Search Results for author: Gilles Gasso

Found 27 papers, 9 papers with code

Gaussian-Smoothed Sliced Probability Divergences

no code implementations4 Apr 2024 Mokhtar Z. Alaya, Alain Rakotomamonjy, Maxime Berar, Gilles Gasso

We particularly focus on the Gaussian smoothed sliced Wasserstein distance and prove that it converges with a rate $O(n^{-1/2})$.

Domain Adaptation Privacy Preserving

Adversarial Semi-Supervised Domain Adaptation for Semantic Segmentation: A New Role for Labeled Target Samples

no code implementations12 Dec 2023 Marwa Kechaou, Mokhtar Z. Alaya, Romain Hérault, Gilles Gasso

Adversarial learning baselines for domain adaptation (DA) approaches in the context of semantic segmentation are under explored in semi-supervised framework.

Domain Adaptation Semantic Segmentation +1

Fast Optimal Transport through Sliced Wasserstein Generalized Geodesics

1 code implementation4 Jul 2023 Guillaume Mahey, Laetitia Chapel, Gilles Gasso, Clément Bonet, Nicolas Courty

Wasserstein distance (WD) and the associated optimal transport plan have been proven useful in many applications where probability measures are at stake.

Colorization Image Colorization

Statistical and Topological Properties of Gaussian Smoothed Sliced Probability Divergences

no code implementations20 Oct 2021 Alain Rakotomamonjy, Mokhtar Z. Alaya, Maxime Berar, Gilles Gasso

In this paper, we analyze the theoretical properties of this distance as well as those of generalized versions denoted as Gaussian smoothed sliced divergences.

Domain Adaptation Privacy Preserving

Unbalanced Optimal Transport through Non-negative Penalized Linear Regression

1 code implementation NeurIPS 2021 Laetitia Chapel, Rémi Flamary, Haoran Wu, Cédric Févotte, Gilles Gasso

In particular, we consider majorization-minimization which leads in our setting to efficient multiplicative updates for a variety of penalties.

regression

Heterogeneous Wasserstein Discrepancy for Incomparable Distributions

no code implementations4 Jun 2021 Mokhtar Z. Alaya, Gilles Gasso, Maxime Berar, Alain Rakotomamonjy

We provide a theoretical analysis of this new divergence, called $\textit{heterogeneous Wasserstein discrepancy (HWD)}$, and we show that it preserves several interesting properties including rotation-invariance.

From SIR to SEAIRD: a novel data-driven modeling approach based on the Grey-box System Theory to predict the dynamics of COVID-19

no code implementations29 May 2021 Komi Midzodzi Pékpé, Djamel Zitouni, Gilles Gasso, Wajdi Dhifli, Benjamin C. Guinhouya

When applied to Brazil's cases, SEAIRD produced an excellent agreement to the data, with an %coefficient of determination $R^2$ $\geq 90\%$.

Partial Optimal Tranport with applications on Positive-Unlabeled Learning

no code implementations NeurIPS 2020 Laetitia Chapel, Mokhtar Z. Alaya / Laboratoire LITIS, Université de Rouen Normandie, Gilles Gasso

Classical optimal transport problem seeks a transportation map that preserves the total mass between two probability distributions, requiring their masses to be equal.

Open Set Domain Adaptation using Optimal Transport

no code implementations2 Oct 2020 Marwa Kechaou, Romain Hérault, Mokhtar Z. Alaya, Gilles Gasso

We present a 2-step optimal transport approach that performs a mapping from a source distribution to a target distribution.

Domain Adaptation

Provably Convergent Working Set Algorithm for Non-Convex Regularized Regression

no code implementations24 Jun 2020 Alain Rakotomamonjy, Rémi Flamary, Gilles Gasso, Joseph Salmon

Owing to their statistical properties, non-convex sparse regularizers have attracted much interest for estimating a sparse linear model from high dimensional data.

regression

Optimal Transport for Conditional Domain Matching and Label Shift

1 code implementation15 Jun 2020 Alain Rakotomamonjy, Rémi Flamary, Gilles Gasso, Mokhtar Z. Alaya, Maxime Berar, Nicolas Courty

We address the problem of unsupervised domain adaptation under the setting of generalized target shift (joint class-conditional and label shifts).

Unsupervised Domain Adaptation

Object Detection in the DCT Domain: is Luminance the Solution?

3 code implementations10 Jun 2020 Benjamin Deguerre, Clement Chatelain, Gilles Gasso

To gain in efficiency, this paper proposes to take advantage of the compressed representation of images to carry out object detection usable in constrained resources conditions.

