Solar Physics

, Volume 228, Issue 1, pp 191-215

First online:

Solar Image Restoration By Use Of Multi-frame Blind De-convolution With Multiple Objects And Phase Diversity

  • Michiel Van NoortAffiliated withInstitute of Theoretical Astrophysics, University of Oslo Email author 
  • , Luc Rouppe Van Der VoortAffiliated withCenter of Mathematics for Applications, University of Oslo
  • , Mats G. LöfdahlAffiliated withInstitute for Solar Physics of the Royal Swedish Academy of Sciences, AlbaNova University Center

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An extension of Joint Phase Diverse Speckle image restoration is presented. Multiple realizations of multiple objects having known wavefront relations with each other can now be restored jointly. As the alignment of the imaging setup does not change, near-perfect alignment can be achieved between different objects, thus greatly reducing false signals in the determination of derived quantities, such as magnetograms, Dopplergrams, etc. The method was implemented in C++ as an image restoration server, to which worker clients can connect and disconnect randomly, so that a large number of CPUs can be used to speed up the restorations. We present a number of examples of applications of the restoration method to observations obtained with the Swedish 1-m Solar Telescope on La Palma.