Search Results for author: Benjamin Negrevergne

Found 15 papers, 3 papers with code

Exploring Precision and Recall to assess the quality and diversity of LLMs

no code implementations16 Feb 2024 Florian Le Bronnec, Alexandre Verine, Benjamin Negrevergne, Yann Chevaleyre, Alexandre Allauzen

This paper introduces a novel evaluation framework for Large Language Models (LLMs) such as Llama-2 and Mistral, focusing on the adaptation of Precision and Recall metrics from image generation to text generation.

Image Generation Text Generation

Optimal Budgeted Rejection Sampling for Generative Models

no code implementations1 Nov 2023 Alexandre Verine, Muni Sreenivas Pydi, Benjamin Negrevergne, Yann Chevaleyre

Rejection sampling methods have recently been proposed to improve the performance of discriminator-based generative models.

Image Generation

Adversarial attacks for mixtures of classifiers

no code implementations20 Jul 2023 Lucas Gnecco Heredia, Benjamin Negrevergne, Yann Chevaleyre

However, it has been shown that existing attacks are not well suited for this kind of classifiers.

Training Normalizing Flows with the Precision-Recall Divergence

no code implementations1 Feb 2023 Alexandre Verine, Benjamin Negrevergne, Muni Sreenivas Pydi, Yann Chevaleyre

Generative models can have distinct mode of failures like mode dropping and low quality samples, which cannot be captured by a single scalar metric.

On the expressivity of bi-Lipschitz normalizing flows

no code implementations ICML Workshop INNF 2021 Alexandre Verine, Benjamin Negrevergne, Fabrice Rossi, Yann Chevaleyre

An invertible function is bi-Lipschitz if both the function and its inverse have bounded Lipschitz constants.

Advocating for Multiple Defense Strategies against Adversarial Examples

no code implementations4 Dec 2020 Alexandre Araujo, Laurent Meunier, Rafael Pinot, Benjamin Negrevergne

It has been empirically observed that defense mechanisms designed to protect neural networks against $\ell_\infty$ adversarial examples offer poor performance against $\ell_2$ adversarial examples and vice versa.

On Lipschitz Regularization of Convolutional Layers using Toeplitz Matrix Theory

2 code implementations15 Jun 2020 Alexandre Araujo, Benjamin Negrevergne, Yann Chevaleyre, Jamal Atif

This paper tackles the problem of Lipschitz regularization of Convolutional Neural Networks.

The Expressive Power of Deep Neural Networks with Circulant Matrices

no code implementations ICLR 2019 Alexandre Araujo, Benjamin Negrevergne, Yann Chevaleyre, Jamal Atif

Recent results from linear algebra stating that any matrix can be decomposed into products of diagonal and circulant matrices has lead to the design of compact deep neural network architectures that perform well in practice.

General Classification Video Classification

Robust Neural Networks using Randomized Adversarial Training

no code implementations25 Mar 2019 Alexandre Araujo, Laurent Meunier, Rafael Pinot, Benjamin Negrevergne

This paper tackles the problem of defending a neural network against adversarial attacks crafted with different norms (in particular $\ell_\infty$ and $\ell_2$ bounded adversarial examples).

Understanding and Training Deep Diagonal Circulant Neural Networks

no code implementations29 Jan 2019 Alexandre Araujo, Benjamin Negrevergne, Yann Chevaleyre, Jamal Atif

In this paper, we study deep diagonal circulant neural networks, that is deep neural networks in which weight matrices are the product of diagonal and circulant ones.

Video Classification

A SAT model to mine flexible sequences in transactional datasets

no code implementations1 Apr 2016 Rémi Coletta, Benjamin Negrevergne

Traditional pattern mining algorithms generally suffer from a lack of flexibility.

Constraint-based sequence mining using constraint programming

no code implementations6 Jan 2015 Benjamin Negrevergne, Tias Guns

We investigate the use of constraint programming as general framework for this task.

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