MESSI: Maximum Entropy Semi-Supervised Inverse Reinforcement Learning

Julien Audiffren 1 Michal Valko 2 Alessandro Lazaric 2 Mohammad Ghavamzadeh 2
2 SEQUEL - Sequential Learning
LIFL - Laboratoire d'Informatique Fondamentale de Lille, Inria Lille - Nord Europe, LAGIS - Laboratoire d'Automatique, Génie Informatique et Signal
Abstract : A popular approach to apprenticeship learning (AL) is to formulate it as an inverse reinforcement learning (IRL) problem. The MaxEnt-IRL algorithm successfully integrates the maximum entropy principle into IRL and unlike its predecessors, it resolves the ambiguity arising from the fact that a possibly large number of policies could match the expert's behavior. In this paper, we study an AL setting in which in addition to the expert's trajectories, a number of unsupervised trajectories is available. We introduce MESSI, a novel algorithm that combines MaxEnt-IRL with principles coming from semi-supervised learning. In particular, MESSI integrates the unsupervised data into the MaxEnt-IRL framework using a pairwise penalty on trajectories. Empirical results in a highway driving and grid-world problems indicate that MESSI is able to take advantage of the unsupervised trajectories and improve the performance of MaxEnt-IRL.
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Julien Audiffren, Michal Valko, Alessandro Lazaric, Mohammad Ghavamzadeh. MESSI: Maximum Entropy Semi-Supervised Inverse Reinforcement Learning. NIPS Workshop on Novel Trends and Applications in Reinforcement Learning, 2014, Montreal, Canada. ⟨hal-01177446⟩

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