no code implementations • 2 Jul 2024 • Annie S. Chen, Alec M. Lessing, Andy Tang, Govind Chada, Laura Smith, Sergey Levine, Chelsea Finn
Legged robots are physically capable of navigating a diverse variety of environments and overcoming a wide range of obstructions.
1 code implementation • 22 Feb 2024 • Johnathan Xie, Yoonho Lee, Annie S. Chen, Chelsea Finn
Self-supervised learning excels in learning representations from large amounts of unlabeled data, demonstrating success across multiple data modalities.
no code implementations • 2 Nov 2023 • Annie S. Chen, Govind Chada, Laura Smith, Archit Sharma, Zipeng Fu, Sergey Levine, Chelsea Finn
We provide theoretical analysis of our selection mechanism and demonstrate that ROAM enables a robot to adapt rapidly to changes in dynamics both in simulation and on a real Go1 quadruped, even successfully moving forward with roller skates on its feet.
no code implementations • 19 Jun 2023 • Annie S. Chen, Yoonho Lee, Amrith Setlur, Sergey Levine, Chelsea Finn
Effective machine learning models learn both robust features that directly determine the outcome of interest (e. g., an object with wheels is more likely to be a car), and shortcut features (e. g., an object on a road is more likely to be a car).
2 code implementations • 24 Feb 2023 • Siddharth Karamcheti, Suraj Nair, Annie S. Chen, Thomas Kollar, Chelsea Finn, Dorsa Sadigh, Percy Liang
First, we demonstrate that existing representations yield inconsistent results across these tasks: masked autoencoding approaches pick up on low-level spatial features at the cost of high-level semantics, while contrastive learning approaches capture the opposite.
no code implementations • 10 Feb 2023 • Annie S. Chen, Yoonho Lee, Amrith Setlur, Sergey Levine, Chelsea Finn
Transfer learning with a small amount of target data is an effective and common approach to adapting a pre-trained model to distribution shifts.
1 code implementation • 20 Oct 2022 • Yoonho Lee, Annie S. Chen, Fahim Tajwar, Ananya Kumar, Huaxiu Yao, Percy Liang, Chelsea Finn
A common approach to transfer learning under distribution shift is to fine-tune the last few layers of a pre-trained model, preserving learned features while also adapting to the new task.
no code implementations • 17 Oct 2022 • Annie S. Chen, Archit Sharma, Sergey Levine, Chelsea Finn
We formalize this problem setting, which we call single-life reinforcement learning (SLRL), where an agent must complete a task within a single episode without interventions, utilizing its prior experience while contending with some form of novelty.
1 code implementation • 19 Jul 2021 • Evan Zheran Liu, Behzad Haghgoo, Annie S. Chen, aditi raghunathan, Pang Wei Koh, Shiori Sagawa, Percy Liang, Chelsea Finn
Standard training via empirical risk minimization (ERM) can produce models that achieve high accuracy on average but low accuracy on certain groups, especially in the presence of spurious correlations between the input and label.
Ranked #1 on Out-of-Distribution Generalization on ImageNet-W
no code implementations • 31 Mar 2021 • Annie S. Chen, Suraj Nair, Chelsea Finn
We find that by leveraging diverse human datasets, this reward function (a) can generalize zero shot to unseen environments, (b) generalize zero shot to unseen tasks, and (c) can be combined with visual model predictive control to solve robotic manipulation tasks on a real WidowX200 robot in an unseen environment from a single human demo.
1 code implementation • 22 Oct 2020 • Annie S. Chen, HyunJi Nam, Suraj Nair, Chelsea Finn
Concretely, we propose an exploration technique, Batch Exploration with Examples (BEE), that explores relevant regions of the state-space, guided by a modest number of human provided images of important states.