Projected Block Coordinate Descent for sparse spike estimation.
| hal.structure.identifier | Institut de Mathématiques de Bordeaux [IMB] | |
| dc.contributor.author | BÉNARD, Pierre-Jean | |
| hal.structure.identifier | Institut de Mathématiques de Bordeaux [IMB] | |
| dc.contributor.author | TRAONMILIN, Yann | |
| hal.structure.identifier | Institut de Mathématiques de Bordeaux [IMB] | |
| dc.contributor.author | AUJOL, Jean François | |
| dc.date.accessioned | 2024-04-04T02:30:02Z | |
| dc.date.available | 2024-04-04T02:30:02Z | |
| dc.date.created | 2024-02-16 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/190230 | |
| dc.description.abstractEn | We consider the problem of recovering off-the-grid spikes from linear measurements. The state of the art Over-Parametrized Continuous Orthogonal Matching Pursuit (OP-COMP) with Projected Gradient Descent (PGD) successfully recovers those signals. In most cases, the main computational cost lies in a unique global descent on all parameters (positions and amplitudes). In this paper, we propose to improve this algorithm by accelerating this descent step. We introduce a new algorithm, based on Block Coordinate Descent, that takes advantages of the sparse structure of the problem. Based on qualitative theoretical results, this algorithm shows improvement in calculation times in realistic synthetic microscopy experiments. | |
| dc.description.sponsorship | Régularisation performante de problèmes inverses en grande dimension pour le traitement de données - ANR-20-CE40-0001 | |
| dc.language.iso | en | |
| dc.subject.en | spike super-resolution | |
| dc.subject.en | non-convex optimization | |
| dc.subject.en | over-parametrization | |
| dc.subject.en | block-coordinate descent | |
| dc.title.en | Projected Block Coordinate Descent for sparse spike estimation. | |
| dc.type | Document de travail - Pré-publication | |
| dc.subject.hal | Mathématiques [math]/Analyse numérique [math.NA] | |
| dc.subject.hal | Mathématiques [math]/Optimisation et contrôle [math.OC] | |
| dc.identifier.arxiv | 2402.12021 | |
| bordeaux.hal.laboratories | Institut de Mathématiques de Bordeaux (IMB) - UMR 5251 | * |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | Bordeaux INP | |
| bordeaux.institution | CNRS | |
| hal.identifier | hal-04462779 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-04462779v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=B%C3%89NARD,%20Pierre-Jean&TRAONMILIN,%20Yann&AUJOL,%20Jean%20Fran%C3%A7ois&rft.genre=preprint |
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