A highly efficient lucky imaging algorithm: Image synthesis based on fourier amplitude selection

Vincent Garrel, Olivier Guyon, Pierre Baudoz

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We propose a new algorithm dramatically enhancing the efficiency of the lucky imaging technique for AO-corrected images in the visible range. It is achieved by a selection based on the relative strength of signal for each spatial frequency in the Fourier domain, making a more efficient use of information contained in each frame. Realistic simulations show that our algorithm allows us to reach the diffraction limit in the visible range on an AO-equipped 8 m telescope and enhances the Strehl ratio of an AO long exposure by a factor of up to 4. It outperforms the lucky imaging technique at an equivalent selection ratio. The fraction of selected data in simulation is also boosted from two to eight times for a given Strehl-ratio performance.

Original languageEnglish (US)
Pages (from-to)861-867
Number of pages7
JournalPublications of the Astronomical Society of the Pacific
Volume124
Issue number918
DOIs
StatePublished - Sep 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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