Modeling Conditional Dependencies in Multiagent Trajectories

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Modeling Conditional Dependencies in Multiagent Trajectories. / Rudolph, Yannick; Brefeld, Ulf.
In: Proceedings of Machine Learning Research, Vol. 151, 2022, p. 10518-10533.

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@article{f7a4f00425e0440d9fc2d7ab5bcf0b38,
title = "Modeling Conditional Dependencies in Multiagent Trajectories",
abstract = "We study modeling joint densities over sets of random variables (next-step movements of multiple agents) which are conditioned on aligned observations (past trajectories). For this setting, we propose an autoregressive approach to model intra-timestep dependencies, where distributions over joint movements are represented by autoregressive factorizations. In our approach, factors are randomly ordered and estimated with a graph neural network to account for permutation equivariance, while a recurrent neural network encodes past trajectories. We further propose a conditional two-stream attention mechanism, to allow for efficient training of random factorizations. We experiment on trajectory data from professional soccer matches and find that we model low frequency trajectories better than variational approaches.",
keywords = "Informatics, Business informatics",
author = "Yannick Rudolph and Ulf Brefeld",
note = "Funding Information: We would like to thank Marius Lehne at SAP SE for his essential support and help while writing this paper as well as all reviewers for their valuable feedback. Publisher Copyright: Copyright {\textcopyright} 2022 by the author(s); The 25th International Conference on Artificial Intelligence and Statistics - AISTATS 2022, AISTATS 2022 ; Conference date: 28-03-2022 Through 30-03-2022",
year = "2022",
language = "English",
volume = "151",
pages = "10518--10533",
journal = "Proceedings of Machine Learning Research",
issn = "2640-3498",
publisher = "MLResearch Press",
url = "http://aistats.org/aistats2022/",

}

RIS

TY - JOUR

T1 - Modeling Conditional Dependencies in Multiagent Trajectories

AU - Rudolph, Yannick

AU - Brefeld, Ulf

N1 - Conference code: 25

PY - 2022

Y1 - 2022

N2 - We study modeling joint densities over sets of random variables (next-step movements of multiple agents) which are conditioned on aligned observations (past trajectories). For this setting, we propose an autoregressive approach to model intra-timestep dependencies, where distributions over joint movements are represented by autoregressive factorizations. In our approach, factors are randomly ordered and estimated with a graph neural network to account for permutation equivariance, while a recurrent neural network encodes past trajectories. We further propose a conditional two-stream attention mechanism, to allow for efficient training of random factorizations. We experiment on trajectory data from professional soccer matches and find that we model low frequency trajectories better than variational approaches.

AB - We study modeling joint densities over sets of random variables (next-step movements of multiple agents) which are conditioned on aligned observations (past trajectories). For this setting, we propose an autoregressive approach to model intra-timestep dependencies, where distributions over joint movements are represented by autoregressive factorizations. In our approach, factors are randomly ordered and estimated with a graph neural network to account for permutation equivariance, while a recurrent neural network encodes past trajectories. We further propose a conditional two-stream attention mechanism, to allow for efficient training of random factorizations. We experiment on trajectory data from professional soccer matches and find that we model low frequency trajectories better than variational approaches.

KW - Informatics

KW - Business informatics

UR - http://www.scopus.com/inward/record.url?scp=85163100847&partnerID=8YFLogxK

M3 - Conference article in journal

VL - 151

SP - 10518

EP - 10533

JO - Proceedings of Machine Learning Research

JF - Proceedings of Machine Learning Research

SN - 2640-3498

T2 - The 25th International Conference on Artificial Intelligence and Statistics - AISTATS 2022

Y2 - 28 March 2022 through 30 March 2022

ER -