HST image processing: how does it work and what are the problems?

Details HST image processing: how does it work and what are the problems? HST image processing: how does it work and what are the problems?

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1567..308w&link_type=abstract

Proc. SPIE Vol. 1567, p. 308-316, Applications of Digital Image Processing XIV, Andrew G. Tescher; Ed.

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The spherical aberration of the primary mirror of the Hubble Space Telescope has seriously reduced the sensitivity and degraded the resolution of images and spectra from the instruments onboard the satellite. In this paper, we describe the nature of the aberration problem and the resulting point-spread functions for both the imaging and spectrographic detectors. A number of image restoration algorithms have been evaluated for use on HST data, including both linear and non-linear techniques, and sample results are shown for a modified Richardson- Lucy method. The best prospects for obtaining improvements in the restored images are likely to derive from developing techniques for adaptive regularization.

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