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Puppet Master: Designing Reactive Character Behavior by Demonstration

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Author
Young, James
Igarashi, Takeo
Sharlin, Ehud
Accessioned
2008-06-09T20:23:52Z
Available
2008-06-09T20:23:52Z
Issued
2008-06-09T20:23:52Z
Other
Interactive animation
Demonstration, Artistic Design, Interaction
Subject
Computer graphics
Methodology and Techniques - Interaction Techniques
Type
technical report
Metadata
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Abstract
We present Puppet Master, a system that enables designers to rapidly create interactive and autonomous character behaviors (e.g., of a virtual character or a robot) that react to a main character controlled by an end-user. The behavior is designed by demonstration, allowing non-technical artists to intuitively design the style, personality, and emotion of the character, traits which are very difficult to design using conventional programming approaches. During training, designers demonstrate paired behavior between the main and reacting characters. During run time, the end user controls the main character and the system synthesizes the motion of the reacting character using the given training data. The algorithm is an extension of image analogies [Hertzmann et al. 2001], modified to synthesize dynamic character behavior instead of an image. We introduce non-trivial extensions to the algorithm such as our selection of features, dynamic balancing between similarity metrics, and separate treatment of path trajectory and high-frequency motion texture. We implemented a prototype system using physical pucks tracked by a motion-capture system and conducted a user study demonstrating that novice users can easily and successfully design character personality and emotion using our system and that the resulting behaviors are meaningful and engaging.
Refereed
No
Corporate
University of Calgary
Faculty
Science
Doi
http://dx.doi.org/10.11575/PRISM/31028
Uri
http://hdl.handle.net/1880/46630
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  • Science Research & Publications

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