Enhancement of astronomical images using digital filtration methods

Details Enhancement of astronomical images using digital filtration methods Enhancement of astronomical images using digital filtration methods

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982azh....59..160k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 59, Jan.-Feb. 1982, p. 160-173.) Soviet Astronomy, vol. 26, Jan.-Feb. 1982, p. 97-104. Translat

Astronomy and Astrophysics

Astronomy

3

Astronomical Photography, Digital Filters, Image Enhancement, Image Reconstruction, Algorithms, Angular Resolution, Astronomical Maps, Radio Galaxies

Scientific paper

A technique for reconstructing astronomical images using digital filtration is presented. A quantitative description of the factors causing image distortion is presented, and an algorithm for image enhancement is developed. The frequency characteristics of the reconstructing filter are given for the distorting system and the signal-to-noise ratio. Consideration is given to two-dimensional Fourier transform of the large image matrices. The technique is examined for the M 87 radio galaxy and an improvement of 2-3 times in the angular resolution of the original photograph is demonstrated.

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