Search Results for author: Lukas Schäfer

Found 13 papers, 8 papers with code

Visual Encoders for Data-Efficient Imitation Learning in Modern Video Games

no code implementations4 Dec 2023 Lukas Schäfer, Logan Jones, Anssi Kanervisto, Yuhan Cao, Tabish Rashid, Raluca Georgescu, Dave Bignell, Siddhartha Sen, Andrea Treviño Gavito, Sam Devlin

Video games have served as useful benchmarks for the decision making community, but going beyond Atari games towards training agents in modern games has been prohibitively expensive for the vast majority of the research community.

Atari Games Imitation Learning

Using Offline Data to Speed-up Reinforcement Learning in Procedurally Generated Environments

no code implementations18 Apr 2023 Alain Andres, Lukas Schäfer, Esther Villar-Rodriguez, Stefano V. Albrecht, Javier Del Ser

Motivated by the recent success of Offline RL and Imitation Learning (IL), we conduct a study to investigate whether agents can leverage offline data in the form of trajectories to improve the sample-efficiency in procedurally generated environments.

Imitation Learning Offline RL +2

Ensemble Value Functions for Efficient Exploration in Multi-Agent Reinforcement Learning

no code implementations7 Feb 2023 Lukas Schäfer, Oliver Slumbers, Stephen Mcaleer, Yali Du, Stefano V. Albrecht, David Mguni

In this work, we propose ensemble value functions for multi-agent exploration (EMAX), a general framework to seamlessly extend value-based MARL algorithms with ensembles of value functions.

Efficient Exploration Multi-agent Reinforcement Learning +2

Multi-Horizon Representations with Hierarchical Forward Models for Reinforcement Learning

1 code implementation22 Jun 2022 Trevor McInroe, Lukas Schäfer, Stefano V. Albrecht

Learning control from pixels is difficult for reinforcement learning (RL) agents because representation learning and policy learning are intertwined.

reinforcement-learning Reinforcement Learning (RL) +1

Robust On-Policy Sampling for Data-Efficient Policy Evaluation in Reinforcement Learning

1 code implementation29 Nov 2021 Rujie Zhong, Duohan Zhang, Lukas Schäfer, Stefano V. Albrecht, Josiah P. Hanna

Reinforcement learning (RL) algorithms are often categorized as either on-policy or off-policy depending on whether they use data from a target policy of interest or from a different behavior policy.

Offline RL reinforcement-learning +1

Learning Temporally-Consistent Representations for Data-Efficient Reinforcement Learning

2 code implementations11 Oct 2021 Trevor McInroe, Lukas Schäfer, Stefano V. Albrecht

Deep reinforcement learning (RL) agents that exist in high-dimensional state spaces, such as those composed of images, have interconnected learning burdens.

reinforcement-learning Reinforcement Learning (RL) +1

Decoupled Reinforcement Learning to Stabilise Intrinsically-Motivated Exploration

1 code implementation ICML Workshop URL 2021 Lukas Schäfer, Filippos Christianos, Josiah P. Hanna, Stefano V. Albrecht

Intrinsic rewards can improve exploration in reinforcement learning, but the exploration process may suffer from instability caused by non-stationary reward shaping and strong dependency on hyperparameters.

reinforcement-learning Reinforcement Learning (RL)

Benchmarking Multi-Agent Deep Reinforcement Learning Algorithms in Cooperative Tasks

8 code implementations14 Jun 2020 Georgios Papoudakis, Filippos Christianos, Lukas Schäfer, Stefano V. Albrecht

Multi-agent deep reinforcement learning (MARL) suffers from a lack of commonly-used evaluation tasks and criteria, making comparisons between approaches difficult.

Benchmarking reinforcement-learning +1

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