Astron. Astrophys. Suppl. Ser.
Volume 123, Number 1, May II 1997
|Page(s)||183 - 198|
|Published online||15 May 1997|
CLEAN and WIPE
Laboratoire d'Astrophysique (and CERFACS),Observatoire Midi-Pyrénées, 14, Avenue Edouard Belin, F-31400 Toulouse, France
Send offprint request to: A. Lannes
Accepted: 22 July 1996
Clean is a matching pursuit process which has two weak points: in situations of astrophysical interest, the "clean map" is not stable in the corresponding object representation space, and the "atoms" of this representation (translated versions of the "clean beam") are not well suited for reconstructing the boundaries of the structuring entities of the object at the related resolution level. As a result, Clean must be interrupted before the best possible fit is reached. How does Wipe wipe Clean clean? First, by introducing a global regularization principle based on the concept of resolution; and second, by conducting the matching pursuit process at the level of the basis functions of the object space.
Key words: methods: data analysis; numerical / techniques: image processing; interferometric
© European Southern Observatory (ESO), 1997