Scale selection for second-order (non-linear) stereopsis

Vision Research
L M Wilcox, R F Hess

Abstract

In addition to the conventional luminance spatial frequency-dependent, disparity processing mode, there is a second-order luminance spatial frequency-independent type of processing available to the stereoscopic system. Here we use gaussian-enveloped, amplitude-modulated grating patches to determine how the stereoscopic system responds to the presence of two sources of second-order disparity information at different scales when there is no disparity information available via the conventional luminance-based system. In the first experiment we show that the stereoscopic system uses the disparity signal provided by the stimulus envelope, even though it is at a coarser scale than that provided by the amplitude modulation (AM). We then demonstrate that if the stimulus envelope is degraded via blurring, or if it is fixed at zero disparity, then performance depends on the finer-scale AM disparity signal. To show that the stereoscopic system uses the disparity signal provided by the AM we extend the carrier grating outside the borders of the AM stimulus, thereby making the boundary of the patch less discernible. Results obtained using this stimulus suggest that when two sources of second-order disparity information are present within th...Continue Reading

References

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Citations

Jan 31, 2014·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Mark A Georgeson, Stuart A Wallis
Jul 31, 2013·Vision Research·Deborah GiaschiLaurie M Wilcox
May 2, 2000·Vision Research·M Edwards, C M Schor
Jun 15, 1999·Vision Research·K LangleyP B Hibbard
Jun 15, 1999·Vision Research·L M Wilcox
Sep 23, 2000·Vision Research·R S AllisonX Fang
Mar 30, 2000·Vision Research·S J Prince, R A Eagle
Mar 30, 2000·Vision Research·S L McCollR F Hess
Mar 18, 2000·Vision Research·S J Prince, R A Eagle
Nov 4, 2000·Vision Research·R F HessS Dakin
Apr 15, 2008·Vision Research·Robert F Hess, Laurie M Wilcox
Jun 13, 2009·Vision Research·Laurie M Wilcox, Robert S Allison
Jul 27, 2007·Vision Research·Laurie M WilcoxSuzanne P McKee
Feb 13, 2008·Perception·Hiroshi OnoNicholas J Wade
Oct 3, 1999·Perception·B G CummingA J Parker
Jun 19, 2019·Proceedings of the National Academy of Sciences of the United States of America·Milena KaestnerAlex R Wade

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