| 机载LiDAR数据大区域城墙自动提取 |
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| 引用本文： | 王娅君,程亮,许浩,袁一,李满春.机载LiDAR数据大区域城墙自动提取[J].测绘科学,2017,42(4). |
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| 作者姓名： | 王娅君 程亮 许浩 袁一 李满春 |
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| 作者单位： | 南京大学地理与海洋科学学院,南京210008;南京大学江苏省地理信息技术重点实验室,南京210046 |
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| 摘 要： | 针对传统测量耗时耗力且难以获取古城墙精确侧面信息的缺点,该文提出将LiDAR技术应用于古城墙数字存档工作。提出基于城墙断面的"横向探测—纵向探测"城墙顶部和侧面点云提取算法,以及"城墙待选区提取—断面格网构建—顶部侧面点云提取"技术方案,有效地克服城墙特殊的空间形态和复杂的点云结构所带来的点云分割困难,实现大区域机载LiDAR数据城墙点云自动提取,解决了利用机载LiDAR进行古城墙数字存档的关键技术问题。基于南京明城墙的实验结果表明,该算法对于大区域古城墙提取切实可行有效。
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| 关 键 词： | 古城墙 数字存档 机载LiDAR 侧面细节 纵向探测 横向探测 |
Extraction of large area ancient city walls based on airborne LiDAR data |
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| WANG Yajun,CHENG Liang,XU Hao,YUAN Yi,LI Manchun.Extraction of large area ancient city walls based on airborne LiDAR data[J].Science of Surveying and Mapping,2017,42(4). |
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| Authors: | WANG Yajun CHENG Liang XU Hao YUAN Yi LI Manchun |
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| Abstract: | In view of the shortcoming that conventional measurement is time consuming and difficult to obtain accurate profile information of ancient city wall,this paper applied the LiDAR technology for the digital documentation of ancient city wall.A "horizontal detection-vertical detection" method and the "candidate area extraction-3D cross-section grid construction-city wall point extraction" technical solution were proposed to overcome the segmentation difficulty caused by the city walls' special space form and complex structure of point cloud and achieve large area city wall points automatically.The experimental results of city wall of Ming dynasty in Nanjing indicated that the proposed method is feasible and effective for large area ancient city wall extraction. |
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| Keywords: | ancient city walls digital documentation airborne LiDAR side detail vertical detection horizontal detection |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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