Object object-detection +1

Foreground-Background Ambient Sound Scene Separation

no code implementations11 May 2020 Michel Olvera, Emmanuel Vincent, Romain Serizel, Gilles Gasso

Ambient sound scenes typically comprise multiple short events occurring on top of a somewhat stationary background.

Theoretical Guarantees for Bridging Metric Measure Embedding and Optimal Transport

no code implementations19 Feb 2020 Mokhtar Z. Alaya, Maxime Bérar, Gilles Gasso, Alain Rakotomamonjy

Unlike Gromov-Wasserstein (GW) distance which compares pairwise distances of elements from each distribution, we consider a method allowing to embed the metric measure spaces in a common Euclidean space and compute an optimal transport (OT) on the embedded distributions.

Partial Optimal Transport with Applications on Positive-Unlabeled Learning

3 code implementations19 Feb 2020 Laetitia Chapel, Mokhtar Z. Alaya, Gilles Gasso

In this paper, we address the partial Wasserstein and Gromov-Wasserstein problems and propose exact algorithms to solve them.

Pixel-wise Conditioned Generative Adversarial Networks for Image Synthesis and Completion

no code implementations4 Feb 2020 Cyprien Ruffino, Romain Hérault, Eric Laloy, Gilles Gasso

We investigate the influence of this regularization term on the quality of the generated images and the fulfillment of the given pixel constraints.

Image Inpainting

Pixel-wise Conditioning of Generative Adversarial Networks

1 code implementation2 Nov 2019 Cyprien Ruffino, Romain Hérault, Eric Laloy, Gilles Gasso

In this paper, we study the effectiveness of conditioning GANs by adding an explicit regularization term to enforce pixel-wise conditions when very few pixel values are provided.

Image Inpainting

Dilated Spatial Generative Adversarial Networks for Ergodic Image Generation

no code implementations15 May 2019 Cyprien Ruffino, Romain Hérault, Eric Laloy, Gilles Gasso

In combination with convolutional (for the discriminator) and de-convolutional (for the generator) layers, they are particularly suitable for image generation, especially of natural scenes.

Image Generation

Fast object detection in compressed JPEG Images

2 code implementations16 Apr 2019 Benjamin Deguerre, Clément Chatelain, Gilles Gasso

Object detection in still images has drawn a lot of attention over past few years, and with the advent of Deep Learning impressive performances have been achieved with numerous industrial applications.

Object object-detection +1

Screening Rules for Lasso with Non-Convex Sparse Regularizers

no code implementations16 Feb 2019 Alain Rakotomamonjy, Gilles Gasso, Joseph Salmon

Leveraging on the convexity of the Lasso problem , screening rules help in accelerating solvers by discarding irrelevant variables, during the optimization process.

Gradient-based deterministic inversion of geophysical data with Generative Adversarial Networks: is it feasible?

1 code implementation21 Dec 2018 Eric Laloy, Niklas Linde, Cyprien Ruffino, Romain Hérault, Gilles Gasso, Diedrik Jacques

Global probabilistic inversion within the latent space learned by Generative Adversarial Networks (GAN) has been recently demonstrated (Laloy et al., 2018).

Geophysics

An efficient supervised dictionary learning method for audio signal recognition

no code implementations12 Dec 2018 Imad Rida, Romain Hérault, Gilles Gasso

Motivated by this need of a principled framework across domain applications for machine listening, we propose a generic and data-driven representation learning approach.

Audio Signal Recognition Chord Recognition +3

Importance sampling strategy for non-convex randomized block-coordinate descent

no code implementations23 Jun 2016 Rémi Flamary, Alain Rakotomamonjy, Gilles Gasso

As the number of samples and dimensionality of optimization problems related to statistics an machine learning explode, block coordinate descent algorithms have gained popularity since they reduce the original problem to several smaller ones.

Histogram of gradients of Time-Frequency Representations for Audio scene detection

no code implementations20 Aug 2015 Alain Rakotomamonjy, Gilles Gasso

This paper addresses the problem of audio scenes classification and contributes to the state of the art by proposing a novel feature.

General Classification Scene Classification

DC Proximal Newton for Non-Convex Optimization Problems

no code implementations2 Jul 2015 Alain Rakotomamonjy, Remi Flamary, Gilles Gasso

We introduce a novel algorithm for solving learning problems where both the loss function and the regularizer are non-convex but belong to the class of difference of convex (DC) functions.

Transductive Learning

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