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Proceedings Paper

Image restoration with spatially variable PSF
Author(s): Paolo Ciliegi; Andrea La Camera; Laura Schreiber; Michele Bellazzini; Mario Bertero; Patrizia Boccacci; Emiliano Diolaiti; Italo Foppiani; Matteo Lombini; Davide Massari; Paolo Montegriffo; Margherita Talia
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Paper Abstract

We present a method for the restoration of astronomical images obtained with Adaptive Optics (AO) systems. In order to maximize the scientific return from AO data and, in general, from the data of the next generation telescopes, we developed a restoration method based on deconvolution for the de-blurring of images degraded by a spatially variable PSF. The deconvolution method is based on a partition of the image domain in partially overlapping sub-domains where the PSF can be assumed to be space invariant. The software, called Patch, is written in IDL language and is freely distributed to the community. Here we report a general description of the method and of its graphical interface. The potentiality of the Software Patch have been tested on two completely different astrophysical scenarios: a crowded stellar field and an extended galaxy. Despite the very conservative assumptions made on the Point Spread Function (assumed to be strongly variable across the field of view), we obtained good results in terms of image reconstruction both for the stellar (point-like) case and for the extended galaxy.

Paper Details

Date Published: 7 August 2014
PDF: 14 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91482O (7 August 2014); doi: 10.1117/12.2055914
Show Author Affiliations
Paolo Ciliegi, INAF - Osservatorio Astronomico di Bologna (Italy)
Andrea La Camera, Univ. degli Studi di Genova (Italy)
Laura Schreiber, INAF - Osservatorio Astronomico di Bologna (Italy)
Michele Bellazzini, INAF - Osservatorio Astronomico di Bologna (Italy)
Mario Bertero, Univ. degli Studi di Genova (Italy)
Patrizia Boccacci, Univ. degli Studi di Genova (Italy)
Emiliano Diolaiti, INAF - Osservatorio Astronomico di Bologna (Italy)
Italo Foppiani, INAF - Osservatorio Astronomico di Bologna (Italy)
Matteo Lombini, INAF - Osservatorio Astronomico di Bologna (Italy)
Davide Massari, Univ. degli Studi di Bologna (Italy)
Paolo Montegriffo, INAF - Osservatorio Astronomico di Bologna (Italy)
Margherita Talia, Univ. degli Studi di Bologna (Italy)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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