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Summary: 3D MODEL REFINEMENT USING SURFACE-PARALLAX
Amit K Agrawal and Rama Chellappa
University of Maryland
Department of Electrical and Computer Engineering
College Park, MD 20742 USA
ABSTRACT
We present an approach to update and refine coarse 3D models
of urban environments from a sequence of intensity images us-
ing surface parallax. This generalizes the plane-parallax recov-
ery methods to surface-parallax using arbitrary surfaces. A coarse
and potentially incomplete depth map of the scene obtained from a
Digital Elevation Map (DEM) is used as a reference surface which
is refined and updated using this approach. The reference depth
map is used to estimate the camera motion and the motion of the
3D points on the reference surface is compensated. The resulting
parallax, which is an epipolar field, is estimated using an adaptive
windowing technique and used to obtain the refined depth map.
1. INTRODUCTION
3D reconstruction from images or multiple views has been an ac-
tive research area over the past few decades. Traditional methods
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