| LiDAR数据滤波中基于切片的断裂线优化方法 |
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| 引用本文： | 毛卫华,秦爽,付挺芳,祝彦敏.LiDAR数据滤波中基于切片的断裂线优化方法[J].测绘通报,2017,0(9):75. |
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| 作者姓名： | 毛卫华 秦爽 付挺芳 祝彦敏 |
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| 作者单位： | 1. 浙江省测绘科学技术研究院, 浙江 杭州 310012;2. 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉 430079;3. 长兴宏达测绘有限公司, 浙江 长兴 313100 |
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| 基金项目： | 国家科技支撑计划课题，国家自然科学基金，浙江省科技计划，测绘地理信息公益性科研专项 |
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| 摘 要： | 为了克服一般自动滤波算法对复杂地形的不适应性而产生大量误分的现象，提出了基于切片数据的LiDAR数据线分类滤波算法。该算法利用人眼对地形判断的先验知识，并使用多层次自适应高度阈值的滤波方法得到初始滤波结果，再利用三维空间中的角度特性进行优化，从而对断裂线地形能取得很好的滤波效果。最后采用VC++编程实现了本文提出的线分类算法，并经过试验分析比较，证明了该算法的适用性，能够适应高精度DEM的快速制作。
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| 关 键 词： | 机载LiDAR 点云 DEM 滤波 线分类 |
| 收稿时间： | 2016-12-16 |
Optimization Method Based on the Sliced Breakline in Filtering of LiDAR Data |
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| MAO Weihua,QIN Shuang,FU Tingfang,ZHU Yanmin.Optimization Method Based on the Sliced Breakline in Filtering of LiDAR Data[J].Bulletin of Surveying and Mapping,2017,0(9):75. |
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| Authors: | MAO Weihua QIN Shuang FU Tingfang ZHU Yanmin |
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| Institution: | 1. Zhejiang Academy of Surveying and Mapping, Hangzhou 310012, China;2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;3. Changxing Hongda Surveying and Mapping Co.Ltd., Changxing 313100, China |
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| Abstract: | In order to overcome the large number of misclassification errors caused by the general automatic filtering algorithm for complex terrain, the paper proposes a line classification algorithm for LiDAR data based on slice data.The algorithm uses a priori knowledge of the terrain of human judgment and multi-level automatic filtering method and high threshold to obtain the initial filtering result.Then the angle characteristics of 3D space are used to optimize the result.Finally we can achieve a good filtering effect on the breakline terrain.In this paper we use the VC++programming to realize the algorithm of line classification, and prove the applicability of the algorithm through experimental analysis and comparison, which can adapt to the rapid production of high precision DEM. |
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| Keywords: | airborne LiDAR point cloud DEM filter line classification |
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