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Polarized SAR image target decomposition method based on extended G4U

A target decomposition and image technology, applied in the field of polarimetric SAR image target decomposition based on the expansion of G4U, to achieve the effect of accurate recognition and understanding and substantial improvement

Active Publication Date: 2019-05-14
NAT SPACE SCI CENT CAS
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Problems solved by technology

Then the question is, for an unknown target, how to know whether it is suitable for G4U or dual G4U without decomposing it, so that the complementary effects of G4U and dual G4U can be maximized

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  • Polarized SAR image target decomposition method based on extended G4U
  • Polarized SAR image target decomposition method based on extended G4U
  • Polarized SAR image target decomposition method based on extended G4U

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Embodiment Construction

[0043] The present invention will be further described now in conjunction with accompanying drawing.

[0044] refer to figure 1 and figure 2 , the expansion G4U target decomposition method of a kind of polarimetric SAR image of the present invention, comprises the following steps:

[0045] Step 1), read in the coherence matrix [T] data of the polarization SAR image to be decomposed, and perform a deorientation operation to obtain [T′];

[0046] Step 2), based on the coherence matrix [T'] obtained in step 1), calculate the decomposition parameter C, and calculate the branch condition parameter BC based on C 1 and BC 2 ;

[0047] Step 3), based on the parameters C and BC obtained in step 2) 1 and BC 2 , determine the decomposition parameter V, and further calculate the decision parameter D based on V;

[0048] Step 4), based on the parameter D obtained in step 3), if D is positive, execute G4U to obtain the surface scattering power P S , Dihedral scattering power P D ,...

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Abstract

The invention discloses a polarized SAR image target decomposition method based on extended G4U. The method comprises the following steps: automatically selecting a decomposition method optimally matched with a target between G4U and dual G4U according to a judgment parameter related to the polarimetric SAR image target to be decomposed, so as to realize adaptive decomposition of an unknown targetin the polarimetric SAR image. According to the target decomposition method disclosed by the invention, the G4U and the dual G4U are effectively combined together through an adaptive selection strategy, so that the maximization of the complementary effect of the G4U and the dual G4U is realized, and the identification and understanding of a radar target are more accurate.

Description

technical field [0001] The invention relates to the field of polarimetric SAR image information processing, in particular to the field of polarimetric SAR target decomposition and model-based target decomposition, and in particular to a polarimetric SAR image target decomposition method based on extended G4U. Background technique [0002] Model-based polarization decomposition aims to expand the polarization coherence matrix [T] of an unknown target on several standard scattering models to realize its identification and classification. The classic four-component model decomposition methods such as Y4R and S4R can only realize the interpretation of the seven degrees of freedom of the coherence matrix [T], and there are still two degrees of freedom unused, corresponding to T 13 The real and imaginary parts of the components. To this end, Singh et al. (G. Singh, Y. Yamaguchi, and S.-E. Park, “General four-component scattering power decomposition with unitary transformation of ...

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Application Information

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IPC IPC(8): G06K9/00G06K9/62
Inventor 李东张云华
Owner NAT SPACE SCI CENT CAS
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