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Proceedings Paper

Restoration of images for the Hubble Space Telescope
Author(s): Robert James Hanisch; Richard L. White
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Paper Abstract

The Hubble Space Telescope image quality is degraded significantly as a result of the spherical aberration in the primary mirror. Although the forthcoming HST servicing mission will deploy corrective optics systems and a second-generation camera with built-in correctors, the current and archival images for the past three years require the use of restoration techniques in order to achieve the full scientific potential of the HST mission. In addition, we expect that the restoration techniques now being developed will continue to be utilized on post- servicing mission imagery in order to remove the remaining diffraction features and optimize dynamic range. A variety of well-known image restoration techniques, such as Wiener filters, Richardson-Lucy, Jansson-van Cittert, CLEAN, and maximum entropy, have been applied to HST imaging with reasonable success. However, all techniques have been hampered by incomplete knowledge of the point spread function and the space variance of the PSF in the Wide Field/Planetary Camera, HST's most frequently used imager. The best restoration results to date have been obtained by utilizing observed PSFs (an optimal exposure which minimizes noise and image defects) on small enough subsets of the total field of view so that the PSF variation can be ignored.

Paper Details

Date Published: 9 November 1993
PDF: 8 pages
Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); doi: 10.1117/12.161998
Show Author Affiliations
Robert James Hanisch, Space Telescope Science Institute (United States)
Richard L. White, Space Telescope Science Institute (United States)

Published in SPIE Proceedings Vol. 2029:
Digital Image Recovery and Synthesis II
Paul S. Idell, Editor(s)

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