Article

Solar Physics

, Volume 187, Issue 2, pp 347-356

First online:

Resolution Improvement of Solar Images

  • Noriaki MiuraAffiliated withDepartment of Computer Sciences, Kitami Institute of Technology
  • , Naoshi BabaAffiliated withDepartment of Applied Physics, Faculty of Engineering, Hokkaido University
  • , Takashi SakuraiAffiliated withNational Astronomical Observatory of Japan
  • , Kiyoshi IchimotoAffiliated withNational Astronomical Observatory of Japan
  • , Dirk SoltauAffiliated withKiepenheuer-Institut für Sonnenphysik
  • , Peter BrandtAffiliated withKiepenheuer-Institut für Sonnenphysik

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Abstract

A method for the improvement of resolution in an observed solar image is proposed. A blind deconvolution method is used for restoration of an atmospherically-degraded solar image, and a super-resolution method is applied to its restored image to improve the resolution. It is confirmed that a blind deconvolution process can restore fine structures that are blurred in an observed image, and that the super-resolution process can make a cutoff frequency in a blind-deconvolved image higher. A time series of super-resolved images of a sunspot observed with the 70-cm Vacuum Tower Telescope at Teide Observatory is presented.