Astronomical Image Compression Based on Noise Suppression

Details Astronomical Image Compression Based on Noise Suppression Astronomical Image Compression Based on Noise Suppression

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasp..108..446s&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.108, p.446

Astronomy and Astrophysics

Astronomy

17

Scientific paper

We review methods which are widely used for compression of astronomical images. These include multiresolution approaches. We use such an approach, a pyramidal median transform, which is followed by noise suppression at each resolution scale. To preserve photometric and astrometric fidelity to the input image, a multiresolution astronomical object support is used. We discuss the common astronomical noise models (additive Poisson, Gaussian, and poisson plus Gaussian). A range of examples on digitized plate, and on CCD, image data is used to show the effectiveness of this approach. (SECTION: Computing and Data Analysis)

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