Enhanced 3-D Reconstruction Method for Polarimetric Coherent Optimal-Based Tomographic SAR
Tomographic synthetic aperture radar (TomoSAR) technology has become one of the important means to obtain 3-D information of urban buildings. With the continuous development of SAR technology, TomoSAR also has full-polarization reception capabilities, known as polarimetric tomographic SAR (PolTomoSA...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10801224/ |
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| Summary: | Tomographic synthetic aperture radar (TomoSAR) technology has become one of the important means to obtain 3-D information of urban buildings. With the continuous development of SAR technology, TomoSAR also has full-polarization reception capabilities, known as polarimetric tomographic SAR (PolTomoSAR). However, in the practical application, there are relatively few models and algorithms for full-polarized SAR joint 3-D imaging. To address this issue, this article proposes a 3-D imaging method based on polarization coherent optimization for TomoSAR. This method can fully utilize the full-polarization information, process multichannel 2-D images with coherent optimization, and further improve the quality of 3-D point cloud. First, the polarization scattering vectors and polarization coherent cross-correlation matrices are constructed, and a generalized eigenvalue equation is established to solve the eigenvectors. Then, the optimal polarization vectors are normalized and phase-corrected. Finally, high-quality 3-D reconstruction results of buildings are obtained through 3-D reconstruction and coordinate transformation, as well as point cloud filtering. Moreover, the adaptive iterative method is employed during the processing. The effectiveness of the proposed method is validated through the acquisition and processing of full-polarization P-band TomoSAR system data from the Dunhuang residential area and full-polarization Ku-band TomoSAR system data from the Suzhou Research Institute building. The results demonstrate the feasibility and superiority of airborne full-polarization TomoSAR with proposed method for high-precision 3-D reconstruction of urban buildings and other applications. |
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| ISSN: | 1939-1404 2151-1535 |