An animation system for imitation of object grasping in virtual reality

Authors:
Matthias Weber;Guido Heumer;Heni Ben Amor;Bernhard Jung
Affiliations:
VR and Multimedia Group, TU Bergakademie Freiberg, Freiberg, Germany;VR and Multimedia Group, TU Bergakademie Freiberg, Freiberg, Germany;VR and Multimedia Group, TU Bergakademie Freiberg, Freiberg, Germany;VR and Multimedia Group, TU Bergakademie Freiberg, Freiberg, Germany
Venue:
ICAT'06 Proceedings of the 16th international conference on Advances in Artificial Reality and Tele-Existence
Year:
2006

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Abstract

Interactive virtual characters are nowadays commonplace in games, animations, and Virtual Reality (VR) applications. However, relatively few work has so far considered the animation of interactive object manipulations performed by virtual humans. In this paper, we first present a hierarchical control architecture incorporating plans, behaviors, and motor programs that enables virtual humans to accurately manipulate scene objects using different grasp types. Furthermore, as second main contribution, we introduce a method by which virtual humans learn to imitate object manipulations performed by human VR users. To this end, movements of the VR user are analyzed and processed into abstract actions. A new data structure called grasp events is used for storing information about user interactions with scene objects. High-level plans are instantiated based on grasp events to drive the virtual humans’ animation. Due to their high-level representation, recorded manipulations often naturally adapt to new situations without losing plausibility.