Search Results for author: Christopher J. Rozell

Found 11 papers, 7 papers with code

Manifold Contrastive Learning with Variational Lie Group Operators

1 code implementation23 Jun 2023 Kion Fallah, Alec Helbling, Kyle A. Johnsen, Christopher J. Rozell

In this work, we propose a contrastive learning approach that directly models the latent manifold using Lie group operators parameterized by coefficients with a sparsity-promoting prior.

Contrastive Learning Representation Learning +1

PrefGen: Preference Guided Image Generation with Relative Attributes

1 code implementation1 Apr 2023 Alec Helbling, Christopher J. Rozell, Matthew O'Shaughnessy, Kion Fallah

Using information from a sequence of query responses, we can estimate user preferences over a set of image attributes and perform preference-guided image editing and generation.

Attribute Image Generation

Decomposed Linear Dynamical Systems (dLDS) for learning the latent components of neural dynamics

1 code implementation7 Jun 2022 Noga Mudrik, Yenho Chen, Eva Yezerets, Christopher J. Rozell, Adam S. Charles

Learning interpretable representations of neural dynamics at a population level is a crucial first step to understanding how observed neural activity relates to perception and behavior.

Dictionary Learning Time Series Analysis

Variational Sparse Coding with Learned Thresholding

2 code implementations7 May 2022 Kion Fallah, Christopher J. Rozell

Sparse coding strategies have been lauded for their parsimonious representations of data that leverage low dimensional structure.

Variational Inference

Variational Autoencoder with Learned Latent Structure

1 code implementation18 Jun 2020 Marissa C. Connor, Gregory H. Canal, Christopher J. Rozell

This enables us to learn the nonlinear manifold structure from the data and use that structure to define a prior in the latent space.

Hierarchical Optimal Transport for Multimodal Distribution Alignment

2 code implementations NeurIPS 2019 John Lee, Max Dabagia, Eva L. Dyer, Christopher J. Rozell

Our results demonstrate that when clustered structure exists in datasets, and is consistent across trials or time points, a hierarchical alignment strategy that leverages such structure can provide significant improvements in cross-domain alignment.

Active embedding search via noisy paired comparisons

1 code implementation10 May 2019 Gregory H. Canal, Andrew K. Massimino, Mark A. Davenport, Christopher J. Rozell

Suppose that we wish to estimate a user's preference vector $w$ from paired comparisons of the form "does user $w$ prefer item $p$ or item $q$?," where both the user and items are embedded in a low-dimensional Euclidean space with distances that reflect user and item similarities.

Recommendation Systems

Efficient Tracking of Sparse Signals via an Earth Mover's Distance Dynamics Regularizer

no code implementations12 Jun 2018 Nicholas P. Bertrand, Adam S. Charles, John Lee, Pavel B. Dunn, Christopher J. Rozell

Tracking algorithms such as the Kalman filter aim to improve inference performance by leveraging the temporal dynamics in streaming observations.

Short Term Memory Capacity in Networks via the Restricted Isometry Property

no code implementations1 Jul 2013 Adam S. Charles, Han Lun Yap, Christopher J. Rozell

Cortical networks are hypothesized to rely on transient network activity to support short term memory (STM).

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