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Inverse Reinforcement Learning (IRL) is attractive in scenarios where reward engineering can be tedious. However, prior IRL algorithms use on-policy transitions, which require intensive sampling from the current policy for stable and…

Machine Learning · Computer Science 2022-05-24 Hana Hoshino , Kei Ota , Asako Kanezaki , Rio Yokota

Following the impressive capabilities of in-context learning with large transformers, In-Context Imitation Learning (ICIL) is a promising opportunity for robotics. We introduce Instant Policy, which learns new tasks instantly (without…

Robotics · Computer Science 2025-04-28 Vitalis Vosylius , Edward Johns

Imitation learning is a class of promising policy learning algorithms that is free from many practical issues with reinforcement learning, such as the reward design issue and the exploration hardness. However, the current imitation…

Machine Learning · Computer Science 2022-10-19 Zhao-Heng Yin , Weirui Ye , Qifeng Chen , Yang Gao

We seek to align agent policy with human expert behavior in a reinforcement learning (RL) setting, without any prior knowledge about dynamics, reward function, and unsafe states. There is a human expert knowing the rewards and unsafe states…

Machine Learning · Computer Science 2020-01-01 Daniel Hsu

Adversarial methods for imitation learning have been shown to perform well on various control tasks. However, they require a large number of environment interactions for convergence. In this paper, we propose an end-to-end differentiable…

Machine Learning · Computer Science 2019-03-11 Vaibhav Saxena , Srinivasan Sivanandan , Pulkit Mathur

Recent work has explored the problem of autonomous navigation by imitating a teacher and learning an end-to-end policy, which directly predicts controls from raw images. However, these approaches tend to be sensitive to mistakes by the…

Computer Vision and Pattern Recognition · Computer Science 2019-05-24 Guohao Li , Matthias Müller , Vincent Casser , Neil Smith , Dominik L. Michels , Bernard Ghanem

For flexible yet safe imitation learning (IL), we propose theory and a modular method, with a safety layer that enables a closed-form probability density/gradient of the safe generative continuous policy, end-to-end generative adversarial…

Machine Learning · Computer Science 2023-07-31 Philipp Geiger , Christoph-Nikolas Straehle

Offline Imitation Learning (IL) with imperfect demonstrations has garnered increasing attention owing to the scarcity of expert data in many real-world domains. A fundamental problem in this scenario is how to extract positive behaviors…

Machine Learning · Computer Science 2024-05-31 Sheng Yue , Jiani Liu , Xingyuan Hua , Ju Ren , Sen Lin , Junshan Zhang , Yaoxue Zhang

While reinforcement learning (RL) has shown promising performance, its sample complexity continues to be a substantial hurdle, restricting its broader application across a variety of domains. Imitation learning (IL) utilizes oracles to…

Machine Learning · Computer Science 2025-08-12 Xuefeng Liu , Takuma Yoneda , Rick L. Stevens , Matthew R. Walter , Yuxin Chen

Imitation learning for robotic tasks has relied primarily on policies trained only on successful demonstrations, although failures are unavoidable during human data collection. Many existing approaches for exploiting failure data require…

Robotics · Computer Science 2026-05-21 Kana Miyamoto , Kanata Suzuki , Tetsuya Ogata

Interactive imitation learning is an efficient, model-free method through which a robot can learn a task by repetitively iterating an execution of a learning policy and a data collection by querying human demonstrations. However, deploying…

Robotics · Computer Science 2024-02-22 Hanbit Oh , Takamitsu Matsubara

Offline Reinforcement Learning (RL) addresses the problem of sequential decision-making by learning optimal policy through pre-collected data, without interacting with the environment. As yet, it has remained somewhat impractical, because…

Machine Learning · Computer Science 2024-10-07 Maksim Bobrin , Nazar Buzun , Dmitrii Krylov , Dmitry V. Dylov

Imitation learning (IL) enables agents to acquire skills by observing and replicating the behavior of one or multiple experts. In recent years, advances in deep learning have significantly expanded the capabilities and scalability of…

Machine Learning · Computer Science 2025-11-06 Iason Chrysomallis , Georgios Chalkiadakis

In inverse reinforcement learning (IRL), a learning agent infers a reward function encoding the underlying task using demonstrations from experts. However, many existing IRL techniques make the often unrealistic assumption that the agent…

Machine Learning · Computer Science 2023-01-04 Franck Djeumou , Christian Ellis , Murat Cubuktepe , Craig Lennon , Ufuk Topcu

Learning-based approaches, such as reinforcement learning (RL) and imitation learning (IL), have indicated superiority over rule-based approaches in complex urban autonomous driving environments, showing great potential to make intelligent…

Robotics · Computer Science 2022-05-31 Haochen Liu , Zhiyu Huang , Jingda Wu , Chen Lv

Imitation learning trains a policy from expert demonstrations. Imitation learning approaches have been designed from various principles, such as behavioral cloning via supervised learning, apprenticeship learning via inverse reinforcement…

Machine Learning · Computer Science 2019-11-19 Tian Xu , Ziniu Li , Yang Yu

Inverse reinforcement learning (IRL) is the problem of learning the preferences of an agent from the observations of its behavior on a task. While this problem has been well investigated, the related problem of {\em online} IRL---where the…

Machine Learning · Computer Science 2020-11-19 Saurabh Arora , Prashant Doshi , Bikramjit Banerjee

Interactive Imitation Learning (IIL) typically relies on extensive human involvement for both offline demonstration and online interaction. Prior work primarily focuses on reducing human effort in passive monitoring rather than active…

Robotics · Computer Science 2026-03-16 Chengjie Zhang , Chao Tang , Wenlong Dong , Dehao Huang , Aoxiang Gu , Hong Zhang

Imitation learning trains control policies by mimicking pre-recorded expert demonstrations. In partially observable settings, imitation policies must rely on observation histories, but many seemingly paradoxical results show better…

Machine Learning · Computer Science 2021-06-14 Chuan Wen , Jierui Lin , Jianing Qian , Yang Gao , Dinesh Jayaraman

The aim in imitation learning is to learn effective policies by utilizing near-optimal expert demonstrations. However, high-quality demonstrations from human experts can be expensive to obtain in large numbers. On the other hand, it is…

Machine Learning · Computer Science 2021-10-29 Mengjiao Yang , Sergey Levine , Ofir Nachum