摘要
采用三维激光扫描技术采集隧道内壁影像,需要解决的问题主要在于数据的采集与投影变换.提出了一种基于分段圆柱等角正切投影的算法,利用三维扫描数据插值生成隧道内壁的投影展开影像图,通过试验数据验证该方法的可靠性,证明该正射影像分辨率优于1cm,具有精确的坐标量测和病害信息判读功能.
An algorithm for orthophoto generation of tunnel inner walls is proposed in this paper based on 3D laser scanning data. Firstly,the basic methods of acquisition and pre-processing 3D laser scanning data are introduced. Then,with the pre-processed scanning data,a algorithm of cylindrical segment angles tangent projection is proposed. Finally,with the proposed model,the orthophoto of the tunnel inner wall is generated by calculating the 3D scanning data. The results show that the resolution of the orthophoto is better than 1cm with functions of precise coordinates measuring and disease information interpreting.
出处
《浙江水利水电学院学报》
2016年第1期58-62,共5页
Journal of Zhejiang University of Water Resources and Electric Power
关键词
三维激光扫描
正射投影
隧道
病害信息
圆柱
three-dimensional laser scanning
orthographic projection
tunnels
disease information
cylinder
