Valentina V. Zharkova Stanley S. Ipson Sergei I. Zharkov Ilias Maglogiannis Intensity and Region-Based Feature Recognition in Solar Images. 59-149 2007 Artificial Intelligence in Recognition and Classification of Astrophysical and Medical Images http://dx.doi.org/10.1007/978-3-540-47518-7_3 series/sci/2007-46 db/series/sci/sci46.html#ZharkovaIZM07