Automatic noise estimation from the multiresolution support

Jean Luc Starck, Fionn Murtagh

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


We describe an automated approach for determining the noise associated with astronomical images. Detector noise is ever present and must be determined for high-quality image filtering or compression. We also show that the method can be used for very high quality cosmic-ray hit removal. Our method is based on a multiresolution transform of the image, the à trous wavelet transform. We present a range of examples and applications to illustrate the effectiveness of this approach.

Original languageEnglish
Pages (from-to)193-199
Number of pages7
JournalPublications of the Astronomical Society of the Pacific
Issue number744
Publication statusPublished - 1 Jan 1998
Externally publishedYes


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