Qualitative depth from vertical and horizontal binoculardisparities, in agreement with psychophysical evidence
Weinshall, D.
MIT, Cambridge, MA;
This paper appears in: Computer Vision and Pattern Recognition, 1988. Proceedings CVPR '88., Computer Society Conference on
Publication Date: 5-9 Jun 1988
On page(s): 159-164
Meeting Date: 06/05/1988 - 06/09/1988
Location: Ann Arbor, MI, USA
ISBN: 0-8186-0862-5
References Cited: 19
INSPEC Accession Number: 3258511
Digital Object Identifier: 10.1109/CVPR.1988.196230
Current Version Published: 2002-08-06
Abstract
The author concentrates on the problem of obtaining depth
information from binocular disparities. It is motivated by the fact that
implementing registration algorithms and using the results for depth
computations is hard in practice with real images due to noise and
quantization errors. It is shown that qualitative depth information can
be obtained from stereo disparities with almost no computations, and
with no prior knowledge (or computation) of camera parameters. The only
constraint is that the epipolar plane of the fixation point includes the
X-axes of both cameras. Two expressions are derived that order
all matched points in the images in two distinct depth-consistent ways
from image coordinates only. One is a tilt-related order λ, which
depends only on the polar angles of the matched points, the other is a
depth-related order χ. Using λ for tilt estimation and point
separation (in depth) demonstrates some anomalies and unusual
characteristics that have been observed in psychophysical experiments,
most notably the induced size effect
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