基于激光点云的敦煌洞窟空间信息重建

Reconstructing the Spatial Information of Dunhuang Caves Based on Laser Point Cloud Analysis

本文针对敦煌石窟壁画数字化图像的形变问题及洞窟空间信息缺失情况,提出基于激光点云的洞窟空间信息重建方法。此方法以三维扫描仪采集到的洞窟点云信息为基准,结合强度图像,实现高分辨率壁画图像与洞窟三维空间的位置关联,并定位纠正壁画图像。本方法已在敦煌石窟壁画数字化实际工作中得到了应用,实现了多个洞窟的三维重建及单幅采集图像和整幅拼接图像的定位纠正与测量,其精度能满足文化遗产保护工作的需求。

In order to solve the deformation problem of digital images and the lack of spatial information on the Dunhuang caves, this paper proposes a method of spatial in formation reconstruction based on laser point cloud technology. Based on the point cloud information obtained from 3D laser scanner and composite images,this method can help obtain location association data between high resolution mural images and the relevant caves, as well as position rectification information for the murals. This method has already been used in digitizing murals in Dunhuang caves for the purposes of 3D reconstruction, image rectification, and the measurement of both separately pho tographed and composite mural images;it is believed that the precision and past success of these techniques are adequate for the demands of cultural heritage conservation.