December 2002
Volume 2, Issue 10
OSA Fall Vision Meeting Abstract  |   December 2002
Independent chromatic and luminance mechanisms for stereo depth?
Author Affiliations
  • John Krauskopf
    Center for Neural Science, New York University, New York, NY, USA
  • Jason Forte
    Department of Physiology, University of Sydney, Sydney, NSW, Australia
Journal of Vision December 2002, Vol.2, 70. doi:
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      John Krauskopf, Jason Forte; Independent chromatic and luminance mechanisms for stereo depth?. Journal of Vision 2002;2(10):70.

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      © ARVO (1962-2015); The Authors (2016-present)

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Stereo depth thresholds are much higher for stimuli modulated chromatically than they are for stimuli modulated in luminance. It has been suggested that there are independent mechanisms that mediate stereo judgments for the two classes of stimuli. We have tested this theory test by measuring stereoscopic disparity thresholds for luminance modulated targets presented alone, and combined with a chromatic component. This sort of mixture experiment is often hard to interpret but in this case the predicted outcome is simple. If there are independent stereo detection systems, threshold offset for the mixture should be equal to or better than that for the pure luminance stimulus. Thresholds were higher for the mixtures. The results clearly disagree with the independent mechanism hypothesis.

Krauskopf, J., Forte, J.(2002). Independent chromatic and luminance mechanisms for stereo depth? [Abstract]. Journal of Vision, 2( 10): 70, 70a,, doi:10.1167/2.10.70. [CrossRef]

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