Publications

Signal and Image processing

Les traces de compression pour détecter les photomontages

Les réseaux sociaux, comme Facebook, Twitter, Instagram, WhatsApp et tant d'autres, permettent de partager des images massivement et rapidement. Ces images sont parfois utilisées en tant que « preuve » pour accompagner une information. Mais alors…

Tina Nikoukhah

Interstices - 2021

Statistics

Bayesian Feature Discovery for Predictive Maintenance

This paper considers predictive maintenance, which is the task of predicting rare and anomalous events (typically, system failures) using event logs data, which are series of timestamped symbolic codes emitted at regular or irregular intervals by a…

Amir Dib, Charles Truong, Laurent Oudre, Mathilde Mougeot, Nicolas Vayatis, Heloïse Nonne

Geriatry and gerontology

Revealing posturographic profile of patients with Parkinsonian syndromes through a novel hypothesis testing framework based on machine learning

Ioannis Bargiotas, Argyris Kalogeratos, Myrto Limnios, Pierre-Paul Vidal, Damien Ricard, Nicolas Vayatis

PLoS ONE - 2021

Plasmas

Stability of ablation flows in inertial confinement fusion: non-modal effects

Fast transient growth of hydrodynamic perturbations due to non-modal effects is shown to be possible in an ablation flow relevant to inertial confinement fusion (ICF). Likely to arise in capsule ablators with material inhomogeneities, such growths…

G Varillon, J.-M Clarisse, A. Couairon

Physical Review E - 2021

Mathematics

Regularizing effect and decay results for a parabolic problem with repulsive superlinear first order terms

Martina Magliocca

RACSAM. Real Academia de Ciencias. Serie A, Matemáticas - Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A, Matemáticas - 2021

Information Theory

Calcul Haute Performance : Caractérisation d’architectures et optimisation d’applications pour les futures générations de supercalculateurs

Information systems and High-Performance Computing (HPC) infrastructures play an active role in the improvement of scientific knowledge and the evolution of our societies. The field of HPC is expanding rapidly and users need increasingly powerful…

Jean Pourroy

Spectral Theory

A Spectral Approach of Multi-Scale Metamodelling Applied to Acoustic Propagation

There exists many numerical methods to simulate wave propagation through complex media with a very good precision. However, taking into account the fluctuations of the propagation medium necessitates a statistical approach implying a prohibitive…

Alexandre Goupy

Probability

DISCRETE STICKY COUPLING OF FUNCTIONAL AUTOREGRESSIVE PROCESSES

In this paper, we provide bounds in various metrics between the successive iterates of two functional autoregressive processes with isotropic Gaussian noise of the form $Y_{k+1}=T_\gamma(Y_k)+\sqrt{\gamma\sigma^2}Z_{k+1}$ and $\tilde Y_{k+1}=\tilde…

Alain Durmus, Andreas Eberle, Aurélien Enfroy, Arnaud Guillin, Pierre Monmarché

Computer Vision and Pattern Recognition

Robust Rational Polynomial Camera Modelling for SAR and Pushbroom Imaging

The Rational Polynomial Camera (RPC) model can be used to describe a variety of image acquisition systems in remote sensing, notably optical and Synthetic Aperture Radar (SAR) sensors. RPC functions relate 3D to 2D coordinates and vice versa,…

Roland Akiki, Roger Marí, Carlo de Franchis, Jean-Michel Morel, Gabriele Facciolo

Image Processing

A COMPARATIVE STUDY OF DERAMPING TECHNIQUES FOR SENTINEL-1 TOPS IN THE CONTEXT OF INTERFEROMETRY

In this study, we compare the different spectral centering methods (referred to as deramping) for the Sentinel-1 images acquired with the TOPSAR method, in the context of interferometry. The deramping is a necessary step prior to image interpolation…

Roland Akiki, Raphaël Grandin, Carlo de Franchis, Gabriele Facciolo, Jean-Michel Morel