August 2010
Volume 10, Issue 7
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2010
Phase-Independent Contrast Combination in Binocular Vision
Author Affiliations
  • Jiawei Zhou
    Vision Research Lab, School of Life Science, USTC, Hefei, P.R.China
  • Chang-Bing Huang
    Laboratory of Brain Processes (LOBES), Departments of Psychology, University of Southern California, Los Angeles, USA
  • Zhong-Lin Lu
    Laboratory of Brain Processes (LOBES), Departments of Psychology, University of Southern California, Los Angeles, USA
  • Yifeng Zhou
    Vision Research Lab, School of Life Science, USTC, Hefei, P.R.China
Journal of Vision August 2010, Vol.10, 328. doi:10.1167/10.7.328
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      Jiawei Zhou, Chang-Bing Huang, Zhong-Lin Lu, Yifeng Zhou; Phase-Independent Contrast Combination in Binocular Vision. Journal of Vision 2010;10(7):328. doi: 10.1167/10.7.328.

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

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Abstract

How the visual system combines information from the two eyes to form a unitary binocular representation of the external world is a fundamental question in vision science that has been the focus of many psychophysical and physiological investigations. Ding and Sperling (2006) measured the perceived phase of the cyclopean image as a function of the contrast ratio between two monocular sinewave gratings of the same spatial frequency but different phases, and developed a binocular combination model in which each eye exerts gain control on the other eye's signal and over the other eye's gain control. Critically, the relative phase of the two sinewaves plays a central role. We used the Ding-Sperling paradigm but measured both the perceived contrast and phase of cyclopean images in seventy-two combinations of base contrast, interocular contrast ratios, eye origin of the probe, and relative phase. We found that the perceived contrast of cyclopean images was independent of the relative phase of the monocular sinewave gratings, although the perceived phase of cyclopean images depended on the relative phase and contrast ratio of the monocular images. We modified the Ding-Sperling binocular combination model in two ways: (1) phase and contrast of the cyclopean images are computed in separate pathways, although with shared cross-eye contrast-gain control; and (2) phase-independent local energy from the two monocular images are used in contrast combination, after additional within-eye contrast gain-control. With five free parameters, the model yielded an excellent account of data from all the experimental conditions.

Zhou, J. Huang, C.-B. Lu, Z.-L. Zhou, Y. (2010). Phase-Independent Contrast Combination in Binocular Vision [Abstract]. Journal of Vision, 10(7):328, 328a, http://www.journalofvision.org/content/10/7/328, doi:10.1167/10.7.328. [CrossRef]
Footnotes
 Supported by NEI, NSF of China.
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