项目名称: 基于地面Lidar点云的岩体结构面快速提取方法
项目编号: No.41301434
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 韩贤权
作者单位: 长江水利委员会长江科学院
项目金额: 25万元
中文摘要: 结构面是构成岩体结构并控制岩体力学性质的基本单元,正确识别并快速准确提取岩体结构面是工程开挖过程中评价岩体地质特性的重要基础。由于岩体结构面特征不规则且十分复杂,常规的提取方法可靠性较差、自动化程度较低且容易隐藏与岩体边缘垂直的结构面信息等问题日益突出。本项目提出基于地面Lidar点云的岩体结构面快速提取方法,主要研究内容包括:分析归纳岩体结构面在Lidar点云中呈现的特征,系统研究快速提取结构面的点云分割方法,针对已有点云分割方法在岩体结构面提取中容易出现欠分割和过分割等问题,提出用八叉树对复杂、不规则点云数据进行高效组织的预处理方法和顺序法向量检测机制的特征聚类分割方法,在保证置信度和精确度的前提下快速、准确提取岩体结构面的平面模型,避免出现错误的提取结果。该研究成果可作为核心技术广泛应用于自动化地质编录,为工程开挖过程中岩体结构面的快速、准确、自动提取提供新的有效途径。
中文关键词: 地面Lidar;岩体结构面;点云配准;点云分割;结构面提取
英文摘要: Discontiniuty is the elementary unit that constitutes rock mass structure and determines mechanical properties of rock mass.To identify correctly and extract quickly and accurately is the important basis for evaluating the geological characteristics of rock mass in the excavation process.Since the characteristics of discontiniuty are complex and irregular, the problems such as the conventional extracting method whose reliability is poorer is lowly automated and the information of structural surface perpendicular to rock edge is easily missed are increasing prominent.This application advances a kind of fast extraction method for the rock mass discontiniuty, based on terrestrial Lidar point clouds.The main content of this research includes the analysis and induction of the features of rock mass discontiniuty presenting in Lidar point clouds, systematical research on the point clouds segmentation method for extracting discontiniuty fast.Aiming at problems of under-segmentation or over-segmentation leading to incorrect results in the existing segmentation methods, this research raises a pretreatment method using octree to organize the complex and irregular point clouds data efficiently,and another feature clustering segmentation method utilizing sequential vector detection mechanism,which can extract the rock mass
英文关键词: Terrestrial Lidar;Rock Discontinuity;Registration;Segmentation;Discontinuity Extracting