面向工程计算的岩体三维重建理论与方法研究

项目名称： 面向工程计算的岩体三维重建理论与方法研究

项目编号： No.61471338

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 肖俊

作者单位： 中国科学院大学

项目金额： 82万元

中文摘要： 面向工程计算的岩体三维重建是工程地质可视化和数值分析的重要基础。随着现代非接触测量设备在地质勘测领域的普及，基于点云的岩体三维重建已逐渐成为岩体三维重建领域的研究热点，并面临诸多亟待解决的问题，本项目将针对这些问题在以下四个方面展开关键技术研究：（1）利用基于语义的特征提取方法和相关机器学习理论等分析植被对岩体表面的遮挡问题，设计可靠鲁棒的岩体点云植被滤波算法，并借鉴图像修复理论分析滤波后导致的空洞问题，设计对应的空洞修复算法；（2）针对大规模海量点云的快速配准问题，建立基于最小配准集合的岩体点云高效配准模型；（3）研究并建立基于混合索引方法的海量点云三角化并行模型；（4）研究设计结合点云和图像处理的结构面自动提取算法和基于耦合机制的岩体三维重建算法，并据此完成面向工程计算的岩体三维重建原型系统。研究成果具有重要的科学意义和应用价值，并可直接应用到工程和科学计算中。

中文关键词： 三维重建；三维表面模型；计算机视觉；可视化；虚拟现实

英文摘要： 3D reconstruction of rock mass for engineering computation forms the basis of geological visualization and numerical analysis.With the popularity of modern non-contact measurement equipment for geological survey, 3D reconstruction of rock mass based on point cloud has been a research hotspot in the field of rock mass 3D reconstruction, which is faced up with several problems. Research is conducted on the following 4 aspects in this project for these problems: (1) a reliable and robust vegetation filter algorithm for rock mass point cloud is designed with the analysis of occlusion problem for the rock mass surface caused by vegetation by utilizing the feature extraction methods based on semantics and the machine learning theory, and a corresponding hole repair algorithm is proposed in order to solve the hole problem caused by filtering by referencing the image repair theory; (2) an effective registration model for rock mass point cloud is established based on a minimum registration set aiming at the fast registration problems of massive point cloud; (3) a parallel model of triangulation for massive point cloud based on hybrid indexing method is studied and constructed; (4) an automatic discontinuities extraction algorithm based on point cloud process and image process and a 3D reconstruction algorithm of rock mass based on coupling mechanism are studied and designed, based on which a rock mass 3D reconstruction primitive system for engineering computation is implemented. Achievements of this research have important meanings in sciences and applications, and can be directly used in the computation of engineering and sciences.

英文关键词： 3D reconstruciton;3D surface model;computer vision;visualization;virtual reality