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Ada Coda
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Astroalign: Asterism-matching alignment of astronomical images

Postby Ada Coda » Mon Jun 10, 2019 6:21 pm

Astroalign: Asterism-matching alignment of astronomical images

Abstract: Astroalign tries to register (align) two stellar astronomical images, especially when there is no WCS information available. It does so by finding similar 3-point asterisms (triangles) in both images and deducing the affine transformation between them. Generic registration routines try to match feature points, using corner detection routines to make the point correspondence. These generally fail for stellar astronomical images since stars have very little stable structure so are, in general, indistinguishable from each other. Asterism matching is more robust and closer to the human way of matching stellar images. Astroalign can match images of very different field of view, point-spread function, seeing and atmospheric conditions. It may require special care or may not work on images of extended objects with few point-like sources or in crowded fields.

Credit: Beroiz, Martin I

Site: https://github.com/toros-astro/astroalign
https://ui.adsabs.harvard.edu/abs/2019A%26C....2800284S

Bibcode: 2019ascl.soft06001B

ID: ascl:1906.001
Last edited by Ada Coda on Sun Jun 30, 2019 3:39 am, edited 1 time in total.
Reason: Updated code entry.

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