CLEAN (algorithm)

The CLEAN algorithm is a computational algorithm to perform a deconvolution on images created in radio astronomy. It was published by Jan Högbom in 1974[1] and several variations have been proposed since then.[2]

The algorithm assumes that the image consists of a number of point sources. It will iteratively find the highest value in the image and subtract a small gain of this point source convolved with the point spread function ("dirty beam") of the observation, until the highest value is smaller than some threshold.

References

  1. ↑ Aperture Synthesis with a Non-Regular Distribution of Interferometer Baselines, original publication by Jan Högbom about CLEAN, in the Astronomy and Astrophysics Supplement, Vol. 15, p.417
  2. ↑ The family of CLEAN algorithms, a chapter from the MAPPING software manual


This article is issued from Wikipedia - version of the 9/24/2012. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.