Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar
Traditional two-dimensional radar images can only reflect the target azimuth and slant range and thus suffer problems of geometric deformation and overlapping. The unique three-dimensional (3D) imaging capability of ground-based real-aperture radar can more accurately and directly achieve correlatio...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/10/3511 |
| _version_ | 1797533688064376832 |
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| author | Hao Zhang Xiaolin Yang Feng Yang Haitao Ma Zhengxing Yu Xiangtian Zheng Yuan Sun |
| author_facet | Hao Zhang Xiaolin Yang Feng Yang Haitao Ma Zhengxing Yu Xiangtian Zheng Yuan Sun |
| author_sort | Hao Zhang |
| collection | DOAJ |
| description | Traditional two-dimensional radar images can only reflect the target azimuth and slant range and thus suffer problems of geometric deformation and overlapping. The unique three-dimensional (3D) imaging capability of ground-based real-aperture radar can more accurately and directly achieve correlation between the radar image and the slope monitoring scenarios, thus providing reliable information for the early warning and forecasting of landslides and collapse disasters. The latest method of selecting a slope target from a high-resolution range profile includes two indexes: maximum amplitude and coherence, which will affect the accuracy of displacement measurement when there is an interference target. We present a three-dimensional slope imaging method based on smoothness constraints. On the basis of the latest method, the objective fact of the practically smooth and continuous distribution of slope surfaces is considered. This method can be used for image interpretation on strongly scattered targets within the slope. The independently developed ground-based real-aperture slope radar system was deployed in the Heidaigou Open-Pit Coal Mine in Inner Mongolia to carry out 3D slope imaging experiments. The effectiveness of this method in slope monitoring and imaging was confirmed by comparing the surface roughness and the spatial positions of the targets with the high-density point cloud data in the projective plane obtained during the same time period. We used RMSE function and roughness as two measures. It shows that the method presented in this paper is more suitable for actual three-dimensional slope imaging. |
| first_indexed | 2024-03-10T11:18:13Z |
| format | Article |
| id | doaj.art-88051bf70a074c089c053577e598c02c |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T11:18:13Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-88051bf70a074c089c053577e598c02c2023-11-21T20:14:51ZengMDPI AGSensors1424-82202021-05-012110351110.3390/s21103511Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture RadarHao Zhang0Xiaolin Yang1Feng Yang2Haitao Ma3Zhengxing Yu4Xiangtian Zheng5Yuan Sun6School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaChina Academy of Safety Science and Technology, Beijing 100012, ChinaSchool of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaChina Academy of Safety Science and Technology, Beijing 100012, ChinaChina Academy of Safety Science and Technology, Beijing 100012, ChinaSchool of Earth Science and Engineering, Hohai University, Nanjing 211100, ChinaSchool of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaTraditional two-dimensional radar images can only reflect the target azimuth and slant range and thus suffer problems of geometric deformation and overlapping. The unique three-dimensional (3D) imaging capability of ground-based real-aperture radar can more accurately and directly achieve correlation between the radar image and the slope monitoring scenarios, thus providing reliable information for the early warning and forecasting of landslides and collapse disasters. The latest method of selecting a slope target from a high-resolution range profile includes two indexes: maximum amplitude and coherence, which will affect the accuracy of displacement measurement when there is an interference target. We present a three-dimensional slope imaging method based on smoothness constraints. On the basis of the latest method, the objective fact of the practically smooth and continuous distribution of slope surfaces is considered. This method can be used for image interpretation on strongly scattered targets within the slope. The independently developed ground-based real-aperture slope radar system was deployed in the Heidaigou Open-Pit Coal Mine in Inner Mongolia to carry out 3D slope imaging experiments. The effectiveness of this method in slope monitoring and imaging was confirmed by comparing the surface roughness and the spatial positions of the targets with the high-density point cloud data in the projective plane obtained during the same time period. We used RMSE function and roughness as two measures. It shows that the method presented in this paper is more suitable for actual three-dimensional slope imaging.https://www.mdpi.com/1424-8220/21/10/3511slope monitoringground-based real-aperture radarsmoothness constraintthree-dimensional imaging |
| spellingShingle | Hao Zhang Xiaolin Yang Feng Yang Haitao Ma Zhengxing Yu Xiangtian Zheng Yuan Sun Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar Sensors slope monitoring ground-based real-aperture radar smoothness constraint three-dimensional imaging |
| title | Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar |
| title_full | Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar |
| title_fullStr | Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar |
| title_full_unstemmed | Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar |
| title_short | Three-Dimensional Slope Imaging Method for Ground-Based Real-Aperture Radar |
| title_sort | three dimensional slope imaging method for ground based real aperture radar |
| topic | slope monitoring ground-based real-aperture radar smoothness constraint three-dimensional imaging |
| url | https://www.mdpi.com/1424-8220/21/10/3511 |
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