Fine Deformation Monitoring of Ancient Building Based on Terrestrial Laser Scanning Technologies

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Wei, Zhou^1,2 ; Huadong, Guo^1,2 ; Qi, Li^1,2 ; Tianhua, Hong^1,2

Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, No. 9 Dengzhuang South Road Haidian District, Beijing 100094, China^1

Intl. Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO, No. 9 Dengzhuang South Road Haidian District, Beijing 100094, China^2

关键词: Close range photogrammetry;    Deformation monitoring;    Ellipse fitting algorithms;    Laser scanning technology;    Registration error;    Terrestrial laser scanning;    Three-dimensional model;    Virtual reality technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012166/pdf
DOI  :  10.1088/1755-1315/17/1/012166

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Laser scanning technology has been widely used to build high-precision three dimensional models in the preservation of ancient buildings. In this paper, we take the Tower of Buddhist Incense in the Summer Palace as our research subject. Combining laser scanning technologies with close-range photogrammetry, GIS and virtual reality technologies, we acquired comprehensive and high accuracy geospatial data of the tower, and built the 3D models with an average measurement error of a single point less than 2 millimeters and a registration error of 3D data less than 5 millimeters. After data registration of the whole tower with high-precision, deformation monitoring was conducted. Having been repaired many times, the cross-sections of the tower's pillars are not in a circular shape. In order to know the dip and dip direction of each pillar exactly, ellipse fitting algorithm was used to calculate the location of the centre of every pillar. And then, the coordinates of the pillars' centre points, the major and minor axes of the ellipses, and rotation angles were calculated. The technologies and methodology used in this paper could significantly contribute towards the long-term protection of endangered cultural relics using measurements and modelling with high-levels of scientific precision.