1 code implementation • 31 Jan 2024 • Blaise Delattre, Quentin Barthélemy, Alexandre Allauzen
This paper leverages the use of \emph{Gram iteration} an efficient, deterministic, and differentiable method for computing spectral norm with an upper bound guarantee.
no code implementations • 28 Sep 2023 • Blaise Delattre, Alexandre Araujo, Quentin Barthélemy, Alexandre Allauzen
The certified radius in this context is a crucial indicator of the robustness of models.
1 code implementation • 25 May 2023 • Blaise Delattre, Quentin Barthélemy, Alexandre Araujo, Alexandre Allauzen
Since the control of the Lipschitz constant has a great impact on the training stability, generalization, and robustness of neural networks, the estimation of this value is nowadays a real scientific challenge.
1 code implementation • 15 Mar 2022 • Quentin Barthélemy, Sylvain Chevallier, Raphaëlle Bertrand-Lalo, Pierre Clisson
In brain-computer interfaces (BCI), most of the approaches based on event-related potential (ERP) focus on the detection of P300, aiming for single trial classification for a speller task.
no code implementations • 23 Nov 2021 • Salim Khazem, Sylvain Chevallier, Quentin Barthélemy, Karim Haroun, Camille Noûs
Calibration is still an important issue for user experience in Brain-Computer Interfaces (BCI).
no code implementations • 29 Sep 2016 • Yoann Isaac, Quentin Barthélemy, Cédric Gouy-Pailler, Michèle Sebag, Jamal Atif
This paper addresses the structurally-constrained sparse decomposition of multi-dimensional signals onto overcomplete families of vectors, called dictionaries.
2 code implementations • Neurocomputing 2016 • Emmanuel Kalunga, Sylvain Chevallier, Quentin Barthélemy, Karim Djouani, Eric Monacelli, Yskandar Hamam
We propose a novel algorithm for online and asynchronous processing of brain signals, borrowing principles from semi-unsupervised approaches and following a dynamic stopping scheme to provide a prediction as soon as possible.
1 code implementation • Geometric Science of Information 2016 • Emmanuel Kalunga, Sylvain Chevallier, Quentin Barthélemy, Karim Djouani, Yskandar Hamam, Eric Monacelli
Brain Computer Interfaces (BCI) based on electroencephalog-raphy (EEG) rely on multichannel brain signal processing.
1 code implementation • EUSIPCO 2014 • Sylvain Chevallier, Quentin Barthélemy, Jamal Atif
Dictionary-based approaches are the focus of a growing attention in the signal processing community, often achieving state of the art results in several application fields.
1 code implementation • ICASSP 2014 • Sylvain Chevallier, Quentin Barthélemy, Jamal Atif
Overcomplete representations and dictionary learning algorithms are attracting a growing interest in the machine learning community.
no code implementations • 21 Mar 2013 • Yoann Isaac, Quentin Barthélemy, Jamal Atif, Cédric Gouy-Pailler, Michèle Sebag
An extensive empirical evaluation shows how the proposed approach compares to the state of the art depending on the signal features.
1 code implementation • 18 Feb 2013 • Sylvain Chevallier, Quentin Barthélemy, Jamal Atif
Despite a recurrent need to rely on a distance for learning or assessing multivariate overcomplete representations, no metrics in their underlying spaces have yet been proposed.