点云影像图在历史保护建筑外立面测绘中的应用

Application of point cloud image in surveying and mapping of facade of the protected historic buildings

针对传统方法在测绘不规则复杂历史保护建筑外立面方面存在数据采集不全面、精度低、自动化程度和效率不高等问题,本文利用三维激光扫描技术进行历史保护建筑外立面点云数据的精细采集,并提出一种基于点云灰度影像和深度影像的历史保护建筑外立面快速绘图方法。以上海市某一优秀历史建筑的外立面测绘为例,详细阐述三维激光扫描点云数据处理过程中的关键技术,并验证本文方法的可行性,为历史建筑的数字化存档和规划保护提供基础数据与技术参考。

Aiming at the problems of incomplete data collection,low accuracy,low automation and efficiency of traditional methods in surveying and mapping of the facade of irregular and complex protected historic buildings,this paper uses 3D laser scanning technology to conduct fine collection of point cloud data of the facade of protected historic buildings,and proposes a new method based on point cloud gray image and depth image.Taking the facade mapping of an excellent historical building in Shanghai City as an example,the key technologies in the process of 3D laser scanning point cloud data processing are elaborated,and the feasibility of the proposed method is verified,so as to provide data basis and technical reference for the digital archiving and planning protection of historical buildings.