GVU Technical Report Number:
GIT-GVU-92-15
Title:
Anisotropies in Stereo Depth Thresholds of Spatial Patterns and the
Stereo Aperture Problem
Authors:
Elizabeth Thorpe Davis
Robert A. King
Brian Guenter
Alana Anoskey
Abstract:
Does a pattern's orientation affect stereoacuity? Do vertical
disparities play a role in stereopsis? Furthermore, is retinal disparity
encoded by changes in spatial position or spatial phase? The latter
implies a "stereo aperture problem" -- only disparities perpendicular to
the pattern's orientation are encoded. We found stereoacuities are worse
for oblique patterns than for vertical patterns, but are worse for
horizontal patterns. Moreover, for oblique patterns (unlike vertical or
horizontal patterns), vertical disparity can be as effective as
horizontal disparity. Results for vertical and oblique patterns suggest
spatial phase encoding of disparity. In contrast, results for horizontal
patterns suggest spatial postition encoding of disparity.
Keywords:
Stereopsis, stereoacuities, anisotropies, orientation, stereo aperture
problem
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