基于局部运动向量时空统计的极光事件检测  

AURORAL EVENT DETECTION USING SPATIOTEMPORAL STATISTICS OF LOCAL MOTION VECTOR

作　　者：王倩[1,3] 梁继民[1] 胡泽骏[2] 

机构地区：[1]西安电子科技大学生命科学技术学院,陕西西安710071 [2]国家海洋局极地科学重点实验室,中国极地研究中心,上海200136 [3]西安邮电学院通信与信息工程学院,陕西西安710121

出　　处：《极地研究》2012年第1期60-69,共10页Chinese Journal of Polar Research

基　　金：国家自然科学基金(60872154,41031064,40904041,40974103);国家重点基础研究发展计划(973计划)(2010CB950503-06);海洋公益性行业科研专项(201005017);国家海洋局青年基金重点项目(2010613)资助

摘　　要：极光动态过程的分析与理解对极光发生机制研究具有重要意义。本文提出了一种基于动态过程的极光事件检测方法。首先利用多尺度流体光流的方法提取出极光的局部运动场信息,然后基于局部运动场时空统计特性表征极光视频序列,最后实现对特殊极光事件的检测。实验结果表明,本文方法能够高效、准确地检索到特殊极光事件,并且检测结果不依赖于目标事件的选择。这一成果为开展基于大量连续观测的极光视频对极光动态过程进行统计分析的研究奠定了基础。The analysis and exploration of auroral dynamics are very significant for studying the auroral mechanism.In this paper,a method based on an auroral dynamic process for automatically detecting an auroral event is proposed.We first obtained the local motion information using a multi-scale fluid flow estimator.Then the auroral sequence was represented by the spatiotemporal statistics of local motion vectors.Finally,auroral event-based detection was automatically achieved.The experimental results showed our methods could effectively and accurately detect the required auroral events,and were not dependent on any specified auroral event.The proposed method makes it feasible to statistically analyze a large number of continuous observations based on the auroral dynamic process.

关 键 词：极光事件 流体 极向运动 自动检测 

分 类 号：P353.6[天文地球—空间物理学]