Research Article
Deep Learning for Automatic Recognition of Magnetic Type in Sunspot Groups
Figure 1
Magnetogram of NOAA 11158 AR (SDO/HMI, February 14, 2011, 22:24 UT). In gray images, white (positive polarity) and black (negative polarity) areas indicate strong magnetic fields, while gray areas show regions of weak magnetic fields. (a) and (b) are unprocessed and processed pictures, respectively.