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» On the singularity of a class of parametric curves
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SAC
2010
ACM
14 years 18 days ago
Constraint-based LN-curves
We consider the design of parametric curves from geometric constraints such as distance from lines or points and tangency to lines or circles. We solve the Hermite problem with su...
Young Joon Ahn, Christoph M. Hoffmann
APPML
2007
58views more  APPML 2007»
13 years 5 months ago
A class of exactly solvable free-boundary inhomogeneous porous medium flows
We describe a class of inhomogeneous two-dimensional porous medium flows, driven by a finite number of multipole sources; the free boundary dynamics can be parametrized by polyn...
Sam D. Howison, Igor Loutsenko, John R. Ockendon
MICS
2010
94views more  MICS 2010»
13 years 4 months ago
Arrangements on Parametric Surfaces I: General Framework and Infrastructure
We introduce a framework for the construction, maintenance, and manipulation of arrangements of curves embedded on certain two-dimensional orientable parametric surfaces in three-d...
Eric Berberich, Efi Fogel, Dan Halperin, Kurt Mehl...
CVPR
2005
IEEE
14 years 7 months ago
Particle Filtering for Geometric Active Contours with Application to Tracking Moving and Deforming Objects
Geometric active contours are formulated in a manner which is parametrization independent. As such, they are amenable to representation as the zero level set of the graph of a hig...
Yogesh Rathi, Namrata Vaswani, Allen Tannenbaum, A...
GMP
2006
IEEE
161views Solid Modeling» more  GMP 2006»
13 years 11 months ago
Tracking Point-Curve Critical Distances
This paper presents a novel approach to continuously and robustly tracking critical (geometrically, perpendicular and/or extremal) distances from a moving plane point p ∈ R2 to a...
Xianming Chen, Elaine Cohen, Richard F. Riesenfeld