一种基于LiDAR多视轮廓点的三维壁画变化检测方法  

Change Detection of 3D Mural Surface Based on Multi-view Contour Points of LiDAR Data

作　　者：肖开荣 孟庆祥[1,2] 杨鹤 龚元夫 XIAO Kairong;MENG Qingxiang;YANG He;GONG Yuanfu(School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,Hubei,China;Hubei Luojia Laboratory,Wuhan 430079,Hubei,China;Transportation Development Center of Henan Province,Zhengzhou 450003,Henan,China;Hubei Institute of Land Surveying and Mapping,Wuhan 430010,Hubei,China)

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079 [2]湖北珞珈实验室,湖北武汉430079 [3]河南省交通事业发展中心,河南郑州450003 [4]湖北省国土测绘院,湖北武汉430010

出　　处：《应用科学学报》2024年第5期733-746,共14页Journal of Applied Sciences

基　　金：湖北珞珈实验室研究团队基金(No.230700010);河南省重点研发项目“河南省公路车路空天一体化快速感知关键技术研究及应用”(No.2022-3-2)资助。

摘　　要：提出了一种三维壁画表面变化检测方法。首先通过点云配准和主成分分析算法处理壁画点云数据,利用高斯球映射在多视线方向提取特征轮廓线;然后结合体素网格移动和四维曲面拟合技术,实现对壁画几何变化的精确检测。实际应用结果证明,该方法在检测精度和效率上均有明显优势,对古文物保护与修复具有重要价值。In this paper,we propose a novel method for detecting changes in 3D mural surfaces.This method processes the mural point cloud data by point cloud alignment and principal component analysis(PCA)algorithm.It extracts the feature contour lines using Gaussian sphere mapping in the direction of multiple lines of sight.Combined with voxel grid shifting and four-dimensional surface fitting techniques,accurate detection of geometric changes of frescoes is achieved.The practical application results demonstrate significant advantages in detection accuracy and efficiency,which is of great value for the protection and restoration of ancient cultural relics.

关 键 词：三维壁画 点云 轮廓点 变化检测 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]