Výsledky vyhledávání - "Hervé Carfantan"

Precession and obliquity forcing of the South African monsoon revealed by sub-tropical fires

Autor: Anne-Laure Daniau, Marie-France Loutre, Didier Swingedouw, Thomas Laepple, Franck Bassinot, Bruno Malaizé, Masa Kageyama, Karine Charlier, Hervé Carfantan

Publikováno v: Quaternary Science Reviews
Quaternary Science Reviews, 2023, 310, pp.108128. ⟨10.1016/j.quascirev.2023.108128⟩
Quaternary Science Reviews (0277-3791) (Elsevier BV), 2023-06, Vol. 310, P. 108128 (13p.)

While the influence of precession on monsoon at low latitudes through insolation forcing is well-known, the role of obliquity is still debated since its influence on the distribution of incoming solar radiation is small in these regions. In southern

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c01babf7b7f1c1666bdc23f56609dacc
https://hal.science/hal-04103901/file/1-s2.0-S0277379123001762-main.pdf

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Fast reconstruction of hyperspectral images from coded acquisitions using a separability assumption

Autor: Elizabeth Hemsley, Ibrahim Ardi, Tony Rouvier, Simon Lacroix, Hervé Carfantan, Antoine Monmayrant

Publikováno v: Optics Express
Optics Express, 2022, 30 (5), pp.8174-8185. ⟨10.1364/OE.448893⟩
Optics Express, Optical Society of America-OSA Publishing, 2022, 30 (5), pp.8174-8185. ⟨10.1364/OE.448893⟩

We present a fast reconstruction algorithm for hyperspectral images, utilizing a small amount of data without the need for any training. The method is implemented with a dual disperser hyperspectral imager and makes use of spatial-spectral correlatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18470498d183b78368c80ba5ff910776
https://hal.science/hal-03610209v2/document

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Fast, Frugal Image Reconstruction with a Dual Disperser Hyperspectral Imager

Autor: Antoine Monmayrant, Hervé Carfantan, Ibrahim Ardi, Elizabeth Hemsley, Simon Lacroix

Publikováno v: 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Jun 2021, Munich, Germany. pp.1-1, ⟨10.1109/CLEO/Europe-EQEC52157.2021.9542719⟩

International audience; Recently we demonstrated the reconstruction of a hyperspectral datacube with 110 wavelength bands from 10 camera acquisitions [1] . The implementation of this scheme, similarly to compressed sensing, relies on spatial- spectra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83c6ea0263bc688fb5638be74fbd394f
https://hal.laas.fr/hal-03407756

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A Partially Collapsed Gibbs Sampler for Unsupervised Nonnegative Sparse Signal Restoration

Autor: Hervé Carfantan, Jérôme Idier, Mehdi Chahine Amrouche

Publikováno v: ICASSP 2021-2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
ICASSP 2021-2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Jun 2021, Toronto, Canada. pp.5519-5523, ⟨10.1109/icassp39728.2021.9414293⟩
ICASSP

International audience; In this paper the problem of restoration of unsupervised nonnegative sparse signals is addressed in the Bayesian framework. We introduce a new probabilistic hierarchical prior, based on the Generalized Hyperbolic (GH) distribu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8b42be55e1178e413a1f657f5104f30
https://hal.science/hal-03227140/document

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Optimized coded aperture for frugal hyperspectral image recovery using a dual-disperser system

Autor: Ibrahim Ardi, Antoine Monmayrant, Hervé Carfantan, Elizabeth Hemsley, Simon Lacroix

Publikováno v: Journal of the Optical Society of America. A, Optics and image science
Journal of the Optical Society of America. A, Optics and image science, Optical Society of America, 2020, 37 (12), pp.1916-1926. ⟨10.1364/JOSAA.403594⟩
Journal of the Optical Society of America. A, Optics and image science, 2020, 37 (12), pp.1916-1926. ⟨10.1364/JOSAA.403594⟩

International audience; We present a novel acquisition scheme based on a dual disperser architecture, which can reconstruct a hyperspectral data cube using many times fewer acquisitions than spectral bands. The reconstruction algorithm follows a quad

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31465a2483eef4dc7cfdaf03702c4f0e
https://hal.laas.fr/hal-02993037

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Sparse Branch and Bound for Exact Optimization of L0-Norm Penalized Least Squares

Autor: Marcel Mongeau, Sébastien Bourguignon, Jordan Ninin, Hervé Carfantan, Ramzi Ben Mhenni

Publikováno v: ICASSP
ICASSP 2020, IEEE International Conference on Acoustics, Speech and Signal Processing
ICASSP 2020, IEEE International Conference on Acoustics, Speech and Signal Processing, May 2020, Barcelona, Spain. pp.ISBN: 978-1-5090-6632-2, ⟨10.1109/ICASSP40776.2020.9053870⟩

International audience; We propose a global optimization approach to solve ℓ 0 -norm penalized least-squares problems, using a dedicated branch-and-bound methodology. A specific tree search strategy is built, with branching rules inspired from gree

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f19c843e21b4817242bd7112dbc08506
https://doi.org/10.1109/icassp40776.2020.9053870

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The SparSpec algorithm and the application to the detection of spatial periodicities in tokamaks: using memory with relaxation *

Autor: L. M. Perrone, Duccio Testa, Hervé Carfantan

Publikováno v: Plasma Research Express. 3:025006

A common problem in many complex physical systems is the determination of pulsation modes from irregularly sampled time-series, and there is a wealth of signal processing techniques that are being applied to post-pulse and real-time data analysis in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::393c9c9bd0351ebbf6114802d16c26c0
https://doi.org/10.1088/2516-1067/abf947

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The SparSpec algorithm and the application to the detection of spatial periodicities in tokamaks: error weighting the penalization criterion to improve the performance of the algorithm *

Autor: L M Perrone, Hervé Carfantan, Duccio Testa

Publikováno v: Plasma Research Express. 3:025005

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::833e68aaf8697d9df8fcd143fd996e39
https://doi.org/10.1088/2516-1067/abf946

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Calibration of programmable spectral imager with dual disperser architecture

Autor: Antoine Monmayrant, Hervé Carfantan, Simon Lacroix, Elizabeth Hemsley

Publikováno v: Optics Communications
Optics Communications, Elsevier, 2020, 468, pp.125767. ⟨10.1016/j.optcom.2020.125767⟩
Optics Communications, 2020, 468, pp.125767. ⟨10.1016/j.optcom.2020.125767⟩

International audience; We present a hyperspectral imager with a dual disperser architecture, which is highly re-configurable thanks to the use of a digital micro-mirror device (DMD). The system has over 200 spectral bands in the range 400-700 nm, an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b4b83fa80cdee60f02bf58b5ca265ab
https://doi.org/10.1016/j.optcom.2020.125767

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Fast hyperspectral cube reconstruction for a double disperser imager

Autor: Hervé Carfantan, Ibrahim Ardi, Simon Lacroix, Antoine Monmayrant

Publikováno v: 26th European Signal Processing Conference (EUSIPCO 2018)
26th European Signal Processing Conference (EUSIPCO 2018), Sep 2018, Roma, Italy
9th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)
9th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), Sep 2018, Amsterdam, Netherlands
EUSIPCO

International audience; We consider the problem of hyperspectral cube reconstruction with a new controllable imaging system. The reconstruction with a small number of images acquired with different configurations of the imager avoids a complete scann

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07a06959b01a70a2eb0f4c352520ca2d
https://hal.laas.fr/hal-01852173/file/Ardi_Eusipco2018.pdf

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