机载激光雷达点云数据处理理论与应用研究606(2)

Total Station etc. Another option is to insert value to calculate by taking full

advantage of the point cloud around the "holes" and terrain similarity of the “holes”.

To insert value for dishevelled point cloud, besides Convex Delaunay Triangulation

linear interpolation, cubic interpolation, the nearest neighbor interpolation,

Biharmonic Spline Interpolation method (BSI) and radial base function (RBF) method

are introduced to interpolate the point cloud. On the other way, we present SVR as an

interpolation method to repair the point cloud. All of which enrich the interpolation

ways for point cloud data, this paper also submits a standard of evaluating

interpolation ways suitable for different terrain combining with related measure

criterion, not make a simple evaluation for interpolation form statistics.

Point cloud modeling is the core of point cloud processing. For TIN modeling to

point cloud, this paper adopts classic sub-governance arithmetic to configure network,

which achieved a good network configuration speed and quality, and also expounds

how to track the isoline and cut the section line according to TIN, Carries out a simple

tensile modeling for a house point cloud, and then makes the DSM model of point

cloud.

Based on the research results of above theories, we develop a point cloud

processing software PCEdit, which can be embedded in AutoCAD system as a

module.

Key Words：LIDAR，Point Cloud Filter，Point Cloud repairing， Biharmonic

Spline Interpolation，Radial Basis Function Interpolation

目 录

摘 要..............................................................................................................................................I

Abstract.........................................................................................................................................III

第一章

1.1

1.2

1.3

1.4

第二章

2.1

2.2

2.3

2.4

2.5

第三章 绪 论.............................................................................................................................1 引言...................................................................................................................................1 LIDAR数据处理现状.......................................................................................................1 课题研究背景和意义.......................................................................................................5 主要研究内容...................................................................................................................8 机载激光雷达点云数据获取理论.............................................................................10 点云数据获取原理.........................................................................................................10 点云数据获取方式.........................................................................................................11 点云数据结构.................................................................................................................12 点云数据坐标转换.........................................................................................................13 本章小结.........................................................................................................................17 机载激光雷达点云简化.............................................................................................18

3.1 点云处理流程.................................................................................................................18

3.2 点云输入.........................................................................................................................19

3.3 动态开窗技术.................................................................................................................22

3.4 点云数据简化.................................................................................................................25

3.4.1 LIDAR点云简化的必要性.....................................................................................25

3.4.2 点云简化现状.........................................................................................................27

3.4.3 多边形内点云简化.................................................................................................28

3.4.4 方格网法均匀简化点云.........................................................................................29

3.4.5 带状区域内点云简化.............................................................................................32

3.5 本章小结.........................................................................................................................34

第四章 机载激光雷达点云滤波处理.....................................................................................35

4.1 点云滤波原理.................................................................................................................35

4.2 点云滤波方法.................................................................................................................35

4.2.1 常用滤波方法.........................................................................................................36

4.2.2 移动窗口的坡度滤波和移动圆域的坡度滤波.....................................................41

4.3 双谐样条函数法滤波.....................................................................................................43

4.3.1 双谐样条函数法滤波原理.....................................................................................43

4.3.2 双谐样条函数滤波实例.........................................................................................45

4.4 本章小结.. …… 此处隐藏：5551字，全部文档内容请下载后查看。喜欢就下载吧 ……