Title :
Constrained deformable superquadrics and nonrigid motion tracking
Author :
Metaxas, Dimitri ; Terzopoulos, Demetri
Author_Institution :
Dept. of Comput. Sci., Toronto Univ., Ont., Canada
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
Keywords :
computer vision; computerised picture processing; 3-D motion; bending deformations; constrained deformable superquadrics; dynamics models; equations of motion; global deformation parameters; globally parameterized tapering; large-scale features; nonrigid motion tracking; physically based approach; physically based point-to-point constraints; Assembly; Computer science; Deformable models; Equations; Laboratories; Large-scale systems; Noise shaping; Shape; Solid modeling; Tracking;
Conference_Titel :
Computer Vision and Pattern Recognition, 1991. Proceedings CVPR '91., IEEE Computer Society Conference on
Conference_Location :
Maui, HI
Print_ISBN :
0-8186-2148-6
DOI :
10.1109/CVPR.1991.139712