Automated detection and tracking of solar magnetic bright points

Automated detection and tracking of solar magnetic bright points
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太阳磁亮点的自动检测和跟踪

DOI:
10.1111/j.1365-2966.2009.15083.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
Crockett P
Crockett P
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Crockett P

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网际网络中的磁亮点(Mbps)是太阳光球层中最小的物体之一,在周围环境下显得明亮。提出了一种可用于空域和时间域的MBPS自动检测的算法。该算法的工作原理是通过强度阈值映射车道。指南针搜索,结合对检测到的物体的强度梯度的研究,允许从颗粒内的明亮像素中分离出Mbps。实现对象增长是为了解决在映射车道时可能已移除的任何像素。通过定位可能因光照水平和观看质量变化而遗漏的长寿命物体,可以稳定图像。利用瑞典太阳望远镜采集的数据对该算法进行了测试,结果表明,在75×75弧秒的视场内,≈可以探测到90%的Mbps。
Magnetic bright points (MBPs) in the internetwork are among the smallest objects in the solar photosphere and appear bright against the ambient environment. An algorithm is presented that can be used for the automated detection of the MBPs in the spatial and temporal domains. The algorithm works by mapping the lanes through intensity thresholding. A compass search, combined with a study of the intensity gradient across the detected objects, allows the disentanglement of MBPs from bright pixels within the granules. Object growing is implemented to account for any pixels that might have been removed when mapping the lanes. The images are stabilized by locating long-lived objects that may have been missed due to variable light levels and seeing quality. Tests of the algorithm, employing data taken with the Swedish Solar Telescope, reveal that ≈90 per cent of MBPs within a 75 × 75 arcsec2field of view are detected.
DOI: 10.1007/bfb0022424
发表时间: 1984-08
期刊: Solar Physics
影响因子: 2.8
作者:
R. Muller;T. Roudier
通讯作者: R. Muller;T. Roudier
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DOI: 10.1086/177291
发表时间: 1996
期刊: The Astrophysical Journal
影响因子: --
作者:
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DOI: --
发表时间: 1973
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