no code implementations • 1 Mar 2024 • Noriaki Hirose, Dhruv Shah, Kyle Stachowicz, Ajay Sridhar, Sergey Levine
Specifically, SELFI stabilizes the online learning process by incorporating the same model-based learning objective from offline pre-training into the Q-values learned with online model-free reinforcement learning.
no code implementations • 11 Oct 2023 • Ajay Sridhar, Dhruv Shah, Catherine Glossop, Sergey Levine
In this paper, we describe how we can train a single unified diffusion policy to handle both goal-directed navigation and goal-agnostic exploration, with the latter providing the ability to search novel environments, and the former providing the ability to reach a user-specified goal once it has been located.
no code implementations • 26 Jun 2023 • Dhruv Shah, Ajay Sridhar, Nitish Dashora, Kyle Stachowicz, Kevin Black, Noriaki Hirose, Sergey Levine
In this paper, we describe the Visual Navigation Transformer (ViNT), a foundation model that aims to bring the success of general-purpose pre-trained models to vision-based robotic navigation.
no code implementations • 2 Jun 2023 • Noriaki Hirose, Dhruv Shah, Ajay Sridhar, Sergey Levine
By minimizing this counterfactual perturbation, we can induce robots to behave in ways that do not alter the natural behavior of humans in the shared space.
no code implementations • 14 Oct 2022 • Noriaki Hirose, Dhruv Shah, Ajay Sridhar, Sergey Levine
Machine learning techniques rely on large and diverse datasets for generalization.
1 code implementation • 7 Oct 2022 • Dhruv Shah, Ajay Sridhar, Arjun Bhorkar, Noriaki Hirose, Sergey Levine
Learning provides a powerful tool for vision-based navigation, but the capabilities of learning-based policies are constrained by limited training data.