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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Critical Analysis of Model-Based Incoherent Polarimetric Decomposition Methods and Investigation of Deorientation Effect
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Critical Analysis of Model-Based Incoherent Polarimetric Decomposition Methods and Investigation of Deorientation Effect

机译：基于模型的非相干极化分解方法的临界分析和失取向效应的研究

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This paper critically analyzes several incoherent model-based decomposition methods for assessing the effect of deorientation in characterization of various land covers. It has been found that even after performing decomposition, ambiguity still occurs in scattering response from various land covers, such as urban and vegetation. Researchers introduced the concept of deorientation to remove this ambiguity. Therefore, in this paper, a critical analysis has been carried out using seven different three- and four-component decomposition methods with and without deorientation and two Eigen decomposition-based methods to investigate the scattering response on various land covers, such as urban, vegetation, bare soil, and water. The comprehensive evaluation of decomposition and deorientation effect has been performed by both visual and quantitative analyses. Two types of quantitative analysis have been performed; first, by observing percentage of scattering power and second, by analyzing the variation in the number of pixels in different land covers for each scattering contribution. The analysis shows that deorientation increases not only the power but also the number of pixels for surface and double bounce scattering. The number of pixels representing volume scattering remain almost the same for all the methods with or without deorientation, whereas volume scattering power reduces after deorientation. Eigen decomposition-based methods are observed to solve the problem of overestimation of volume scattering power.
机译：本文对基于非相干模型的几种分解方法进行了批判性分析，以评估脱取向对各种土地覆盖物表征的影响。已经发现，即使在进行分解之后，来自各种土地覆盖物，例如城市和植被的散射响应中仍然会出现模糊性。研究人员介绍了去取向的概念，以消除这种歧义。因此，在本文中，我们使用了七种不同的三方向分解和四方向分解方法（带有和不带有方向性）以及两种基于特征分解的方法进行了临界分析，以研究在各种土地覆盖物（例如城市，植被）上的散射响应，裸露的土壤和水。通过目测和定量分析对分解和失取向效果进行了综合评估。进行了两种类型的定量分析：首先，通过观察散射功率的百分比，其次，对于每种散射贡献，通过分析不同土地覆被中像素数量的变化。分析表明，失取向不仅增加了功率，而且还增加了表面和双反射散射的像素数量。对于所有方法，无论有无定向，表示体积散射的像素数都几乎保持不变，而在定向后，体积散射能力降低。观察到基于特征分解的方法可以解决高估体积散射功率的问题。

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