Title | ||
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Adaptive sampling of motion trajectories for discrete task-based analysis and synthesis of gesture |
Abstract | ||
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This paper addresses the problem of synthesizing in real time the motion of realistic virtual characters with a physics-based model from the analysis of human motion data. The synthesis is achieved by computing the motion equations of a dynamical model controlled by a sensory motor feedback loop with a non-parametric learning approach. The analysis is directly applied on end-effector trajectories captured from human motion. We have developed a Dynamic Programming Piecewise Linear Approximation model (DPPLA) that generates the discretization of these 3D Cartesian trajectories. The DPPLA algorithm leads to the identification of discrete target-patterns that constitute an adaptive sampling of the initial end-point trajectory. These sequences of samples non uniformly distributed along the trajectory are used as input of our sensory motor system. The synthesis of motion is illustrated on a dynamical model of a hand-arm system, each arm being represented by seven degrees of freedom. We show that the algorithm works on multi-dimensional variables and reduces the information flow at the command level with a good compression rate, thus providing a technique for motion data indexing and retrieval. Furthermore, the adaptive sampling seems to be correlated with some invariant law of human motion. |
Year | DOI | Venue |
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2005 | 10.1007/11678816_25 | Gesture Workshop |
Keywords | Field | DocType |
human motion,adaptive sampling,dynamical model,physics-based model,motion trajectory,human motion data,dppla algorithm,motion equation,motion data indexing,discrete task-based analysis,piecewise linear approximation model,cartesian trajectory,feedback loop,information flow,motor system,degree of freedom,real time | Discretization,Motion field,Adaptive sampling,Computer science,Control theory,Motion estimation,Equations of motion,Motion analysis,Motion system,Trajectory | Conference |
Volume | ISSN | ISBN |
3881 | 0302-9743 | 3-540-32624-3 |
Citations | PageRank | References |
8 | 0.63 | 13 |
Authors | ||
2 |
Name | Order | Citations | PageRank |
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Pierre-François Marteau | 1 | 62 | 17.30 |
Sylvie Gibet | 2 | 367 | 52.50 |