测绘学报 ›› 2015, Vol. 44 ›› Issue (4): 431-437.doi: 10.11947/j.AGCS.2015.20130357

• 摄影测量学与遥感 • 上一篇    下一篇

球形标靶的固定式扫描大点云自动定向方法

姚吉利1, 马宁1, 贾象阳1, 徐广鹏1, 谢建春2   

  1. 1. 山东理工大学建筑工程学院, 山东 淄博 255000;
    2. 山东省地质测绘院, 山东 济南 250014
  • 收稿日期:2013-12-25 修回日期:2014-11-24 出版日期:2015-04-20 发布日期:2015-04-27
  • 作者简介:姚吉利(1964—),男,教授,主要从事三维激光扫描数据处理方面的研究.E-mail:ysy_941123@sdut.edu.cn
  • 基金资助:
    国家自然科学基金(41074001)

An Approach for Automatic Orientation of Big Point Clouds from the Stationary Scanners Based on the Spherical Targets

YAO Jili1, MA Ning1, JIA Xiangyang1, XU Guangpeng1, XIE Jianchun2   

  1. 1. School of Architectural Engineering, Shandong University of Technology, Zibo 255000, China;
    2. Geological Surveying & Mapping Institute of Shandong Province, Jinan 250014, China
  • Received:2013-12-25 Revised:2014-11-24 Online:2015-04-20 Published:2015-04-27
  • Supported by:
    The National Natural Science Foundation of China(No.41074001)

摘要: 根据目前地面激光扫描数据获取速度快、数据量大、测量距离远、专用特殊材料制作的标靶识别距离近、点云定向数据处理相对滞后、自动化程度低、不能适应远距离地形测量的现状,提出了从大点云中(每站1亿点以上)自动探测远距离标靶的点云定向方法.该方法首先根据标靶控制点的工程测量坐标信息,搜索到标靶所在点云环,然后对各点云环进行扇形分区,快速探测标靶,获取标靶中心扫描坐标,最后平差计算扫描仪位置参数和姿态参数,实现点云坐标到工程测量坐标的转换.该方法在普通配置的计算机上得到实现,并成功用于远距离山区地形测量,其中定向标靶半径0.162m,标靶到扫描站距离在180~700m之间.

关键词: 大点云, 球形标靶, 扫描坐标, 工程测量坐标, 坐标转换, 地形测绘

Abstract: Terrestrial laser scanning (TLS) technology has high speed of data acquisition, large amount of point cloud, long distance of measuring. However, there are some disadvantages such as distance limitation in target detecting, hysteresis in point clouds processing, low automation and weaknesses of adapting long-distance topographic survey. In this case, we put forward a method on long-range targets detecting in big point clouds orientation. The method firstly searches point cloud rings that contain targets according to their engineering coordinate system. Then the detected rings are divided into sectors to detect targets in a very short time so as to obtain central coordinates of these targets. Finally, the position and orientation parameters of scanner are calculated and point clouds in scanner's own coordinate system(SOCS) are converted into engineering coordinate system. The method is able to be applied in ordinary computers for long distance topographic(the distance between scanner and targets ranges from 180 to 700 m) survey in mountainous areas with targets radius of 0.162m.

Key words: big point clouds, spherical targets, SOCS, engineering coordinate system, coordinate converting, topographic survey

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