Astronomical Coma Image Restoration Through the Use of Localized Deconvolution

Details Astronomical Coma Image Restoration Through the Use of Localized Deconvolution Astronomical Coma Image Restoration Through the Use of Localized Deconvolution

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sass...27..141g&link_type=abstract

The Society for Astronomical Sciences 27th Annual Symposium on Telescope Science. Held May 20-22, 2008 at Big Bear Lake, CA. Pub

Astronomy and Astrophysics

Astronomy

Scientific paper

This paper discusses an image restoration technique to effectively post-process astronomical images to remove coma artifacts. Coma is a common problem for imprecise optical systems that manifest its self as distortions that worsen near the edge of the image. Conventional full-image deconvolution techniques will not remove this artifact because the coma exhibits a positionally variant distortion of the image, i.e., the optical point spread function (PSF) varies as a function of position at the focal plane. Coma repair is accomplished by partitioning the image into small blocks, estimating the PSF of the block, applying the Richardson-Lucy deconvolution algorithm to each block and then reassembly of the blocks into the final image.

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