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A Decomposition Method of Fully Polarized SAR Target Based on Optimal Angle Processing

A technology of target decomposition and full polarization, which is applied in the field of full polarization SAR target decomposition, can solve the problems of overestimation of volume scattering components, insufficient information utilization, and many branches of processing flow conditions, and achieve the effect of full information utilization

Active Publication Date: 2022-02-01
WUHAN UNIV
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Problems solved by technology

[0006] Aiming at the problems of insufficient information utilization, overestimation of volume scattering components, and many branches of processing flow conditions when decomposing polarimetric SAR data in the prior art, the present invention proposes a fully polarimetric SAR target decomposition method for angle optimization processing

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  • A Decomposition Method of Fully Polarized SAR Target Based on Optimal Angle Processing
  • A Decomposition Method of Fully Polarized SAR Target Based on Optimal Angle Processing
  • A Decomposition Method of Fully Polarized SAR Target Based on Optimal Angle Processing

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Embodiment Construction

[0051] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0052] An angle optimized processing of an angle optimization process according to an embodiment of the present invention is incorporated in figure 1 As shown, including the following steps:

[0053] Step 1, read into polarized SAR data, to polarize the coherent matrix T 3 T ij ) 3×3 Take an example, T ij T 3 Each element of the matrix.

[0054] For details, if the original polarized SAR data is a scattering matrix S 2 , Polarization covariance matrix C 3 , Can be converted to T 3 After the matrix, the process is processed by the present embodiment.

[0055] Step 2, the data filtering, obtains the filtered polarization SAR data.

[0056] In order to eliminate the impact of the coherent spots on the polarized SAR image, the embodiment preferably uses a BoxCar filter having a filter window size of 3x3 to filter the original polarized SA...

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Abstract

The present invention provides a fully polarimetric SAR target decomposition method for angle optimization processing, read in polarimetric SAR data, filter and perform de-orientation Yamaguchi four-component decomposition, and obtain the initial surface scattering component, even-time scattering component, and volume scattering component , helical scattering component, even-order scattering parameter, surface scattering parameter, rotation angle and generalized volume scattering component, volume scattering component contributed by dihedral angle scattering; the T 3 The (θ) matrix is ​​decomposed into the weighted sum of surface scattering, even-order scattering, generalized volume scattering, extended volume scattering, helical scattering and decomposition residual matrix, calculates the initial reconstruction loss of the decomposition model, defines the corresponding optimization problem, and reconstructs the loss The information after the four-component decomposition and the loss of the original matrix information and the difference between the sum of the power of each component and the total power are reflected in the medium; the optimal parameters are obtained by using the gradient descent method, and the surface scattering power Ps, even-order scattering power Pd, and volume scattering power Pv are extracted. , the helical scattering power Pc, obtain the four-component decomposition result, and obtain the target characteristics of the SAR image.

Description

Technical field [0001] The present invention belongs to the Synthetic Aperture Radar, SAR image processing technology, and more is a further involve an angle optimization process of the generalized SAR target decomposition method. Background technique [0002] Polarized SAR By transmitting and receiving electromagnetic waves, it is possible to perform a daily observation all day, providing a wealth of scattering information for the interpretation of the object object. Through effective methods, the scattering mechanism can greatly improve the ability of the polar SAR image in the task of target detection, and art object classification, making polar SAR play a more important role in emergency rescue disaster relief, urban analysis planning. . [0003] Considering data transcutability, polarized SAR data can be expressed as rear scatter matrix S 2 , Polarization covariance matrix C 3 , Polarized coherent matrix T 3 The three have a unique correspondence, which can be transformed wi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G06K9/00
CPCG01S13/9021G01S13/90G06F2218/02
Inventor 徐新杨瑞桂容王磊卜方玲
Owner WUHAN UNIV