Have you tested STARA (the Sunspot Tracking And Recognition Algorithm) by F= raser Watson ?
Some web links provided below to make things clear
https://github.com/sunpy/sunkit-image/issues/37
STARA sunspot detection software
fraserwatson
=3D=3D=3D=3D
29. The STARA Sunspot Catalog
Contributed by Fraser Watson. Posted on October 2, 2014
Fraser Watson
National Solar Observatory, Tucson, AZ 85719, USA
http://hmi.stanford.edu/hminuggets/?p=3D981
Automated sunspot detection and the evolution of sunspot magnetic fields du= ring solar cycle 23
Watson, Fraser ; Fletcher, Lyndsay
https://ui.adsabs.harvard.edu/abs/2011IAUS..273...51W/abstract
Evolution of sunspot properties during solar cycle 23
Watson, F. T. ; Fletcher, L. search by orcid ; Marshall, S.
https://ui.adsabs.harvard.edu/abs/2011A%26A...533A..14W/abstract
A Multi-wavelength Analysis of Active Regions and Sunspots by Comparison of=
Automatic Detection Algorithms
Verbeeck, C. ; Higgins, P. A. ; Colak, T. ; Watson, F. T. ; Delouille, V. ;=
Mampaey, B. ; Qahwaji, R.
https://ui.adsabs.harvard.edu/abs/2013SoPh..283...67V/abstract
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29. The STARA Sunspot Catalog
Contributed by Fraser Watson. Posted on October 2, 2014
Fraser Watson
National Solar Observatory, Tucson, AZ 85719, USA
Sunspots
http://hmi.stanford.edu/hminuggets/?p=3D981
https://soho.nascom.nasa.gov/data/synoptic/sunspots_earth/sunspots_512_2022= 1008.jpg
https://soho.nascom.nasa.gov/data/synoptic/sunspots_earth/sunspots_512_2022= 1006.jpg
https://soho.nascom.nasa.gov/data/LATEST/current_eit_171.gif
https://www.researchgate.net/profile/Fraser-Watson
Automated sunspot detection and the evolution of sunspot magnetic fields du= ring solar cycle 23
Article
Full-text available
Sep 2010
Fraser Thomas Watson
Lyndsay Fletcher
The automated detection of solar features is a technique which is relativel=
y underused but if we are to keep up with the flow of data from spacecraft = such as the recently launched Solar Dynamics Observatory, then such techniq= ues will be very valuable to the solar community. Automated detection techn= iques allow us to examine a large set of data in a...
https://www.researchgate.net/publication/46588193_Automated_sunspot_detecti= on_and_the_evolution_of_sunspot_magnetic_fields_during_solar_cycle_23
[1009.5884] Automated sunspot detection and the evolution of ...
https://arxiv.org =E2=80=BA astro-ph
by F Watson =C2=B7 2010 =C2=B7 Cited by 14 =E2=80=94 This article details t=
he use of the Sunspot Tracking And Recognition Algorithm (STARA) to create =
a sunspot catalogue.
Glasgow Theses Service
http://theses.gla.ac.uk/
[email protected]
Watson, Fraser Thomas (2012) Investigating sunspot and photospheric
magnetic field properties using automated solar feature detection. PhD
thesis.
http://theses.gla.ac.uk/3429
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