Astroalign: A Python module for astronomical image registration
Abstract
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.
- Publication:
-
Astronomy and Computing
- Pub Date:
- July 2020
- DOI:
- 10.1016/j.ascom.2020.100384
- arXiv:
- arXiv:1909.02946
- Bibcode:
- 2020A&C....3200384B
- Keywords:
-
- Astronomy;
- Image registration;
- Python package;
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Computer Science - Computer Vision and Pattern Recognition
- E-Print:
- 4 pages, 2 figures, Python package
