Modelbased Manipulations of B-Spline Surfaces to simulate Deformations of the Facial Tissue

Abstract

In 1990 Waters (1) and Terzopoulos (2) introduced a tissue model, which contains a mass springsystem within five layers. In that system muscelactors manipulate the layers of the tissue model. In contrast we only manipulate the lowest springlayer, which represents the facial bones.
We use the resulting pertubation of the equilibrium to simulate the deformations of the highest springlayer, which represents the epidermis of the facial tissue.

The most often used method to visualize the surface is the polygonal rendering method. In this treatise we present a splinebased method to render the facial skin.

My advisor was Erwin Keeve at the Telecommunications Institute .

Postscript versions of the

• thesis (in german, 1MB) or of the
• slides (in english, 1/4 MB)

1. Digital Equipment Corporation
   Cambridge Research Lab, USA
2. Department of Computer Science
   University of Toronto, Canada