Three-dimensional descriptions based on the analysis of theinvariant and quasi-invariant properties of some curved-axis generalizedcylinders
Zerroug, M.
Nevatia, R.
Inst. for Robotics & Intelligent Syst., Univ. of Southern California, Los Angeles, CA;
This paper appears in: Pattern Analysis and Machine Intelligence, IEEE Transactions on
Publication Date: Mar 1996
Volume: 18,
Issue: 3
On page(s): 237-253
ISSN: 0162-8828
References Cited: 36
CODEN: ITPIDJ
INSPEC Accession Number: 5234460
Digital Object Identifier: 10.1109/34.485553
Current Version Published: 2002-08-06
Abstract
We address the recovery of object-level 3D descriptions of some
classes of curved-axis generalized cylinders. For this, the first part
of the paper analyzes the projective properties of two common generic
shapes, planar right constant generalized cylinders (PRCGCs) and
circular planar right generalized cylinders (circular PRGCs). The
properties we analyze include new geometric invariant and
quasi-invariant properties of the orthographic projection of the above
shapes and a useful classification of their structural properties as
functions of their pose. The second part of the paper describes an
implemented system which detects and recovers PRCGCs and circular PRGCs
from an intensity image in the presence of noise, surface markings,
shadows, and partial occlusion. The methods exploit the projective
properties to hypothesize and verify relevant curved-axis objects, thus
explicitly using the three-dimensionality of the objects and of the
desired descriptions. This work extends past work on the recovery of
volumetric shapes from an intensity image by addressing new primitives,
deriving new properties and by developing a system that recovers them
from an intensity image. We demonstrate our method on several real
intensity images
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