Sunspots Extraction in PMO Sunspot Drawings Based on Deep Learning

• Published in: Publications of the Astronomical Society of the Pacific Vol. 133; no. 1024; pp. 1 - 12
• Main Authors: Xu, Xiao, Yang, Yunfei, Zhou, Tuanhui, Feng, Song, Liang, Bo, Dai, Wei, Bai, Xianyong
• Format: Journal Article
• Language: English
• Published: IOP Publishing Limited 01.06.2021
• Subjects: Astronomical Software, Data Analysis, and Techniques

Sunspot numbers and sunspot areas are the most fundamental indices of long-term solar activity levels and the solar magnetic dynamo. This paper presents a deep-learning method for segmenting the components of sunspots in the Purple Mountain Astronomical Observatory (PMO) historical hand drawings spa...