A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment
The model-based polarimetric decomposition is extensively studied due to its simplicity and clear physical interpretation of Polarimetric Synthetic Aperture Radar (PolSAR) data. Though there are many fine basic scattering models and well-designed decomposition methods, the overestimation of volume s...
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MDPI AG
2023-09-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/18/4512 |
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| author | Yancui Duan Sinong Quan Hui Fan Zhenhai Xu Shunping Xiao |
| author_facet | Yancui Duan Sinong Quan Hui Fan Zhenhai Xu Shunping Xiao |
| author_sort | Yancui Duan |
| collection | DOAJ |
| description | The model-based polarimetric decomposition is extensively studied due to its simplicity and clear physical interpretation of Polarimetric Synthetic Aperture Radar (PolSAR) data. Though there are many fine basic scattering models and well-designed decomposition methods, the overestimation of volume scattering (OVS) may still occur in highly oriented buildings, resulting in severe scattering mechanism ambiguity. It is well known that not only vegetation areas but also oriented buildings may cause intense cross-pol power. To improve the scattering mechanism ambiguity, an appropriate scattering model for oriented buildings and a feasible strategy to assign the cross-pol power between vegetation and oriented buildings are of equal importance. From this point of view, we propose a five-component decomposition method with a general rotated dihedral scattering model and an assignment strategy of cross-pol power. The general rotated dihedral scattering model is established to characterize the integral and internal cross-pol scattering from oriented buildings, while the assignment of cross-pol power between volume and rotated dihedral scattering is achieved by using an eigenvalue-based descriptor <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">D</mi><mrow><mi>OOB</mi></mrow></msub></mrow></semantics></math></inline-formula>. In addition, a simple branch condition with explicit physical meaning is proposed for model parameters inversion. Experiments on spaceborne Radarsat−2 C band and airborne UAVSAR L band PolSAR datasets demonstrate the effectiveness and advantages of the proposed method in the quantitative characterization of scattering mechanisms, especially for highly oriented buildings. |
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| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T22:05:22Z |
| publishDate | 2023-09-01 |
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| series | Remote Sensing |
| spelling | doaj.art-5b7878cb0d784a74ad221e7af49f7a162023-11-19T12:48:46ZengMDPI AGRemote Sensing2072-42922023-09-011518451210.3390/rs15184512A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power AssignmentYancui Duan0Sinong Quan1Hui Fan2Zhenhai Xu3Shunping Xiao4State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, ChinaState Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, ChinaCollege of Computer Science and Information Technology, Central South University of Forestry and Technology, Changsha 410004, ChinaState Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, ChinaState Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, ChinaThe model-based polarimetric decomposition is extensively studied due to its simplicity and clear physical interpretation of Polarimetric Synthetic Aperture Radar (PolSAR) data. Though there are many fine basic scattering models and well-designed decomposition methods, the overestimation of volume scattering (OVS) may still occur in highly oriented buildings, resulting in severe scattering mechanism ambiguity. It is well known that not only vegetation areas but also oriented buildings may cause intense cross-pol power. To improve the scattering mechanism ambiguity, an appropriate scattering model for oriented buildings and a feasible strategy to assign the cross-pol power between vegetation and oriented buildings are of equal importance. From this point of view, we propose a five-component decomposition method with a general rotated dihedral scattering model and an assignment strategy of cross-pol power. The general rotated dihedral scattering model is established to characterize the integral and internal cross-pol scattering from oriented buildings, while the assignment of cross-pol power between volume and rotated dihedral scattering is achieved by using an eigenvalue-based descriptor <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">D</mi><mrow><mi>OOB</mi></mrow></msub></mrow></semantics></math></inline-formula>. In addition, a simple branch condition with explicit physical meaning is proposed for model parameters inversion. Experiments on spaceborne Radarsat−2 C band and airborne UAVSAR L band PolSAR datasets demonstrate the effectiveness and advantages of the proposed method in the quantitative characterization of scattering mechanisms, especially for highly oriented buildings.https://www.mdpi.com/2072-4292/15/18/4512PolSARmodel-based polarimetric decompositionrotated dihedral scattering modelcross-pol poweroriented buildingsbranch condition |
| spellingShingle | Yancui Duan Sinong Quan Hui Fan Zhenhai Xu Shunping Xiao A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment Remote Sensing PolSAR model-based polarimetric decomposition rotated dihedral scattering model cross-pol power oriented buildings branch condition |
| title | A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment |
| title_full | A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment |
| title_fullStr | A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment |
| title_full_unstemmed | A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment |
| title_short | A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment |
| title_sort | five component decomposition method with general rotated dihedral scattering model and cross pol power assignment |
| topic | PolSAR model-based polarimetric decomposition rotated dihedral scattering model cross-pol power oriented buildings branch condition |
| url | https://www.mdpi.com/2072-4292/15/18/4512 |
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