基于复球面映射的大气偏振模式表征与分析.pdfVIP

学兔兔 第32卷 第4期 仪 器 仪 表 学 报 V01．32 No．4 2011年4月 Chinese Journal of Scientific Instrument Apr．2011 基于复球面映射的大气偏振模式表征与分析术 吴良海，高 隽，范之国，张 骏 (合肥工业大学计算机与信息学院 合肥 230009) 摘 要：为了解决理论大气偏振模式二维表征中存在的畸变问题，使理论模型与实测结果之间的对比准确可靠，提出一种基于 复球面映射的表征方法。首先根据复球面映射，建立球面与平面之间的投影关系；在此基础上，实现三维理论模型的无畸变二 维表征；最后，利用偏振成像系统检测结果与复球面映射理论模型在映射关系上的一致性，对比分析大气偏振模式变化规律。 实验结果表明，复球面映射能够实现理论大气偏振模式的无畸变表征，提高理论模型研究分析的准确度。 关键词：大气偏振模式；复球面；二维表征；偏振成像 中图分类号：TP391．9 P427．1 文献标识码：A 国家标准学科分类代码：110．2725 170．1510 Representati0n and analysis of skylight polarization pattern based on complex sphere mapping on 2D plane Wu Lianghai，Gao Jun，Fan Zhiguo，Zhang Jun (School of Computer and Information，Hefei University of Technology，Hefei 230009，China) Abstract：In this paper，an algorithm is proposed for representing the theoretical skylight polarization pattern without distortion on 2D plane and making comparison between theoretical models and measured results correctly and relia- bly．Firstly，the mapping between points on hemisphere and points on 2D plane is built based on complex sphere mapping．Then，the non·distortion 2D representation of the theoretical skylight polarization pattern is implemented． Finally，from the mapping coherence between the detection result of the polarimeter and complex sphere mapping theoretical model，the basic variation trend of skylight polarization pattern is analyzed and summarized．Experimental results show that the proposed algorithm can represent skylight polarization pa