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epipolar.txt
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1994-08-19
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Title: Epipolar curves on surfaces
Authors: Peter J. Giblin and Richard S. Weiss
Affiliation: Computer Vision Research Laboratory, Dept. of
Computer Science, University of Massachusetts, Box 34610, Amherst, MA
0l003-4610
Abstract: The view lines associated with a
family of profile curves of the projection of a surface onto the retina
of a moving camera defines a multi-valued vector field on the surface.
The integral curves of this field are called epipolar curves and together
with a parametrization of the profiles provide a parametrization of regions of
the surface.
We present an investigation of epipolar
curves on the object surface and in a related
`spatio-temporal surface'. Where the
epipolar plane is tangent to the surface,
the epipolar curve has a cusp and
the epipolar parametrization breaks down .
A description is given for the geometry of all of the generic cases
where the epipolar parametrization breaks down.
These results give a systematic way of detecting
the gaps left by reconstruction of a surface from profiles.
Keywords: surface reconstruction, epipolar constraint,
epipolar curve, spatio-temporal surface.