Other
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sao..reptr....n&link_type=abstract
Final Report, 1 Jun. 1990 - 30 Nov. 1991 Smithsonian Astrophysical Observatory, Cambridge, MA.
Other
Image Enhancement, Image Processing, Imaging Techniques, Iterative Solution, Signal To Noise Ratios, Wiener Filtering, X Ray Imagery, Rosat Mission, Telescopes
Scientific paper
Blind Iterative Deconvolution (BID) is a technique which was originally developed to correct the degrading effects of atmospheric turbulence on astronomical images from single short exposure, high signal-to-noise-ratio frames. At the Center for Astro physics, we have implemented a version of BID following the general approach of Ayers and Dainty (1988), but extending the technique to use Wiener filtering, and developed it for application to high energy images from Einstein and ROSAT. In the optical, the point spread function (PSF) that degrades the images is due to a combination of telescope and atmospheric aberrations. At high energies, the degrading function is the instrument response function, which is known to be time and energy level unstable. In both cases, the PSF is poorly known, so BID can be used to extract the PSF from the image and then deconvolve the blurred image to produce a sharpened image. Other aspects of this technique are discussed.
Hughes John
Nisenson Peter
Standley Clive
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