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Kara Liu

dblp:241/6103 · DBLP profile ↗
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1ranked-venue papers
1as first author
0since 2021 · last 2020
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Generative modeling · 40% Reinforcement learning · 20% Planning, search and constraint satisfaction · 20%

Topics — the 5 heaviest of 6, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Generative modeling › variational autoencoder
conditional variational autoencoder
0.412020
Hallucinative Topological Memory for Zero-Shot Visual Planning · ICML 2020
Machine learning › Reinforcement learning
model-based reinforcement learning
0.412020
Hallucinative Topological Memory for Zero-Shot Visual Planning · ICML 2020
Robotics › Robot navigation and mapping › robot mapping › cognitive map
topological memory
0.412020
Hallucinative Topological Memory for Zero-Shot Visual Planning · ICML 2020
Machine learning › Generative modeling
variational autoencoder
0.412020
Hallucinative Topological Memory for Zero-Shot Visual Planning · ICML 2020
Knowledge, reasoning and agents › Planning, search and constraint satisfaction › planning
visual planning
0.412020
Hallucinative Topological Memory for Zero-Shot Visual Planning · ICML 2020

Methods — techniques the papers use, named apart from their topics

graph search · 0.4energy-based model · 0.4contrastive predictive coding · 0.4
YearPublicationVenuePosition
2020 Hallucinative Topological Memory for Zero-Shot Visual Planning
abstract
In visual planning (VP), an agent learns to plan goal-directed behavior from observations of a dynamical system obtained offline, e.g., images obtained from self-supervised robot interaction. Most previous works on VP approached the problem by planning in a learned latent space, resulting in low-quality visual plans, and difficult training algorithms. Here, instead, we propose a simple VP method that plans directly in image space and displays competitive performance. We build on the semi-parametric topological memory (SPTM) method: image samples are treated as nodes in a graph, the graph connectivity is learned from image sequence data, and planning can be performed using conventional graph search methods. We propose two modifications on SPTM. First, we train an energy-based graph connectivity function using contrastive predictive coding that admits stable training. Second, to allow zero-shot planning in new domains, we learn a conditional VAE model that generates images given a context describing the domain, and use these hallucinated samples for building the connectivity graph and planning. We show that this simple approach significantly outperform the SOTA VP methods, in terms of both plan interpretability and success rate when using the plan to guide a trajectory-following controller. Interestingly, our method can pick up non-trivial visual properties of objects, such as their geometry, and account for it in the plans.
Kara Liu, Thanard Kurutach, Christine Tung, Pieter Abbeel, Aviv Tamar
ICML1