2003/05/31 by R. Vio, Roberto Vio, P. Andreani +3
Mathematics · Physics and Astronomy · #Adaptive optics and wavefront sensing #Artificial intelligence #Computer science #Computer vision #Context (archaeology) #Cosmic microwave background #Curvature #Detection theory #Detector #Filter (signal processing) #Galaxies: Formation, Evolution, Phenomena #Geography #Geometry #Image (mathematics) #Matched filter #Mathematics #Optics #Physics #Point (geometry) #Point source #Radio Astronomy Observations and Technology #SIGNAL (programming language) #Scale (ratio) #Thresholding #Wavelet #astro-ph
paper · pdf · doi:10.1051/0004-6361:20031632
published as Astron.Astrophys. 414 (2004) 17-21 · Replacement after submission to A&A and referee's comments. Astronomy and Astrophysics, in press, JNL/2003/4737
arxiv created 2003/10/22 · openalex publication_date 2004/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we comment on the results concerning the performances of matched filters, scale adaptive filters and Mexican hat wavelet that recently appeared in literature in the context of point source detection in Cosmic Microwave Background maps. In particular, we show that, contrary to what has been claimed, the use of the matched filters still appear to be the most reliable and efficient method to disantangle point sources from the backgrounds, even when using detection criterion that, differently from the classic thresholding rule, takes into account not only the height of the peaks in the signal corresponding to the candidate sources but also their curvature.