FDTD polarimetric scattering analysis for detection of stricken man-made object
FDTD polarimetric scattering analysis for detection of stricken man-made object
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发表时间：
2011-11
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通讯作者：
R. Sato;Y. Yamaguchi;Hiroyoshi Yamada
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作者：
R. Sato;Y. Yamaguchi;Hiroyoshi Yamada
本文研究了人造物体产生的极化散射特征，以实现对受损人造建筑物的准确检测。为了验证目标极化散射分量的产生机理，对简化的人造目标模型进行了FDTD极化散射分析。详细研究了偏振散射特性与斜视角度变化的关系。基于相干矩阵旋转的散射功率分解的估计证实，即使目标物体倾斜对准照明方向，并且它们位于粗糙表面上，双反弹散射贡献也趋于增强，体积散射变小。对于变形的人造物体模型，可以观察到这种趋势。此外，还发现修正的LR圆极化基相关系数对于检测粗糙表面上的人造目标是有用的。
This paper investigates polarimetric scattering feature generated from man-made objects for accurately detecting stricken man-made buildings. To verify the generating mechanism of the polarimetric scattering components from the objects, we carry out the Finite-Difference Time-Domain (FDTD) polarimetric scattering analysis for simplified man-made target model. The dependency of the polarimetric scattering feature on the variation of squint angle is in detail investigated. It is confirmed from the estimation based on the scattering power decomposition with rotation of the coherency matrix that the double-bounce scattering contribution tends to be enhanced, and the volume scattering becomes small, even when the target objects are obliquely aligned to the illumination direction, and they set on rough surface. This tendency can be observed for the deformed man-made object model. Also, it is found that the modified correlation coefficient in LR circular polarization basis is useful for detecting the man-made objects on rough surface.