联立偏度与峰度变化曲线的机载LiDAR点云滤波方法

详细信息    查看全文 | 推荐本文 |

英文篇名：A Filtering Method of Airborne LiDAR Point Cloud Based on the Curve of Skewness and Kurtosis Change 作者：孙蒙 ; 顾和和 英文作者：SUN Meng;GU Hehe;School of Environment Science and Spatial Informatics, China University of Mining and Technology; 关键词：机载激光雷达 ; 偏度平衡 ; 峰度平衡 ; 变化曲线 ; 曲面拟合 英文关键词：LiDAR;;skewness balance;;kurtosis balance;;change curves;;curved surface fitting 中文刊名：JFJC 英文刊名：Journal of Geomatics Science and Technology 机构：中国矿业大学环境与测绘学院; 出版日期：2016-05-13 14:09 出版单位：测绘科学技术学报 年：2016 期：v.33 基金：“十二五”农村领域国家科技计划课题(2012BAJ22B00);; 江苏高校优势学科建设工程项目(SZBF2011-6-B35) 语种：中文; 页：JFJC201601011 页数：5 CN：01 ISSN：41-1385/P 分类号：52-56

摘要

针对经典滤波算法易受参数、阈值选取影响以及传统偏度平衡方法滤波结果不理想等问题,提出一种联立偏度与峰度变化曲线的机载LiDAR点云二次滤波方法。该方法不受参数与阈值选取影响,在联立初始LiDAR点云二者基础上,通过在其变化曲线上寻找最优偏度平衡点完成一次滤波;然后对初次滤波后获取地面点进行多项式曲面拟合,根据拟合后的高差统计值进行偏度平衡二次滤波。实验结果表明:该方法能保证变化很小的前提下,减少和总误差,滤波效果更好。
        In order to solve the problems which the classic filtering algorithms are easily affected by the selection of parameters and threshold values and the results of the traditional skewness balance filtering method are not very good, so a filtering method of airborne LiDAR point cloud based on the curve of skewness and kurtosis change was put forward in this paper. This method is based on the skewness and kurtosis of original LiDAR point cloud,through the changing curve to find the optimal point of skewness balance. Then the secondary filter is based on the skewness balance of elevation difference values, which get from polynomial surface fitting. Finally, the experimental results showed that this method could reduce the class errors and the total errors under the premise that the class error change was very small, so the filtering results are better.

引文

[1]KILIAN J,HAALA N,ENGLICH M.Caplure and evaluation of airborne laser data[C]∥International Archives of Photogrammetry and Remote Sensing.Vienna,1996,32(B3)383-388.
    [2]罗伊萍,姜挺,龚志辉.基于自适应和多尺度数学形态学的点云数据滤波方法[J].测绘科学技术学报,2009,26(6):426-429.LUO Y P,JIANG T,GONG Z H.An adaptive and multi-scale mathematic morphological filter for point cloud data filtering[J].Journal of Geomatics Science and Technology,2009,26(6):426-429.
    [3]VOSSELMAN G.Slope based filtering of laser altimetry data[C]∥International Archives of Photogrammetry and Remote Sensing.Amsterdam,1999,33(B3):935-942.
    [4]FILIN S,PFEIFER N.Segmentation of airborne laser scanning data using a slope adaptive neighborhood[J].ISPRS Journal of Photogrammetry and Remote Sensing,2006,60(2):71-80.
    [5]AXELSSON P.DEM generation from laser scanner data using adaptive TIN models[J].International Archives of Photogrammetry,Remote Sensing and Spatial Information Sciences,2000,3(B3):119-126.
    [6]KRAUS K,PFEIFER N.Determination of terrain models in wooded areas with airborne laser scanner data[J].ISPRS Journal of Photogrammetry and Remote Sensing,1998,3(4):193-203.
    [7]SOHN G,DOWMAN I.Terrain surface reconstruction by the use of tetrahedron model with the MDL Criterion[C]∥International Archives of Photogrammetry,Remote Sensing and Spatial Information Sciences.Graz,2002,35(B3):336-344.
    [8]隋立春,张熠斌,张硕,等.基于渐进三角网的机载Li DAR点云数据滤波[J].武汉大学学报:信息科学版,2011,36(10):1159-1163.SUI L C,ZHANG Y B,ZHANG S,et al.Filtering of airborne Li DAR point cloud data based on progressive TIN[J].Geomatics and Information Science of Wuhan University,2011,36(10):1159-1163.
    [9]BARTELS M,HONG W.Segmentation of LIDAR data using measures of distribution[J].International Archives of Photogrammetry,Remote Sensing and Spatial Information Sciences,2000,36(7):426-431.
    [10]BAO Y F,LI G P,CAO C X,et al.Classification of LIDAR point cloud and generation of DTM from LIDAR height and intensity data in forested area[J].International Archives of Photogrammetry,Remote Sensing and Spatial Information Sciences,2008,37(B3):313-318.
    [11]CROSILLA F,MACORIG D,SCAIONI M,et al.Li DAR data filtering and classification by skewness and kurtosis iterative analysis of multiple point cloud data categories[J].Applied Geomatics,2013,5(3):225-240.
    [12]董宝根,秦志远,陈静.无需阈值支持的机载Li DAR点云数据滤波方法[J].计算机工程与应用,2013,49(15):219-223.DONG B G,QIN Z Y,CHEN J.Threshold-free method for airborne Li DAR point clouds data filtering[J].Computer Engineering and Applications,2013,49(15):219-223.