Astronomy and Astrophysics – Astronomy
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasp..115..628d&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 115, Issue 807, pp. 628-634.
Astronomy and Astrophysics
Astronomy
4
Methods: Numerical, Techniques: Image Processing, Techniques: Photometric
Scientific paper
A fast flat-fielding algorithm is presented that uses two orthogonal constant-speed scans of an image across a detector to compute a flat field. Each scan image calibrates the cross-scan direction of the other. Results from the ISOON solar telescope are presented. For a camera with 2048×2048 pixels, the computation requires 30 s of processing time and yields a result that is comparable to a Kuhn-Lin flat field, which requires 1 hr of processing time on the same system. The total system photometric accuracy using the fast method is about 1%. The method has been tested for full-disk and high-resolution solar imaging.
Bianda Michele
Dalrymple Nathan E.
Wiborg Philip H.
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