling of surface color
Author Affiliations
  • Roger Knight
    Department of Psychology, University of Wisconsin-Whitewater, Whitewater, WI, USA
  • Pat Estes
    Department of Psychology, University of Wisconsin-Whitewater, Whitewater, WI, USA
  • Ann Grob
    Department of Psychology, University of Wisconsin-Whitewater, Whitewater, WI, USA
  • Brent Leable
    Department of Psychology, University of Wisconsin-Whitewater, Whitewater, WI, USA
  • Alexandra Muscato
    Department of Psychology, University of Wisconsin-Whitewater, Whitewater, WI, USA
Journal of Vision December 2010, Vol.10, 46. doi:10.1167/10.15.46
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      Roger Knight, Pat Estes, Ann Grob, Brent Leable, Alexandra Muscato; Influence of rods on hue scaling of surface color. Journal of Vision 2010;10(15):46. doi: 10.1167/10.15.46.

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Abstract

Rods produce a variety of different effects on hue perception at dim light levels that stimulate both rod and cone photoreceptors. Current understanding of these effects is primarily based on research comparing color appearance of spectral lights across adaptation conditions that either maximize (dark-adapted) or minimize (cone plateau) the contribution of rod signals to vision (Buck, 2004). In this study, we ask whether the types of rod influence previously reported for lights generalize to colored surfaces during free viewing. Observers used a hue scaling procedure (Gordon, Abramov, & Chan, 1994) to judge the color appearance of sixty Munsell color chips selected from the Munsell 4-, 6-, and 8-value planes with luminance ranging from 4 to 0.01 cd m-2. For each plane, rod influence was measured by comparing hue judgments made after dark adaptation with those made during the cone plateau. At mesopic light levels, our results are qualitatively consistent with previous studies showing effects on green and blue hue sensations. A significant rod influence was found for some, but not all, colors represented by the Munsell hue circle. The largest rod influence was observed for green hue sensations with a green hue bias for chips 5YR to 10GY. A smaller blue hue bias was observed for 5G to 5B and no rod influence was observed between 10B to 10R. Our results suggest that during natural viewing the influence of rods on surface color appearance is to primarily affect green, and to a lesser extent, blue hue sensations.

Acknowledgments
This research is supported by Grant-in-Aid for Challenging Exploratory Research of Japan Society for the Promotion of Science No.22650054. 
References
Buck, S. L.(2004). Rod-cone interactions in human vision. In L. M. Chalupa, & J. S. Werner (Eds.). The visual neurosciences (vol. 1, pp. 863–878). Cambridge, MA: MIT Press.
Gordon, J., Abramov, I., Chan, H.(1994). Describing color appearance: Hue and saturation scaling. Perception & Psychophysics, 56(1), 27–41.
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