Pierre-Antoine Absil — accepted AI-conference papers

2024

Optimization without Retraction on the Random Generalized Stiefel Manifold

Simon Vary, Pierre Ablin, Bin Gao, Pierre-Antoine Absil

ICML 2024poster

Optimization over the set of matrices $X$ that satisfy $X^\top B X = I_p$, referred to as the generalized Stiefel manifold, appears in many applications involving sampled covariance matrices such as the canonical correlation analysis (CCA), independent component analysis (ICA), and the generalized e…

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2023

Low-Rank Plus Sparse Trajectory Decomposition for Direct Exoplanet Imaging

Simon Vary, Hazan Daglayan, Laurent Jacques, Pierre-Antoine Absil

ICASSP 2023accepted

We propose a direct imaging method for the detection of exo-planets based on a combined low-rank plus structured sparse model. For this task, we develop a dictionary of possible effective circular trajectories a planet can take during the observation time, elements of which can be efficiently comput…

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