June 2007
Volume 7, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   June 2007
Relative depth from pattern disparities and from component disparities
Author Affiliations
  • Bart Farell
    Institute for Sensory Research, Syracuse University, NY, US
  • Yu-Chin Chai
    Institute for Sensory Research, Syracuse University, NY, US
Journal of Vision June 2007, Vol.7, 821. doi:10.1167/7.9.821
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Bart Farell, Yu-Chin Chai; Relative depth from pattern disparities and from component disparities. Journal of Vision 2007;7(9):821. doi: 10.1167/7.9.821.

      Download citation file:


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

      ×
  • Supplements
Abstract

Two simultaneously presented stimuli might appear at the same depth even though their disparities are very different. This happens when the two stimuli have very different orientations (Farell, J. Neurosci. 2006). Even for two-dimensional patterns that have no perceptually dominant orientation, the relative orientation of the patterns' Fourier components can affect the perceived stereo depth separation between the patterns (Chai & Farell, VSS2006). Thus component disparities carry relative depth signals.

Is the perceived depth of two-dimensional patterns determined only by independent component disparities? To answer this question, we examined perceived depth matches between a sinusoidal grating and a plaid made of two superimposed sinusoids. We varied the orientation of the grating relative to the orientation of the plaid's components and we varied the orientation of the grating relative to the disparity direction of the plaid as a whole.

The plaid was confined to an annular envelope and the grating probe was presented as a Gabor patch in the center of the annulus. The disparity of the plaid was fixed while the disparity of the grating varied across trials while the observer judged the grating as ‘near’ or ‘far’ relative to the plaid. We then determined the relative-depth PSE. If the grating had the same orientation as a plaid component, our observers perceived a depth match when the grating and the component had the same disparity. There was no independent effect of the plaid's disparity magnitude or its disparity direction on the depth match. However, if the grating differed in orientation from both plaid components, our observers perceived a match when the grating and the plaid had the same disparity magnitude and disparity direction. This result shows that two-dimensional pattern disparities are functionally distinct from component disparities and that both disparities support relative depth percepts.

Farell, B. Chai, Y.-C. (2007). Relative depth from pattern disparities and from component disparities [Abstract]. Journal of Vision, 7(9):821, 821a, http://journalofvision.org/7/9/821/, doi:10.1167/7.9.821. [CrossRef]
Footnotes
 NIH Grant EY 012286
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×