Abstract
A physically based approach to the recovery of nonrigid 3-D motion
and the tracking of nonrigid objects is presented. The approach makes
use of deformable superquadrics, dynamics models that offer global
deformation parameters which capture large-scale features and local
deformation parameters which capture the details of complex shapes. The
equations of motion governing the behavior of the models make them
responsive to externally applied forces. The authors extend their prior
formulation of these equations to include globally parameterized
tapering and bending deformations. They further generalize the
formulation to handle physically based point-to-point constraints
between models. Such constraints enable one to automatically assemble
object models from interconnected deformable superquadric parts. These
composite models may be used to track the motions of articulated,
flexible objects
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