High quality astronomical image compression

J. L. Starck, F. Murtagh, M. Louys

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present a new image compression method, for very high quality lossy compression. This method caters for image data in regimes of (i) detector imperfections, which motivates a robust approach based on the median transform, and (ii) noise, which is explicitly sought and separated out, since noise is inherently non-compressible. An in-depth assessment is carried out on real data, relative to the standard JPEG compression method. Comparable visual quality is based on 260:1 compression with the new method, and 40:1 compression with JPEG. The assessment procedure, based on the astronomical images used, is an objective approach for determining very high quality visual reconstructions.

Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalVistas in Astronomy
Volume41
Issue number3
DOIs
Publication statusPublished - 1997
Externally publishedYes

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