Patent ID: 6369815
Filing Date: 2002-04-09
Classification: G06T

Abstract:
A method for using hierarchical representations in a solid model to perform local deformations within a face by using seam constraints, said method comprising the steps of:a. obtaining a solid model of a shape containing one or more faces, where each face is represented by a parametric mapping from a domain space into an image space; b. creating a containment hierarchy within a face consisting of a parent patch and at least one level of child patches; c. for each child patch in the containment hierarchy, creating a seam constraint connecting the child patch and the child patch's parent, where: i. the seam constraint consists of any simple closed loop curve within the domain spaces of both the parent and the child patch; and ii. the seam constraint acts as a constraint on the child patch to force the child patch to track the shape of the parent patch; d. deforming the containment hierarchy, such that if a parent patch is deformed, all child patches of that parent patch are deformed to track the parent patch.