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SuperTrack: Motion Tracking for Physically Simulated Characters using Supervised Learning

delete2021-12-10
delete36
PRE
AI
L
Levi Fussell *
D
Daniel Holden
DOI:10.1145/3478513.3480527delete
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摘要

摘要

En 中文
In this paper we show how the task of motion tracking for physically simulated characters can be solved using supervised learning and optimizing a policy directly via back-propagation. To achieve this we make use of a world model trained to approximate a specific subset of the environment's transition function, effectively acting as a differentiable physics simulator through which the policy can be optimized to minimize the tracking error. Compared to popular model-free methods of physically simulated character control which primarily make use of Proximal Policy Optimization (PPO) we find direct optimization of the policy via our approach consistently achieves a higher quality of control in a shorter training time, with a reduced sensitivity to the rate of experience gathering, dataset size, and distribution.
Keyword:
Motion Tracking
Motion Imitation
Imitation Learning
Reinforcement Learning
Character Animation
Motion Capture

期刊

ACM Transactions on Graphics 封面图
ACM Transactions on Graphics
IF:
9.5
论文数:
4.7K
被引数:
3.6W

机构

U
University of Edinburgh
学者数:
5.2W
论文数: 4.6W
被引数: 71
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