I. Essa. Analysis, Interpretation, and Synthesis of Facial Expressions. PhD thesis, Massachusetts Institute of Technology, MIT Media Laboratory, Cambridge, MA 02139, USA, 1994. Available as MIT Media Lab Perceptual Computing Techreport # 303 from http://wwwwhite. media.mit.edu/vismod/.  Home/Search   Document Not in Database   Summary   Related Articles

....determined for the given geometry by using the triangular polygons as two dimensional isoparametric shell elements. Using these interpolation and strain displacement matrices, the mass, stiffness and damping matrix for each element were computed and then assembled into a matrix for the whole mesh [9]. Material properties of real human skin were used in this computation. These material properties were obtained from Pieper s Facial Surgery Simulator [26] and from other studies on mechanical properties of human bodies (e.g. 37] Physically based skin model muscles were attached to this using ....

....in Figure 6. This motion is projected onto the mesh and produces deformation of the skin. The controlfeedback loop (see Figure 2) estimates the muscle control needed to produce the observed temporal and spatial patterning. Mathematical details of the model and estimation framework are described in [9]. Limitations of Existing Representations The goal of this work is to develop a tool for more accurately modeling facial motion. The current state ofthe art for facial description (either FACS itself or musclecontrol versions of FACS) have two major weaknesses: ffl The action units are purely ....

I. Essa. Analysis, Interpretation, and Synthesis of Facial Expressions. PhD thesis, Massachusetts Institute of Technology, MIT Media Laboratory, Cambridge, MA 02139, USA, 1994. Available as MIT Media Lab Perceptual Computing Techreport # 303 from http://wwwwhite. media.mit.edu/vismod/.

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