Automated Boundary-extraction And Region-growing Techniques Applied To Solar Magnetograms
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.
Unable to display preview. Download preview PDF.
- Bugayevskiy, L. M. and Snyder, J. P.: 1995, Map Projections A Reference Manual, Taylor & Francis, Inc., Philadelphia.Google Scholar
- Gonzales, R. C. and Woods, R. E.: 2002, Digital Image Processing, 2nd ed. Prentice-Hall Inc., New Jersey.Google Scholar
- McAteer, R. T. J., Gallagher, P. T., and Ireland, J.: 2005, Astrophys. J. (in press).Google Scholar
- Nguyen, T. T., Willis, C. P., Paddon, D. P., and Nguyen, H. S.: 2004, In Intelligent Information Systems 59 (in press).Google Scholar
- 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.Google Scholar
- Snyder, J. P.: 1993, Flattening the Earth: Two Thousand Years of Map Projections, The University of Chicago Press, Ltd., London.Google Scholar
- 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.Google Scholar
- Zharkova, V., Ipson, S., Benkhalil A., and Zharkov, S.: 2005, Artif. Intell. J. (in press).Google Scholar