Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation
Correcting the relative geometric errors is an essential step in the generation of digital ortho maps and digital surface models from GaoFen-7 (GF-7) regional images, in which the block adjustment (BA) technology is always adopted. However, the traditional BA methods are typically ineffective and no...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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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/9763008/ |
| _version_ | 1811305662105255936 |
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| author | Yingdong Pi Bo Yang Xin Li Mi Wang |
| author_facet | Yingdong Pi Bo Yang Xin Li Mi Wang |
| author_sort | Yingdong Pi |
| collection | DOAJ |
| description | Correcting the relative geometric errors is an essential step in the generation of digital ortho maps and digital surface models from GaoFen-7 (GF-7) regional images, in which the block adjustment (BA) technology is always adopted. However, the traditional BA methods are typically ineffective and not universal due to their dependence on sufficient control data. Although recently developed BA methods using a large number of observation images can substantially eliminate the additional control data, they are not suitable for the BA with few images in the absence of sufficient control data, which is a situation that is often encountered in practical applications. In such situation, the inevitable elevation error caused by the initial positioning error of images will transfer and accumulate in the horizontal direction of the block, resulting in the inconsistent geometric accuracies among images. Aiming at this problem, this article proposed a practical method of combining a stable free BA and <italic>a posteriori</italic> compensation. Through the stepwise correction and integration of geometric errors, the elevation error and its cumulative effect in free BA could be eliminated at a small control cost, and a robust result with consistent accuracy could be achieved, even with only a few observation images. This method was validated through experiments performed on GF-7 stereo images, and the satisfactory results indicated that it effectively restrained error accumulation and improved the geo-positioning consistency of regional GF-7 images. |
| first_indexed | 2024-04-13T08:29:22Z |
| format | Article |
| id | doaj.art-c8c482173b0140619e286e8d7b2cd3d1 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-04-13T08:29:22Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-c8c482173b0140619e286e8d7b2cd3d12022-12-22T02:54:18ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352022-01-01153224323410.1109/JSTARS.2022.31694749763008Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori CompensationYingdong Pi0https://orcid.org/0000-0003-4092-1544Bo Yang1Xin Li2Mi Wang3https://orcid.org/0000-0003-2799-5987State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, and School of Resource and Environmental Sciences, Wuhan University, Wuhan, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, and School of Resource and Environmental Sciences, Wuhan University, Wuhan, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, and School of Resource and Environmental Sciences, Wuhan University, Wuhan, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, and School of Resource and Environmental Sciences, Wuhan University, Wuhan, ChinaCorrecting the relative geometric errors is an essential step in the generation of digital ortho maps and digital surface models from GaoFen-7 (GF-7) regional images, in which the block adjustment (BA) technology is always adopted. However, the traditional BA methods are typically ineffective and not universal due to their dependence on sufficient control data. Although recently developed BA methods using a large number of observation images can substantially eliminate the additional control data, they are not suitable for the BA with few images in the absence of sufficient control data, which is a situation that is often encountered in practical applications. In such situation, the inevitable elevation error caused by the initial positioning error of images will transfer and accumulate in the horizontal direction of the block, resulting in the inconsistent geometric accuracies among images. Aiming at this problem, this article proposed a practical method of combining a stable free BA and <italic>a posteriori</italic> compensation. Through the stepwise correction and integration of geometric errors, the elevation error and its cumulative effect in free BA could be eliminated at a small control cost, and a robust result with consistent accuracy could be achieved, even with only a few observation images. This method was validated through experiments performed on GF-7 stereo images, and the satisfactory results indicated that it effectively restrained error accumulation and improved the geo-positioning consistency of regional GF-7 images.https://ieeexplore.ieee.org/document/9763008/Elevation errorfree block adjustment (BA)GaoFen-7 (GF-7) regional imagesposteriori compensationrelative geometric error |
| spellingShingle | Yingdong Pi Bo Yang Xin Li Mi Wang Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Elevation error free block adjustment (BA) GaoFen-7 (GF-7) regional images posteriori compensation relative geometric error |
| title | Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation |
| title_full | Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation |
| title_fullStr | Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation |
| title_full_unstemmed | Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation |
| title_short | Robust Correction of Relative Geometric Errors Among GaoFen-7 Regional Stereo Images Based on Posteriori Compensation |
| title_sort | robust correction of relative geometric errors among gaofen 7 regional stereo images based on posteriori compensation |
| topic | Elevation error free block adjustment (BA) GaoFen-7 (GF-7) regional images posteriori compensation relative geometric error |
| url | https://ieeexplore.ieee.org/document/9763008/ |
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