Astroalign: A Python module for astronomical image registration

We present an algorithm implemented in the Astroalign Python module for image registration in astronomy. Our module does not rely on WCS information and instead matches three-point asterisms (triangles) on the images to find the most accurate linear transformation between them. It is especially usef...

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Bibliographic Details
Published in:Astronomy and computing Vol. 32; p. 100384
Main Authors: Beroiz, M., Cabral, J.B., Sanchez, B.
Format: Journal Article
Language:English
Published: Elsevier B.V 01.07.2020
Subjects:
Astronomy
Image registration
Python package
Image registration
Python package
Astronomy
ISSN:2213-1337, 2213-1345
Online Access:Get full text
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Description
Summary:We present an algorithm implemented in the Astroalign Python module for image registration in astronomy. Our module does not rely on WCS information and instead matches three-point asterisms (triangles) on the images to find the most accurate linear transformation between them. It is especially useful in the context of aligning images prior to stacking or performing difference image analysis. Astroalign can match images of different point-spread functions, seeing, and atmospheric conditions.
ISSN:2213-1337
2213-1345
DOI:10.1016/j.ascom.2020.100384