December 2003
Volume 3, Issue 12
Free
OSA Fall Vision Meeting Abstract  |   December 2003
Individual differences in hue scaling
Author Affiliations
  • Gokhan Malkoc
    University of Nevada, Reno, USA
  • Paul Kay
    U.C. Berkeley, International Computer Science Institute, USA
  • Michael A. Webster
    University of Nevada, USA
Journal of Vision December 2003, Vol.3, 34. doi:10.1167/3.12.34
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      Gokhan Malkoc, Paul Kay, Michael A. Webster; Individual differences in hue scaling. Journal of Vision 2003;3(12):34. doi: 10.1167/3.12.34.

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Abstract

Observers differ in the stimuli they choose for unique hues (i.e. pure red, green, blue, and yellow) or binary hues (e.g. orange, purple, yellow-green, and blue-green). Yet there is little correlation between these choices, suggesting that different color categories are influenced by largely independent factors (Malkoc et al., JOV 2002). We examined variations in color appearance both within and between color categories, by sampling finer gradations of color with a hue scaling task. Stimuli were 24 equiluminant hues of moderate contrast spaced in 15-deg steps along a circle within the LM and S chromatic plane, and were shown in a 2-deg field centered in a gray background on a monitor. 59 subjects rated the hue of each stimulus by pressing buttons to indicate the perceived proportion of red, green, blue, or yellow. In a separate task they also chose a unique or binary label for each stimulus. Settings for nearby stimuli were strongly positively correlated while more independent for distant angles. These local correlations were centered near the poles of the LM and S cone-opponent axes, as revealed by a factor analysis of the settings, but are not predicted by scaling differences in the cone-opponent or unique-hue axes. The lack of a global influence on hue scaling confirms the relative independence of different color categories, and suggests that variations in both unique and binary hues may reflect qualitatively different clusters that cannot be related by a simple metrical color space.

MalkocG.KayP.WebsterM.A.(2002). Individual differences in color categories. Journal of Vision, 2(7), 144.

Malkoc, G., Kay, P., Webster, M. A.(2003). Individual differences in hue scaling [Abstract]. Journal of Vision, 3( 12): 34, 34a, http://journalofvision.org/3/12/34/, doi:10.1167/3.12.34. [CrossRef]
Footnotes
 Supported by EY-10834
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