TY - JOUR
T1 - High quality astronomical image compression
AU - Starck, J. L.
AU - Murtagh, F.
AU - Louys, M.
PY - 1997
Y1 - 1997
N2 - 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.
AB - 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.
KW - Image compression
KW - Observatories
KW - Telescopes
UR - http://www.scopus.com/inward/record.url?scp=33750397094&partnerID=8YFLogxK
U2 - 10.1016/S0083-6656(97)00049-4
DO - 10.1016/S0083-6656(97)00049-4
M3 - Article
AN - SCOPUS:33750397094
VL - 41
SP - 439
EP - 445
JO - New Astronomy Reviews
JF - New Astronomy Reviews
SN - 1387-6473
IS - 3
ER -