Search Results for author: Stephan Liwicki

Found 11 papers, 6 papers with code

DiaLoc: An Iterative Approach to Embodied Dialog Localization

no code implementations11 Mar 2024 Chao Zhang, Mohan Li, Ignas Budvytis, Stephan Liwicki

However, most existing works in embodied dialog research focus on navigation and leave the localization task understudied.

Revisiting Recurrent Reinforcement Learning with Memory Monoids

1 code implementation15 Feb 2024 Steven Morad, Chris Lu, Ryan Kortvelesy, Stephan Liwicki, Jakob Foerster, Amanda Prorok

Memory models such as Recurrent Neural Networks (RNNs) and Transformers address Partially Observable Markov Decision Processes (POMDPs) by mapping trajectories to latent Markov states.

reinforcement-learning

ReCoRe: Regularized Contrastive Representation Learning of World Model

no code implementations14 Dec 2023 Rudra P. K. Poudel, Harit Pandya, Stephan Liwicki, Roberto Cipolla

To address these challenges, we present a world model that learns invariant features using (i) contrastive unsupervised learning and (ii) an intervention-invariant regularizer.

Contrastive Learning Depth Estimation +7

Self-Supervised Consistent Quantization for Fully Unsupervised Image Retrieval

no code implementations20 Jun 2022 Guile Wu, Chao Zhang, Stephan Liwicki

In global consistent quantization, we employ contrastive learning for both embedding and quantized representations and fuses these representations for consistent contrastive regularization between instances.

Contrastive Learning Image Retrieval +2

Graph Convolutional Memory using Topological Priors

1 code implementation27 Jun 2021 Steven D. Morad, Stephan Liwicki, Ryan Kortvelesy, Roberto Mecca, Amanda Prorok

Solving partially-observable Markov decision processes (POMDPs) is critical when applying reinforcement learning to real-world problems, where agents have an incomplete view of the world.

Memorization reinforcement-learning +1

Orientation-aware Semantic Segmentation on Icosahedron Spheres

1 code implementation ICCV 2019 Chao Zhang, Stephan Liwicki, William Smith, Roberto Cipolla

For the spherical domain, several methods recently adopt an icosahedron mesh, but systems are typically rotation invariant or require significant memory and parameters, thus enabling execution only at very low resolutions.

Autonomous Driving Semantic Segmentation

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