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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Model-Based Decomposition With Cross Scattering for Polarimetric SAR Urban Areas
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Model-Based Decomposition With Cross Scattering for Polarimetric SAR Urban Areas

机译:极化SAR城市地区基于模型的交叉散射分解

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摘要

Cross-polarized scattering (HV) is not only caused by vegetation but also by rotated dihedrals. In this letter, we use rotated dihedral corner reflectors to form a cross scattering matrix and propose an extended model-based decomposition method for polarimetric synthetic aperture radar (PolSAR) data over urban areas. Unlike other urban decomposition techniques which need to discriminate between urban and natural areas before decomposition, this proposed method is applied directly on the PolSAR image. The building orientation angle is considered in this scattering matrix, making it flexible and adaptive in the decomposition process. This enables the separation of the cross scattering of urban areas from the overall HV component. The cross and helix scattering components are also compared in this study. RADARSAT-2 quad-pol C band and AIRSAR L band data are used to validate the performance of the proposed method. The cross scattering power of oriented buildings is generated, leading to a better decomposition result for urban areas with respect to other urban decomposition techniques.
机译:交叉极化散射(HV)不仅由植被引起,而且还由旋转的二面角引起。在这封信中,我们使用旋转的二面角反射器形成交叉散射矩阵,并针对城市地区的极化合成孔径雷达(PolSAR)数据提出了一种基于模型的扩展分解方法。与其他需要在分解之前区分城市和自然区域的城市分解技术不同,此提议的方法直接应用于PolSAR图像。在此散射矩阵中考虑了建筑物的定向角,使其在分解过程中具有灵活性和适应性。这样可以将城市地区的交叉散射与整个HV分量分开。在这项研究中还比较了交叉和螺旋散射分量。 RADARSAT-2四极点C波段和AIRSAR L波段数据用于验证所提出方法的性能。产生定向建筑物的交叉散射能力,从而导致相对于其他城市分解技术,城市地区具有更好的分解结果。

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