Search Results for author: Alexia Jolicoeur-Martineau

Found 15 papers, 11 papers with code

On Relativistic f-Divergences

1 code implementation ICML 2020 Alexia Jolicoeur-Martineau

We take a more rigorous look at Relativistic Generative Adversarial Networks (RGANs) and prove that the objective function of the discriminator is a statistical divergence for any concave function $f$ with minimal properties ($f(0)=0$, $f'(0) \neq 0$, $\sup_x f(x)>0$).

Generating and Imputing Tabular Data via Diffusion and Flow-based Gradient-Boosted Trees

2 code implementations18 Sep 2023 Alexia Jolicoeur-Martineau, Kilian Fatras, Tal Kachman

Through empirical evaluation across the benchmark, we demonstrate that our approach outperforms deep-learning generation methods in data generation tasks and remains competitive in data imputation.

Imputation

Diffusion models with location-scale noise

no code implementations12 Apr 2023 Alexia Jolicoeur-Martineau, Kilian Fatras, Ke Li, Tal Kachman

Diffusion Models (DMs) are powerful generative models that add Gaussian noise to the data and learn to remove it.

PopulAtion Parameter Averaging (PAPA)

1 code implementation6 Apr 2023 Alexia Jolicoeur-Martineau, Emy Gervais, Kilian Fatras, Yan Zhang, Simon Lacoste-Julien

Based on this idea, we propose PopulAtion Parameter Averaging (PAPA): a method that combines the generality of ensembling with the efficiency of weight averaging.

Gotta Go Fast with Score-Based Generative Models

no code implementations NeurIPS Workshop DLDE 2021 Alexia Jolicoeur-Martineau, Ke Li, Rémi Piché-Taillefer, Tal Kachman, Ioannis Mitliagkas

Score-based (denoising diffusion) generative models have recently gained a lot of success in generating realistic and diverse data.

Denoising

Gotta Go Fast When Generating Data with Score-Based Models

1 code implementation28 May 2021 Alexia Jolicoeur-Martineau, Ke Li, Rémi Piché-Taillefer, Tal Kachman, Ioannis Mitliagkas

For high-resolution images, our method leads to significantly higher quality samples than all other methods tested.

Ranked #8 on Image Generation on CIFAR-10 (Inception score metric)

Image Generation

Gradient penalty from a maximum margin perspective

2 code implementations15 Oct 2019 Alexia Jolicoeur-Martineau, Ioannis Mitliagkas

We present a unifying framework of expected margin maximization and show that a wide range of gradient-penalized GANs (e. g., Wasserstein, Standard, Least-Squares, and Hinge GANs) can be derived from this framework.

Image Generation

On Relativistic $f$-Divergences

1 code implementation8 Jan 2019 Alexia Jolicoeur-Martineau

Given the good performance of RGANs, this suggests that WGAN does not performs well primarily because of the weak metric, but rather because of regularization and the use of a relativistic discriminator.

GANs beyond divergence minimization

1 code implementation6 Sep 2018 Alexia Jolicoeur-Martineau

We observe that most loss functions converge well and provide comparable data generation quality to non-saturating GAN, LSGAN, and WGAN-GP generator loss functions, whether we use divergences or non-divergences.

The relativistic discriminator: a key element missing from standard GAN

10 code implementations ICLR 2019 Alexia Jolicoeur-Martineau

We show that this property can be induced by using a relativistic discriminator which estimate the probability that the given real data is more realistic than a randomly sampled fake data.

Generative Adversarial Network Image Generation

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