Search Results for author: Mariano Tepper

Found 14 papers, 6 papers with code

LeanVec: Searching vectors faster by making them fit

1 code implementation26 Dec 2023 Mariano Tepper, Ishwar Singh Bhati, Cecilia Aguerrebere, Mark Hildebrand, Ted Willke

In this work, we present LeanVec, a framework that combines linear dimensionality reduction with vector quantization to accelerate similarity search on high-dimensional vectors while maintaining accuracy.

Cross-Modal Retrieval Dimensionality Reduction +1

CoLiDE: Concomitant Linear DAG Estimation

1 code implementation4 Oct 2023 Seyed Saman Saboksayr, Gonzalo Mateos, Mariano Tepper

We deal with the combinatorial problem of learning directed acyclic graph (DAG) structure from observational data adhering to a linear structural equation model (SEM).

Similarity search in the blink of an eye with compressed indices

1 code implementation7 Apr 2023 Cecilia Aguerrebere, Ishwar Bhati, Mark Hildebrand, Mariano Tepper, Ted Willke

In this work, we present new techniques and systems for creating faster and smaller graph-based indices.

Quantization

Toward a Geometrical Understanding of Self-supervised Contrastive Learning

no code implementations13 May 2022 Romain Cosentino, Anirvan Sengupta, Salman Avestimehr, Mahdi Soltanolkotabi, Antonio Ortega, Ted Willke, Mariano Tepper

When used for transfer learning, the projector is discarded since empirical results show that its representation generalizes more poorly than the encoder's.

Contrastive Learning Data Augmentation +2

Procrustean Orthogonal Sparse Hashing

no code implementations8 Jun 2020 Mariano Tepper, Dipanjan Sengupta, Ted Willke

We compare POSH, Binary OSL, and SphericalHash to several state-of-the-art hashing methods and provide empirical results for the superiority of the proposed methods across a wide range of standard benchmarks and parameter settings.

Do place cells dream of conditional probabilities? Learning Neural Nyström representations

no code implementations3 Jun 2019 Mariano Tepper

We posit that hippocampal place cells encode information about future locations under a transition distribution observed as an agent explores a given (physical or conceptual) space.

Manifold-tiling Localized Receptive Fields are Optimal in Similarity-preserving Neural Networks

1 code implementation NeurIPS 2018 Anirvan Sengupta, Cengiz Pehlevan, Mariano Tepper, Alexander Genkin, Dmitri Chklovskii

Many neurons in the brain, such as place cells in the rodent hippocampus, have localized receptive fields, i. e., they respond to a small neighborhood of stimulus space.

Hippocampus

Clustering is semidefinitely not that hard: Nonnegative SDP for manifold disentangling

no code implementations19 Jun 2017 Mariano Tepper, Anirvan M. Sengupta, Dmitri Chklovskii

In solving hard computational problems, semidefinite program (SDP) relaxations often play an important role because they come with a guarantee of optimality.

Clustering

Nonnegative Matrix Underapproximation for Robust Multiple Model Fitting

no code implementations CVPR 2017 Mariano Tepper, Guillermo Sapiro

In this work, we introduce a highly efficient algorithm to address the nonnegative matrix underapproximation (NMU) problem, i. e., nonnegative matrix factorization (NMF) with an additional underapproximation constraint.

Fast L1-NMF for Multiple Parametric Model Estimation

1 code implementation18 Oct 2016 Mariano Tepper, Guillermo Sapiro

In this work we introduce a comprehensive algorithmic pipeline for multiple parametric model estimation.

Compressed Nonnegative Matrix Factorization is Fast and Accurate

1 code implementation18 May 2015 Mariano Tepper, Guillermo Sapiro

To address this, in this work we propose to use structured random compression, that is, random projections that exploit the data structure, for two NMF variants: classical and separable.

A Bi-clustering Framework for Consensus Problems

no code implementations30 Apr 2014 Mariano Tepper, Guillermo Sapiro

We consider grouping as a general characterization for problems such as clustering, community detection in networks, and multiple parametric model estimation.

Clustering Community Detection

Video Human Segmentation using Fuzzy Object Models and its Application to Body Pose Estimation of Toddlers for Behavior Studies

no code implementations29 May 2013 Thiago V. Spina, Mariano Tepper, Amy Esler, Vassilios Morellas, Nikolaos Papanikolopoulos, Alexandre X. Falcão, Guillermo Sapiro

Video object segmentation is a challenging problem due to the presence of deformable, connected, and articulated objects, intra- and inter-object occlusions, object motion, and poor lighting.

Object Pose Estimation +4

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