Motion Compression using Principal Geodesics Analysis

Maxime Tournier 1 Xiaomao Wu 1 Nicolas Courty 2 Elise Arnaud 3 Lionel Reveret 1
1 EVASION - Virtual environments for animation and image synthesis of natural objects
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
3 PERCEPTION - Interpretation and Modelling of Images and Videos
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
Abstract : Due to the growing need for large quantities of human animation data in the entertainment industry, it has become a necessity to compress motion capture sequences in order to ease their storage and transmission. We present a novel, lossy compression method for human motion data that exploits both temporal and spatial coherence. Given one motion, we first approximate the poses manifold using Principal Geodesics Analysis (PGA) in the configuration space of the skeleton. We then search this approximate manifold for poses matching end-effectors constraints using an iterative minimization algorithm that allows for real-time, data-driven inverse kinematics. The compression is achieved by only storing the approximate manifold parametrization along with the end-effectors and root joint trajectories, also compressed, in the output data. We recover poses using the IK algorithm given the end-effectors trajectories. Our experimental results show that considerable compression rates can be obtained using our method, with few reconstruction and perceptual errors.
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Maxime Tournier, Xiaomao Wu, Nicolas Courty, Elise Arnaud, Lionel Reveret. Motion Compression using Principal Geodesics Analysis. Computer Graphics Forum, Wiley, 2009, Proceedings of Eurographics 2009, 28 (2), pp.355-364. ⟨10.1111/j.1467-8659.2009.01375.x⟩. ⟨inria-00384213⟩

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