Fast Sky to Sky Interpolation for Radio Interferometric Imaging - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Fast Sky to Sky Interpolation for Radio Interferometric Imaging

Résumé

Reconstruction of radio interferometric images requires the processing of data in Fourier space that dot not have regular coordinates, preventing direct use of the Fast Fourier Transform. The most common solution is to rely on interpolation algorithms, called gridding, that are computationally expensive. In this paper, we propose an algorithmic reinterpretation, named sky to sky method, to reduce the computation cost of the gridding operation and its adjoint, the degridding, when used successively. We analyze the impact of interpolation step size regarding the computation cost and the reconstruction error. We also illustrate this optimization on a full reconstruction with gradient descent and CLEAN algorithm. Finally, we obtain acceleration factors between 1.2 and 16.4 without additional approximation.
Fichier principal
Vignette du fichier
ICIP_monnier_final.pdf (721.63 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03725824 , version 1 (18-07-2022)
hal-03725824 , version 2 (13-09-2022)

Identifiants

Citer

Nicolas Monnier, François Orieux, Nicolas Gac, Cyril Tasse, Erwan Raffin, et al.. Fast Sky to Sky Interpolation for Radio Interferometric Imaging. 29th IEEE International Conference on Image Processing, ICIP 2022, Oct 2022, Bordeaux, France. ⟨10.1109/ICIP46576.2022.9897317⟩. ⟨hal-03725824v2⟩
95 Consultations
95 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More