The PRIMO Group is proud to announce the next talk of the 2023-2024 season of the “PRIMO Talk” series.
The seminar will be held on Monday December 4, 2023 at 5pm (CET).
Speaker: Guillaume Lauga (École Normale Supérieure de Lyon)
Title: Multilevel Proximal Algorithm: Application to Image Restoration
Abstract:
Solving large scale optimization problems is a challenging task and exploiting their structure can alleviate its computational cost. In this work, we focus on multiresolution structure at the core of multilevel optimization methods. These approaches leverage the definition of coarse approximations of the objective function to minimize it. In this talk, we present a multilevel proximal algorithm IML FISTA, Inexact Multilevel FISTA, applicable to solve composite optimization problem which are not proximable exactly for their non-smooth part. The proposed method is then applied to solve problems with TV and NLTV penalizations and its effectiveness is illustrated on color and hyperspectral images reconstruction problems.
The Zoom link to the event will be shared through the PRIMO mailing list and other related mailing lists.
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