van Ee, Raymond and van Dam, Loes CJ (2003) The influence of cyclovergence on unconstrained stereoscopic matching. Vision Research, 43 (3). pp. 307-319. DOI https://doi.org/10.1016/s0042-6989(02)00496-0
van Ee, Raymond and van Dam, Loes CJ (2003) The influence of cyclovergence on unconstrained stereoscopic matching. Vision Research, 43 (3). pp. 307-319. DOI https://doi.org/10.1016/s0042-6989(02)00496-0
van Ee, Raymond and van Dam, Loes CJ (2003) The influence of cyclovergence on unconstrained stereoscopic matching. Vision Research, 43 (3). pp. 307-319. DOI https://doi.org/10.1016/s0042-6989(02)00496-0
Abstract
In order to perceive depth from binocular disparities the visual system has to identify matching features of the two retinal images. Normally, the assigned disparity is unambiguously determined by monocularly visible matching constraints. The assigned disparity is ambiguous when matching is unconstrained, such as when we view an isolated long oblique disparate line. Recently we found that in order to perceive a depth probe at the same depth as the oblique line, the probe needs to have the same horizontal disparity as the line (i.e. matching occurs along horizontal "search-zones" [Vis. Res. 40 (2000) 151]). Here we examined whether the depth probe disparity in unconstrained matching of long lines is influenced by cyclovergence, by cyclorotation between stereogram half-images, or by combinations of the two. We measured retinal rotation (6 deg in cyclovergence conditions). We found that in those conditions in which the retinal images were the same (a condition with, say, both zero cyclovergence and zero cyclorotation between the half-images, creates the same retinal images as a condition with both 6 deg cyclovergence and 6 deg cyclorotation) assigned depth was the same too, i.e. independent of cyclovergence. Thus, the assigned depth of the test-line seems to be determined solely by the retinal test-line orientation, implying that the binocular matching algorithm does not seem to incorporate the eyes' cyclovergence when matching is unconstrained. © 2002 Elsevier Science Ltd. All rights reserved.
Item Type: | Article |
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Uncontrolled Keywords: | binocular vision; stereopsis; disparity; matching; binocular correspondence |
Subjects: | B Philosophy. Psychology. Religion > BF Psychology R Medicine > RE Ophthalmology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Psychology, Department of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 26 Jul 2016 14:43 |
Last Modified: | 07 Aug 2024 20:06 |
URI: | http://repository.essex.ac.uk/id/eprint/17304 |
Available files
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