Search Results for author: Robin Vogel

Found 8 papers, 2 papers with code

Fighting Selection Bias in Statistical Learning: Application to Visual Recognition from Biased Image Databases

no code implementations6 Sep 2021 Stephan Clémençon, Pierre Laforgue, Robin Vogel

In practice, and especially when training deep neural networks, visual recognition rules are often learned based on various sources of information.

Learning Theory Selection bias

A Multiclass Classification Approach to Label Ranking

no code implementations21 Feb 2020 Stephan Clémençon, Robin Vogel

However, in a wide variety of situations, the task targeted may be more ambitious, consisting in sorting all the possible label values $y$ that may be assigned to $X$ by decreasing order of the posterior probability $\eta_y(X)=\mathbb{P}\{Y=y \mid X \}$.

Classification General Classification +1

Learning Fair Scoring Functions: Bipartite Ranking under ROC-based Fairness Constraints

no code implementations19 Feb 2020 Robin Vogel, Aurélien Bellet, Stephan Clémençon

We establish generalization bounds for scoring functions learned under such constraints, design practical learning algorithms and show the relevance our approach with numerical experiments on real and synthetic data.

Fairness Generalization Bounds +1

Weighted Empirical Risk Minimization: Sample Selection Bias Correction based on Importance Sampling

no code implementations12 Feb 2020 Robin Vogel, Mastane Achab, Stéphan Clémençon, Charles Tillier

We consider statistical learning problems, when the distribution $P'$ of the training observations $Z'_1,\; \ldots,\; Z'_n$ differs from the distribution $P$ involved in the risk one seeks to minimize (referred to as the test distribution) but is still defined on the same measurable space as $P$ and dominates it.

Selection bias Transfer Learning

Weighted Empirical Risk Minimization: Transfer Learning based on Importance Sampling

no code implementations25 Sep 2019 Robin Vogel, Mastane Achab, Charles Tillier, Stéphan Clémençon

We consider statistical learning problems, when the distribution $P'$ of the training observations $Z'_1,\; \ldots,\; Z'_n$ differs from the distribution $P$ involved in the risk one seeks to minimize (referred to as the \textit{test distribution}) but is still defined on the same measurable space as $P$ and dominates it.

Transfer Learning

On Tree-based Methods for Similarity Learning

1 code implementation21 Jun 2019 Stéphan Clémençon, Robin Vogel

In many situations, the choice of an adequate similarity measure or metric on the feature space dramatically determines the performance of machine learning methods.

Trade-offs in Large-Scale Distributed Tuplewise Estimation and Learning

1 code implementation21 Jun 2019 Robin Vogel, Aurélien Bellet, Stephan Clémençon, Ons Jelassi, Guillaume Papa

The development of cluster computing frameworks has allowed practitioners to scale out various statistical estimation and machine learning algorithms with minimal programming effort.

BIG-bench Machine Learning Clustering +2

A Probabilistic Theory of Supervised Similarity Learning for Pointwise ROC Curve Optimization

no code implementations ICML 2018 Robin Vogel, Aurélien Bellet, Stéphan Clémençon

In this paper, similarity learning is investigated from the perspective of pairwise bipartite ranking, where the goal is to rank the elements of a database by decreasing order of the probability that they share the same label with some query data point, based on the similarity scores.

Metric Learning

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