Search Results for author: Nathanaël Perraudin

Found 21 papers, 12 papers with code

Efficient and Scalable Graph Generation through Iterative Local Expansion

1 code implementation14 Dec 2023 Andreas Bergmeister, Karolis Martinkus, Nathanaël Perraudin, Roger Wattenhofer

However, most existing methods struggle with large graphs due to the complexity of representing the entire joint distribution across all node pairs and capturing both global and local graph structures simultaneously.

Denoising Graph Generation

Diffusion Models for Graphs Benefit From Discrete State Spaces

1 code implementation4 Oct 2022 Kilian Konstantin Haefeli, Karolis Martinkus, Nathanaël Perraudin, Roger Wattenhofer

Denoising diffusion probabilistic models and score-matching models have proven to be very powerful for generative tasks.

Denoising

What You See is What You Classify: Black Box Attributions

1 code implementation23 May 2022 Steven Stalder, Nathanaël Perraudin, Radhakrishna Achanta, Fernando Perez-Cruz, Michele Volpi

These attributions are provided in the form of masks that only show the classifier-relevant parts of an image, masking out the rest.

SPECTRE: Spectral Conditioning Helps to Overcome the Expressivity Limits of One-shot Graph Generators

1 code implementation4 Apr 2022 Karolis Martinkus, Andreas Loukas, Nathanaël Perraudin, Roger Wattenhofer

We approach the graph generation problem from a spectral perspective by first generating the dominant parts of the graph Laplacian spectrum and then building a graph matching these eigenvalues and eigenvectors.

Graph Generation Graph Matching

A data acquisition setup for data driven acoustic design

no code implementations24 Sep 2021 Romana Rust, Achilleas Xydis, Kurt Heutschi, Nathanaël Perraudin, Gonzalo Casas, Chaoyu Du, Jürgen Strauss, Kurt Eggenschwiler, Fernando Perez-Cruz, Fabio Gramazio, Matthias Kohler

In this paper, we present the automated data acquisition setup, the data processing and the computational generation of diffusive surface structures.

DeepSphere: a graph-based spherical CNN

9 code implementations ICLR 2020 Michaël Defferrard, Martino Milani, Frédérick Gusset, Nathanaël Perraudin

DeepSphere, a method based on a graph representation of the sampled sphere, strikes a controllable balance between these two desiderata.

Scalable Graph Networks for Particle Simulations

1 code implementation14 Oct 2020 Karolis Martinkus, Aurelien Lucchi, Nathanaël Perraudin

However, the dynamics of many real-world systems are challenging to learn due to the presence of nonlinear potentials and a number of interactions that scales quadratically with the number of particles $N$, as in the case of the N-body problem.

GACELA -- A generative adversarial context encoder for long audio inpainting

2 code implementations11 May 2020 Andres Marafioti, Piotr Majdak, Nicki Holighaus, Nathanaël Perraudin

We introduce GACELA, a generative adversarial network (GAN) designed to restore missing musical audio data with a duration ranging between hundreds of milliseconds to a few seconds, i. e., to perform long-gap audio inpainting.

Audio Generation Audio inpainting +1

Emulation of cosmological mass maps with conditional generative adversarial networks

no code implementations17 Apr 2020 Nathanaël Perraudin, Sandro Marcon, Aurelien Lucchi, Tomasz Kacprzak

Weak gravitational lensing mass maps play a crucial role in understanding the evolution of structures in the universe and our ability to constrain cosmological models.

MS-SSIM SSIM

Cosmological N-body simulations: a challenge for scalable generative models

1 code implementation15 Aug 2019 Nathanaël Perraudin, Ankit Srivastava, Aurelien Lucchi, Tomasz Kacprzak, Thomas Hofmann, Alexandre Réfrégier

Our results show that the proposed model produces samples of high visual quality, although the statistical analysis reveals that capturing rare features in the data poses significant problems for the generative models.

Discriminative structural graph classification

no code implementations31 May 2019 Younjoo Seo, Andreas Loukas, Nathanaël Perraudin

This paper focuses on the discrimination capacity of aggregation functions: these are the permutation invariant functions used by graph neural networks to combine the features of nodes.

General Classification Graph Classification

Audio inpainting of music by means of neural networks

1 code implementation29 Oct 2018 Andrés Marafioti, Nicki Holighaus, Piotr Majdak, Nathanaël Perraudin

We studied the ability of deep neural networks (DNNs) to restore missing audio content based on its context, a process usually referred to as audio inpainting.

Audio Generation Audio inpainting

Large Scale Graph Learning from Smooth Signals

no code implementations ICLR 2019 Vassilis Kalofolias, Nathanaël Perraudin

In this paper, we show how to scale it, obtaining an approximation with leading cost of $\mathcal{O}(n\log(n))$, with quality that approaches the exact graph learning model.

Graph Learning

A Time-Vertex Signal Processing Framework

no code implementations5 May 2017 Francesco Grassi, Andreas Loukas, Nathanaël Perraudin, Benjamin Ricaud

An emerging way to deal with high-dimensional non-euclidean data is to assume that the underlying structure can be captured by a graph.

Denoising Video Inpainting

Compressive Embedding and Visualization using Graphs

no code implementations19 Feb 2017 Johan Paratte, Nathanaël Perraudin, Pierre Vandergheynst

Visualizing high-dimensional data has been a focus in data analysis communities for decades, which has led to the design of many algorithms, some of which are now considered references (such as t-SNE for example).

Stationary time-vertex signal processing

no code implementations1 Nov 2016 Andreas Loukas, Nathanaël Perraudin

This paper considers regression tasks involving high-dimensional multivariate processes whose structure is dependent on some {known} graph topology.

Denoising

Stationary signal processing on graphs

no code implementations11 Jan 2016 Nathanaël Perraudin, Pierre Vandergheynst

Graphs are a central tool in machine learning and information processing as they allow to conveniently capture the structure of complex datasets.

Denoising Translation

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