Two Digital Filtering Methods and the Spiral Structure of the M 31 Galaxy

  • T. B. Georgiev
Conference paper


Image enhancement techniques are capable of greatly improving the image quality. Many methods have been envolved to diminish the noise by smoothing or some kind of low-frequency filtering, and there are a number of restoration methods by high-frequency filtering (Bijaoui, 1979). In this paper we shall examine two both simple and useful methods and some of their applications. For our purposes we used a Joyce Loebl microaensitometer and a PDP 11–34 computer of the Rozhen National Astronomical Observatory (Kovachev et al., 1984). The methods described are included in our image processing software (Georgiev, 1986).


Spiral Structure Residual Image Image Enhancement Technique Small Inclination Angle Foreground Star 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • T. B. Georgiev
    • 1
  1. 1.Department of Astronomy and National AstronomicalObservatory of the Bulgarian Academy of SciencesSofiaBulgaria

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