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| 利用 LiDAR 点云提取有地形约束的光滑海岸线 | |
| 引用本文： | 董保根,张良,张钢,吴卓,周丽雅.利用 LiDAR 点云提取有地形约束的光滑海岸线[J].测绘科学技术学报,2012(2):113-117. |
| 作者姓名： | 董保根 张良 张钢 吴卓 周丽雅 |
| 作者单位： | 1. 信息工程大学测绘学院,河南郑州450052 2. 武汉大学遥感信息工程学院,湖北武汉430079 3. 部队,新疆乌鲁木齐830006 4. 部队,辽宁大连116023 |
| 基金项目： | 江西省数字国土重点实验室开放研究基金项目(DLLJ201111;DLLJ201112) |
| 摘 要： | 针对传统海岸线提取算法误差大、在地形突变区域形变大的缺点,提出了一种基于离散 LiDAR 点云提取有地形约束海岸线的方法.首先,通过离散点云构建约束三角网,减少内插规则格网的误差并且保证海岸线不穿越地形结构;其次,进行顾及地形结构的点云高程修正,在数据源上缓解海岸线的平滑问题;最后采取二次多项式法消除毛刺,利用动态阈值张力样条函数内插生成光滑海岸线. |
| 关 键 词： | LiDAR点云 海岸线 约束三角网 二次多项式 张力样条函数 |
Smooth Shoreline Extraction with Topographic Constraints Using LiDAR Point Clouds |
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| DONG Baogen,ZHANG Liang,ZHANG Gang,WU Zhuo,ZHOU Liya.Smooth Shoreline Extraction with Topographic Constraints Using LiDAR Point Clouds[J].Journal of Zhengzhou Institute of Surveying and Mapping,2012(2):113-117. | |
| Authors: | DONG Baogen ZHANG Liang ZHANG Gang WU Zhuo ZHOU Liya |
| Institution: | 1(1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China; 2.School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China; 3.69028 Troops,Wulumuqi 830006,China;4.65015 Troops,Dalian 116023,China) |
| Abstract: | Due to the shortcomings of traditional algorithms of shoreline extraction,especially in coast areas with great hypsography changes,a method for extracting shoreline with topographic constraints from LiDAR point clouds data was developed.Firstly,a constrained delaunay triangulation was constructed for the purpose of reducing errors when interpolating regular grids and ensuring the shorelines did not cross terrain structures.Secondly,taking the terrain structures into account,elevation revision for point clouds was performed to relieve the shoreline smoothing problem in the data source.Finally,a quadratic polynomial algorithm was used to eliminate burr and subsequently the smooth shoreline was derived by using tension spline function interpolation of dynamic thresholds. |
| Keywords: | LiDAR point clouds shoreline constrained delaunay triangulation quadratic polynomial tension spline function |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |