ASCL.net

Astrophysics Source Code Library

Making codes discoverable since 1999

Astroalign

Discussion topics for individual codes
Ada Coda
ASCL Robot
Posts: 1302
Joined: Thu May 08, 2014 5:37 am

Astroalign

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

Astroalign

Abstract: Astroalign is a python module that will try 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 and so, 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 not work, or work with special care, 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

Return to “Astrophysics Source Code Library”

Who is online

Users browsing this forum: No registered users and 6 guests

cron