测绘学报 ›› 2017, Vol. 46 ›› Issue (12): 1950-1958.doi: 10.11947/j.AGCS.2017.20170052

• 摄影测量学与遥感 • 上一篇    下一篇

非直视区域的普通平面镜辅助地面三维激光扫描方法

张帆1, 黄印1, 黄先锋1,2,3, 徐思奇1   

  1. 1. 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉 430079;
    2. 地理空间信息技术协同创新中心, 湖北 武汉 430079;
    3. 数字云冈联合实验室, 山西 大同 037000
  • 收稿日期:2017-02-08 修回日期:2017-10-30 出版日期:2017-12-20 发布日期:2017-12-28
  • 通讯作者: 黄先锋 E-mail:hwangxf@qq.com
  • 作者简介:张帆(1982-),男,博士,副教授,研究方向为激光扫描、摄影测量、三维重建。E-mail:zhangfan@whu.edu.cn
  • 基金资助:
    国家自然科学基金(41571437);国家科技支撑计划课题(2014BAK07B04)

3D Laser Scanning Assisted by Ordinary Plane Mirror for Non-direct Viewing Area

ZHANG Fan1, HUANG Yin1, HUANG Xianfeng1,2,3, XU Siqi1   

  1. 1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote sensing, Wuhan University, Wuhan 430079, China;
    2. Collaborative Innovation Center of Geospatial Technology, Wuhan University, Wuhan 430079, China;
    3. Laboratory of Digital Yungang;Datong 037000, China
  • Received:2017-02-08 Revised:2017-10-30 Online:2017-12-20 Published:2017-12-28
  • Supported by:
    The National Natural Science Foundation of China (No. 41571437),The National Key Technology Research and Development Program of the Ministry of Science and Technology of China (No. 2014BAK07B04)

摘要: 地面三维激光扫描是获取对象表面几何信息的主要方法之一,扫描对象的完整性是三维激光扫描数据获取的基本要求。为解决实际扫描过程中,因作业空间受限等原因引起的扫描死角而导致点云缺失的问题,本文根据平面镜反射光线原理提出了针对非直视区域的普通平面镜辅助激光扫描数据的获取方法。分析了普通平面镜对激光光束传播路径与距离的影响机理,推导了激光扫描经普通平面镜反射像点对应的物点坐标解算方程;顾及激光扫描特性,设计了包含球标靶和普通平面镜的镜面反射系统,阐述了系统构建、系统检校与系统坐标系构建方法;并通过试验验证了本方法的可行性和精度。

关键词: 激光扫描, 镜面反射系统, 非直视区域, 球标靶, 像点解算

Abstract: Terrestrial 3D laser scanning is one of principal methods to get the geometric information of object surface,and the integrity of the scanned object is a basic requirement in data acquisition. In order to solve the missing point cloud problem due to the scanning dead angle caused by confined working space,this paper proposes a method using ordinary plane mirror to obtain laser scanning data for non-direct viewing area according to the plane mirror reflection principle,analyzes the influence mechanism of the ordinary plane mirror on the propagation path and distance of laser beam,deduces the coordinate equation of the object point corresponding to the image point reflected by ordinary plane mirror in laser scanning. Given the laser scanning characteristic,this paper introduces a mirror reflection system included target balls and ordinary plane mirror,and expounds the system construction,system calibration and constructing method of system coordinate system. The feasibility and precision of the method are verified by experiments.

Key words: laser scanning, specular reflection system, non-line-of-sight area, ball target, point calculation

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