Search Results for author: Thomas Oberlin

Found 16 papers, 6 papers with code

Leveraging Self-Supervised Instance Contrastive Learning for Radar Object Detection

no code implementations13 Feb 2024 Colin Decourt, Rufin VanRullen, Didier Salle, Thomas Oberlin

In recent years, driven by the need for safer and more autonomous transport systems, the automotive industry has shifted toward integrating a growing number of Advanced Driver Assistance Systems (ADAS).

Contrastive Learning Object +5

A recurrent CNN for online object detection on raw radar frames

1 code implementation21 Dec 2022 Colin Decourt, Rufin VanRullen, Didier Salle, Thomas Oberlin

Exploiting the time information (e. g., multiple frames) has been shown to help to capture better the dynamics of objects and, therefore, the variation in the shape of objects.

Object object-detection +2

DAROD: A Deep Automotive Radar Object Detector on Range-Doppler maps

1 code implementation 2022 IEEE Intelligent Vehicles Symposium (IV) 2022 Colin Decourt, Rufin VanRullen, Didier Salle, Thomas Oberlin

Due to the small number of raw data automotive radar datasets and the low resolution of such radar sensors, automotive radar object detection has been little explored with deep learning models in comparison to camera and lidar-based approaches.

Object object-detection +2

Algorithms for audio inpainting based on probabilistic nonnegative matrix factorization

2 code implementations28 Jun 2022 Ondřej Mokrý, Paul Magron, Thomas Oberlin, Cédric Févotte

First, we treat the missing samples as latent variables, and derive two expectation-maximization algorithms for estimating the parameters of the model, depending on whether we formulate the problem in the time- or time-frequency domain.

Audio inpainting

Regularization via deep generative models: an analysis point of view

no code implementations21 Jan 2021 Thomas Oberlin, Mathieu Verm

We illustrate the interest of such a formulation by running experiments of inpainting, deblurring and super-resolution.

Deblurring Super-Resolution

Phase retrieval with Bregman divergences and application to audio signal recovery

no code implementations1 Oct 2020 Pierre-Hugo Vial, Paul Magron, Thomas Oberlin, Cédric Févotte

Therefore, we formulate PR as a new minimization problem involving Bregman divergences.

Sound

Fast reconstruction of atomic-scale STEM-EELS images from sparse sampling

1 code implementation4 Feb 2020 Etienne Monier, Thomas Oberlin, Nathalie Brun, Xiaoyan Li, Marcel Tencé, Nicolas Dobigeon

Besides, among the methods proposed in the microscopy literature, some are fast but inaccurate while others provide accurate reconstruction but at the price of a high computation burden.

Image Reconstruction

Recommendation from Raw Data with Adaptive Compound Poisson Factorization

1 code implementation20 May 2019 Olivier Gouvert, Thomas Oberlin, Cédric Févotte

Count data are often used in recommender systems: they are widespread (song play counts, product purchases, clicks on web pages) and can reveal user preference without any explicit rating from the user.

Binarization Recommendation Systems

Factor analysis of dynamic PET images: beyond Gaussian noise

no code implementations30 Jul 2018 Yanna Cruz Cavalcanti, Thomas Oberlin, Nicolas Dobigeon, Cédric Févotte, Simon Stute, Maria-Joao Ribeiro, Clovis Tauber

Factor analysis has proven to be a relevant tool for extracting tissue time-activity curves (TACs) in dynamic PET images, since it allows for an unsupervised analysis of the data.

Coupled dictionary learning for unsupervised change detection between multi-sensor remote sensing images

no code implementations21 Jul 2018 Vinicius Ferraris, Nicolas Dobigeon, Yanna Cavalcanti, Thomas Oberlin, Marie Chabert

This paper addresses the problem of unsupervisedly detecting changes between two observed images acquired by sensors of different modalities with possibly different resolutions.

Change Detection Dictionary Learning

Reconstruction of partially sampled multi-band images - Application to STEM-EELS imaging

no code implementations27 Feb 2018 Étienne Monier, Thomas Oberlin, Nathalie Brun, Marcel Tencé, Marta de Frutos, Nicolas Dobigeon

Electron microscopy has shown to be a very powerful tool to map the chemical nature of samples at various scales down to atomic resolution.

Negative Binomial Matrix Factorization for Recommender Systems

no code implementations5 Jan 2018 Olivier Gouvert, Thomas Oberlin, Cédric Févotte

We introduce negative binomial matrix factorization (NBMF), a matrix factorization technique specially designed for analyzing over-dispersed count data.

Binarization Recommendation Systems

Unmixing dynamic PET images with variable specific binding kinetics

no code implementations19 Jul 2017 Yanna Cruz Cavalcanti, Thomas Oberlin, Nicolas Dobigeon, Simon Stute, Maria Ribeiro, Clovis Tauber

Modeling the variability of the specific binding factor has a strong potential impact for dynamic PET image analysis.

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