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基于辐射传输模型的水质固有光学参数的正则化反演

REGULARIZATION MODIFICATION INVERSION OF RADIATIVE TRANSFER EQUATIONS FOR RETRIEVE IOP OF WATER

中文摘要英文摘要

辐射传输方程作为一种物理模型,是对水体光场分布进行预测的良好工具。而求逆技术的发展,则为从辐射传输方程中提取水体信息提供了可能。然而,由于逆问题本身具有病态性,当前的求取水体固有光学参数的方法,多数都缺乏稳定性。本文提出了一种改进的正则化算法求解辐射传输方程。该算法通过向传统的高斯-牛顿迭代法中添加一个正则项,降低算法对噪声的敏感度,从而提高其稳定性。实验结果表明,在输入光谱含有一定噪声的情况下,算法仍然能够得到与非噪声输入条件下,近似的结果。

s a physical-based model, Radiative Transfer Equations (RTE) has proved to be an outstanding tool to predict light fields distribution in certain water body. Moreover, the inversion technique provide us a possibility to retrieve water properties from their spectrum based on RTE. However, existing inverse algorithms to calculate IOPs based on RTE are lack of stability due to the ill-posed nature of inverse problem. In this paper, we propose a modification inverse method to solve RTE. A regularization term is forced to Gauss-Newton iterations; therefore, the sensitivity to model noise is reduced, name-ly stability is improved. The experiment results show that our algorithm can acquire comparable retrieve outputs when noise is added to input spectrum.

张晔、谷延锋、魏然

物理学海洋学环境科学理论

信号处理正则化辐射传输方程反演稳定性

Signal ProcssingRegularizationRTERetrieveStability

张晔,谷延锋,魏然.基于辐射传输模型的水质固有光学参数的正则化反演[EB/OL].(2013-02-25)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201302-391.点此复制

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