| 基于温岭市二类调查的航空影像正射纠正技术研究 |
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| 引用本文： | 林辉. 基于温岭市二类调查的航空影像正射纠正技术研究[J]. 西南林业大学学报, 2017, 37(3): 140-145.doi:10.11929/j.issn.2095-1914.2017.03.022 |
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| 作者姓名： | 林辉 |
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| 作者单位： | 国家林业局华东林业调查规划设计院, 浙江 杭州 310019 |
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| 基金项目： |
摘要:航空影像是二类调查的重要基础资料，但航空影像因地形等因素影响而产生畸变，使用前需要消除畸变进行正射纠正。本研究根据UltraCamX数字航摄相机的信息，在LPS工程中设置对应的参数，读入数据自带的外方位元素，直接对空三计算结果进行设定，对正射影像的定位精度以地形图为参照进行分析。结果表明：应用LPS就可以完成对数字航摄影像正射纠正，处理后的影像的匹配性较好，定位精度较高，效果较理想；通过检查点提取地形图和影像的对应坐标进行误差计算，平均总误差仅为1.249 m，可以满足温岭市森林资源二类调查的需要；该方法解决了航空影像数据量大、数量多、处理时间长、DEM使用等难题，对实际生产具有重要意义。 |
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| 摘 要： | 航空影像是二类调查的重要基础资料，但航空影像因地形等因素影响而产生畸变，使用前需要消除畸变进行正射纠正。本研究根据UltraCamX数字航摄相机的信息，在LPS工程中设置对应的参数，读入数据自带的外方位元素，直接对空三计算结果进行设定，对正射影像的定位精度以地形图为参照进行分析。结果表明：应用LPS就可以完成对数字航摄影像正射纠正，处理后的影像的匹配性较好，定位精度较高，效果较理想；通过检查点提取地形图和影像的对应坐标进行误差计算，平均总误差仅为1.249 m，可以满足温岭市森林资源二类调查的需要；该方法解决了航空影像数据量大、数量多、处理时间长、DEM使用等难题，对实际生产具有重要意义。
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| 关 键 词： | LPS UCX 正射纠正 数字摄影测量 图像处理 |
| 收稿时间： | 2016-03-13 |
Orthographical Rectification Technology for Aerial Images in Forest Management Inventory in Wenling City |
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| Hui Lin, Orthographical Rectification Technology for Aerial Images in Forest Management Inventory in Wenling City[J]. Journal of Southwest Forestry University, 2017, 37(3): 140-145.doi:10.11929/j.issn.2095-1914.2017.03.022 |
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| Authors: | Hui Lin |
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| Affiliation: | East China Forestry Planning and Design Institute, State Forestry Administration, Hangzhou Zhejiang 321001, China |
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| Abstract: | Aerial images are important fundamental materials for forest management inventory. However, they easily produce distortion under influences of topographic and the other factors. Therefore, it′s necessary to conduct orthorectification before using them to eliminate distortion. The study based on the information gained by UltraCamX digital aerophotographic camera, set up corresponding parameters in LPS project, read in exterior orientation elements carried by data, directly set triangulation escaping from troublesome calculation process. The positional precision of orthophoto, with reference to topographic maps, was analyzed. And the result showed, LPS could support orthorectification of digital aerophotographic image, the processed image was relatively ideal with good matching and high positioning accuracy. The error was calculated by the corresponding coordinates of topographic maps and images from the checkpoint and the average overall error was only 1.249 m, which could met the needs of forest management inventory in Wenling. The method has great significance in practical application for it could solve the problems of large amount of digital aerophotographic images, long processing time, and the use of DEM, etc. |
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| Keywords: | LPS UCX orthorectification digital photogrammetry image processing |
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