Super-resolution in map-making based on a physical instrument model and regularized inversion. Application to SPIRE/Herschel. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2012

Super-resolution in map-making based on a physical instrument model and regularized inversion. Application to SPIRE/Herschel.

Résumé

We investigate super-resolution methods for image reconstruction from data provided by a family of scanning instruments like the Herschel observatory. To do this, we constructed a model of the instrument that faithfully reflects the physical reality, accurately taking the acquisition process into account to explain the data in a reliable manner. The inversion, \ie the image reconstruction process, is based on a linear approach resulting from a quadratic regularized criterion and numerical optimization tools. The application concerns the reconstruction of maps for the SPIRE instrument of the Herschel observatory. The numerical evaluation uses simulated and real data to compare the standard tool (coaddition) and the proposed method. The inversion approach is capable to restore spatial frequencies over a bandwidth four times that possible with coaddition and thus to correctly show details invisible on standard maps. The approach is also applied to real data with significant improvement in spatial resolution.
Fichier principal
Vignette du fichier
AA1.pdf (206.99 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00674514 , version 1 (08-03-2012)

Identifiants

Citer

François Orieux, Jean-François Giovannelli, Thomas Rodet, Alain Abergel, H Ayasso, et al.. Super-resolution in map-making based on a physical instrument model and regularized inversion. Application to SPIRE/Herschel.. Astronomy and Astrophysics - A&A, 2012, pp.38. ⟨10.1051/0004-6361/201116817⟩. ⟨hal-00674514⟩
274 Consultations
155 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More