We are both fans of watching animated stories. Every evening, before or after d- ner, we always sit in front of the television and watch the animation program, which is originally produced and shown for children. We find ourselves becoming younger while immerged in the interesting plot of the animation: how the princess is first killed and then rescued, how the little rat defeats the big cat, etc. But what we have found in those animation programs are not only interesting plots, but also a big chance for the application of computer science and artificial intelligence techniques. As is well known, the cost of producing animated movies is very high, even with the use of computer graphics techniques. Turning a story in text form into an animated movie is a long and complicated procedure. We came to the c- clusion that many parts of this process could be automated by using artificial - telligence techniques. It is actually a challenge and test for machine intelligence. So we decided to explore the possibility of a full life cycle automation of c- puter animation generation. By full life cycle we mean the generation process of computer animation from a children s story in natural language text form to the final animated movie. It is of course a task of immense difficulty. However, we decided to try our best and to see how far we could go.

Abstract: "The automatic generation of motion for animation remains an unsolved problem in computer graphics. One approach to the problem is to combine physically accurate models with control systems. The user specifies high-level goals and the control system computes the forces and torques that the simulated muscles or motors should exert to cause the model to perform the desired task. In this paper we describe control systems for rigid-body models of humans performing four tasks: pumping a swing, riding a seesaw, juggling, and pedaling a unicycle. We designed the control systems with the goal of producing natural-looking motion, and we discuss the techniques that we used to achieve this goal."

This book contains invited papers and a selection of research papers submitted to Computer Animation '91, the third international work shop on Computer Animation, which was held in Geneva on May 22-24. This workshop, now an annual event, has been organized by the Computer Graphics Society, the University of Geneva, and the Swiss Federal Institute of Technology in Lausanne. During the international workshop on Computer Animation '91, the fourth Computer-generated Film Festival of Geneva, was held. The book presents original research results and applications experience of the various areas of computer animation. This year most papers are related to character animation, human animation, facial animation, and motion contro!. NA DIA MAGNENAT THALMANN DANIEL THALMANN v Table of Contents Part I: Facial Animation Contral Parameterization for Facial Animation F. I. PARKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Linguistic Issues in Facial Animation C. PELACHAUD, N. !. BADLER, M. STEEDMAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Facial Animation by Spatial Mapping E. C. PATTERSON, P. c. LITWINOWICZ, N. GREENE . . . . . . . . . . . . . . . . . . . . . . . . . 31 A Transformation Method for Modeling and Animation of the Human Face fram Photographs T. KURlHARA, K. ARAI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Techniques for Realistic Facial Modeling and Animation D. TERZOPOULOS, K. WATERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Part ll: Human Modeling and Animation Generation of Human Motion with Emotion M. UNUMA, R. TAKEUCHI . . . . . . . . . . •. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Creating Realistic Three-Dimensional Human Shape Characters for Computer-Generated Films A. PAOURl, N. MAGNENATTHALMANN, D. THALMANN . . . . . . . . . . . . . . . . . . . 89 Design of Realistic Gaits for the Purpose of Animation N. VASlLONIKOLIDAKIS, G. J CLAPWORTHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

This book contains invited papers and a selection of research papers submitted to Computer Animation '91, the third international work shop on Computer Animation, which was held in Geneva on May 22-24. This workshop, now an annual event, has been organized by the Computer Graphics Society, the University of Geneva, and the Swiss Federal Institute of Technology in Lausanne. During the international workshop on Computer Animation '91, the fourth Computer-generated Film Festival of Geneva, was held. The book presents original research results and applications experience of the various areas of computer animation. This year most papers are related to character animation, human animation, facial animation, and motion contro!. NA DIA MAGNENAT THALMANN DANIEL THALMANN v Table of Contents Part I: Facial Animation Contral Parameterization for Facial Animation F. I. PARKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Linguistic Issues in Facial Animation C. PELACHAUD, N. !. BADLER, M. STEEDMAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Facial Animation by Spatial Mapping E. C. PATTERSON, P. c. LITWINOWICZ, N. GREENE . . . . . . . . . . . . . . . . . . . . . . . . . 31 A Transformation Method for Modeling and Animation of the Human Face fram Photographs T. KURlHARA, K. ARAI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Techniques for Realistic Facial Modeling and Animation D. TERZOPOULOS, K. WATERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Part ll: Human Modeling and Animation Generation of Human Motion with Emotion M. UNUMA, R. TAKEUCHI . . . . . . . . . . •. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Creating Realistic Three-Dimensional Human Shape Characters for Computer-Generated Films A. PAOURl, N. MAGNENATTHALMANN, D. THALMANN . . . . . . . . . . . . . . . . . . . 89 Design of Realistic Gaits for the Purpose of Animation N. VASlLONIKOLIDAKIS, G. J CLAPWORTHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Our project rests on the belief that computer animation in the form of narrated animated simulations can provide an engaging, effective and flexible medium for instructing agents of varying capabilities to perform tasks that make varying demands in workplaces of varying layout. To this end, we have been designing and implementing an integrated system which combines: animated agents which can demonstrate the behavior to be emulated and automatic generation of appropriate Natural Language narration which can explain what is being done and why.