基于轨道移动激光扫描的圆形隧道正射影像纠正算法  

An orthoimage correction algorithm for circular tunnel based on track moving laser scanning

作　　者：阮东旭 姚连璧 许正文 张绍华 聂顺根 Ruan Dongxu;Yao Lianbi;Xu Zhengwen;Zhang Shaohua;Nie Shungen(College of Surveying and Geo-informatics,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学测绘与地理信息学院,上海200092

出　　处：《工程勘察》2021年第1期41-46,53,共7页Geotechnical Investigation & Surveying

基　　金：“十三五”国家重点研发计划资助项目(2016YFB1200602-02);国家自然科学基金项目(41771482)。

摘　　要：高质量的隧道内壁影像是隧道病害检测的基础,而基于轨道移动激光扫描技术采集的圆形隧道内壁影像,在断面方向和运动方向上存在较大的影像长度误差。本文提出一种基于轨道移动激光扫描的圆形隧道正射影像纠正算法,利用速度纠正和正射投影纠正,插值激光扫描数据生成隧道内壁影像。经实验证明,该算法可有效纠正圆形隧道内壁影像在断面方向和运动方向上的长度误差,使影像具有较为精确的面积量测和病害信息判读功能。High quality inner wall images are the basis of tunnel disease detection,but the inner wall images acquired based on track moving laser scanning technology have scale errors in both section direction and moving direction. In this paper,an orthophoto correction algorithm based on orbit moving laser scanning is proposed,which uses velocity correction and orthophoto correction to interpolate laser scanning data to further generate the image of the inner wall of the tunnel. Experiments show that this algorithm can correct scale error of the circular tunnel inner wall image in the direction of section and motion effectively,and the image has the function of more accurate area and interpretation of disease.

关 键 词：圆形隧道内壁影像 移动激光扫描 速度纠正 正射投影纠正 

分 类 号：U456[建筑科学—桥梁与隧道工程]