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
肖开荣 1孟庆祥 2杨鹤 3龚元夫4
作者信息
- 1. 武汉大学遥感信息工程学院,湖北武汉 430079
- 2. 武汉大学遥感信息工程学院,湖北武汉 430079;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
- 折叠
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.
Abstract
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Key words
three-dimensional mural/point cloud/contour points/change detection引用本文复制引用
基金项目
湖北珞珈实验室研究团队基金(230700010)
河南省重点研发项目(2022-3-2)
出版年
2024