CLEAN and WIPE

• Published in: Astronomy & astrophysics. Supplement series Vol. 123; no. 1; pp. 183 - 198
• Main Authors: Lannes, A., Anterrieu, E., Maréchal, P.
• Format: Journal Article
• Language: English
• Published: EDP Sciences 01.05.1997
• Subjects: Astrophysics; interferometric; methods: data analysis; numerical; Sciences of the Universe; techniques: image processing
• ISSN: 0365-0138; 1286-4846
• DOI: 10.1051/aas:1997312

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.