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Published in the journal of visualization and computer animation, 1(2)7380, 1990. Physically-based facial modeling, analysis, and animation demetri terzopoulos y z and keith waters y schlumberger laboratory for computer science, p. Box 200015, austin, tx 78720 z department of computer science, university of toronto, toronto, ontario, m5s 1a4 abstract we develop a new 3d hierarchical. Despite its sophistication, the model is efficient enough to produce facial animation at interactive rates on a highend graphics workstation. Computer animation and virtual worlds is the first journal to address the global thematic of the virtual worlds. These consist of computer animation, embodied agents, virtual environments, augmented reality, virtual life and visualisation. This hybrid journal is read by scientists, artists and technicians applying animation techniques. this paper presents an automatic and effective approach for 3d face segmentation, feature extraction, rigging and animation. The 3d model we used is a triangular mesh model in obj file format. Combining the position information and neighbor coordinates of the points, the facial segmentation and feature extraction can be finished based on gaussian curvature, shape indexes and face geometry. Citeseerx - document details (isaac councill, lee giles, pradeep teregowda) we develop a new 3d hierarchical model of the human face. The model incorporates a physically-based approximation to facial tissue and a set of anatomically-motivated facial muscle actuators. Despite its sophistication, the model is efficient enough to produce facial animation at interactive rates on a high-end. a modelling approach for the realistic simulation of facial expressions of emotion in craniofacial surgery planning is presented. The method is different from conventional, non-physical techniques for character animation in computer graphics. A consistent physiological mechanism for facial expressions was assumed, which was the effect of contracting muscles on soft tissues. Demetri terzopoulos is an internationally renowned researcher in both computer vision and computer graphics and his work has helped to unify these two fields. Computer facial animation is primarily an area of computer graphics that encapsulates methods and techniques for generating and animating images or models of a character face. The character can be a human, a humanoid, an animal, a legendary creature or character, etc. Due to its subject and output type, it is also related to many other scientific and artistic fields from psychology to.