Abstract
We present an automated approach to active region extraction from full-disc MDI longitudinal magnetograms. This uses a region-growing technique in conjunction with boundary-extraction to define a number of enclosed contours as belonging to separate regions of magnetic significance on the solar disc. This provides an objective definition of active regions and areas of plage on the Sun. A number of parameters relating to the flare potential of each region are discussed.
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Abramenko, V. I., Yurchyshyn, V. B., Wang, H., Spirock, T. J., and Goode, P. R.: 2003, Astrophys. J. 597, 1135.
Berger, T. and Lites, B. W.: 2003, Solar Phys. 213, 213.
Bratsolis, E. and Sigelle, M.: 1998, Astron. Astrophys. Suppl. Ser. 131, 371.
Bugayevskiy, L. M. and Snyder, J. P.: 1995, Map Projections A Reference Manual, Taylor & Francis, Inc., Philadelphia.
DeForest, C. E.: 2004, Solar Phys. 219, 3.
Domingo, V., Fleck, B., and Poland, A. I.: 1995, Solar Phys. 162, 1.
Gallagher, P. T., Moon, Y.-J., and Wang, H.: 2002, Solar Phys. 209, 171.
Gonzales, R. C. and Woods, R. E.: 2002, Digital Image Processing, 2nd ed. Prentice-Hall Inc., New Jersey.
Green, L. M., Demoulin, P., Mandrini, C. H., and van Driel-Gesztelyi, L.: 2003, Solar Phys. 215, 307.
Lawrence, J. K., Ruzmaikin, A. A., and Cadavid, A. C.: 1996, Astrophys. J. 465, 425.
Lu, E. T.: 1995, Astrophys. J. 446, L109.
McAteer, R. T. J., Gallagher, P. T., and Ireland, J.: 2005, Astrophys. J. (in press).
Muenier, N.: 1999, Astrophys. J. 515, 801.
Nguyen, T. T., Willis, C. P., Paddon, D. P., and Nguyen, H. S.: 2004, In Intelligent Information Systems 59 (in press).
Pap, J. M., Turmon, M., Mukhtar, S., Bogart, R., Ulrich, R., Fröhlich, C., and Wehrli, Ch.: 1997, In Correlated Phenomena at the Sun, in the Heliosphere and in Geospace, Proceedings of 31st ESLAB Symposium, ESA-SP 415, 477.
Qu, M., Shih, F., Jing, J., and Wang, H.: 2004, Solar Phys. 222, 137.
Scherrer, P. H., et al.: 1995, Solar Phys. 162, 129.
Snyder, J. P.: 1993, Flattening the Earth: Two Thousand Years of Map Projections, The University of Chicago Press, Ltd., London.
Verwichte, E.: 2003, in A. Wilson (ed.), Solar Variability as an Input to the Earth's Environment, International Solar Cycle Studies Symposium, ESA-SP 535, 169.
Vlahos, L. and Georgoulis, M. K.: 2004, Astrophys. J. 603, L61.
Worden, J. R., White, O. R., and Woods, T. N.: 1998, Astrophys. J. 496, 998.
Zharkova, V., Ipson, S., Benkhalil A., and Zharkov, S.: 2005, Artif. Intell. J. (in press).
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McAteer, R.T.J., Gallagher, P.T., Ireland, J. et al. Automated Boundary-extraction And Region-growing Techniques Applied To Solar Magnetograms. Sol Phys 228, 55–66 (2005). https://doi.org/10.1007/s11207-005-4075-x
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DOI: https://doi.org/10.1007/s11207-005-4075-x