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Motion Modeling for On-Line Locomotion Synthesis
Abstract In this paper,
we propose an example-based approach to on-line locomotion synthesis. Our
approach consists of two parts: motion analysis and motion synthesis. In the
motion analysis part, an unlabeled motion sequence is first decomposed into
motion segments, exploiting the behavior of the COM (center of mass)
trajectory of the performer. Those motion segments are subsequently
classified into groups of motion segments such that the same group of motion
segments share an identical footstep pattern. Finally, we construct a
hierarchical motion transition graph by representing these groups and their
connectivity to other groups as nodes and edges, respectively. The coarse
level of this graph models locomotive motions and their transitions, and the
fine level mainly captures the cyclic nature of locomotive motions. In the
motion synthesis part, given a stream of motion specifications in an on-line
manner, the motion transition graph is traversed while blending the motion
segments to synthesize a motion at a node, one by one, guided by the motion
specifications. Our main contributions are the motion labeling scheme and a
new motion model, embodied by the hierarchical motion transition graph, which
together enable not only artifact-free motion blending but also seamless motion
transition. Paper & Demo [Demo (AVI-Divx5)] |
