测绘学报

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基于近景摄影测量的海上打桩定位方法研究

谢义林,姚连璧   

  1. 同济大学
  • 收稿日期:2009-04-21 修回日期:2009-08-06 出版日期:2011-12-28 发布日期:2019-01-01
  • 通讯作者: 谢义林

Approach of Marine Piling Positioning Based on Close-range Photogrammetry

  1. Tongji University
  • Received:2009-04-21 Revised:2009-08-06 Online:2011-12-28 Published:2019-01-01

摘要: 介绍了利用一个经过标定的CCD像机和一个测距仪,根据近景摄影测量理论进行海上打桩时的桩位定位模型。先利用Robert边缘检测算子和Hough变换,实时处理CCD像机采集的图像,提取桩边缘直线,利用CCD像机的内外方位元素,测距仪坐标及其量测值,再根据不同的打桩类型(仰桩,俯桩和直桩),建立求解桩中心坐标的数学模型,最后利用桩中心初值和牛顿下山法实时解算并获取设计高程面内的桩中心工程坐标,通过现场测试以及观测数据的计算,验证了此方法的正确性。

Abstract: In accordance with the theory of close-range photogrammetry, marine piling position method is introduced with the use of a calibration of the non-metric CCD camera and a rangefinder. Using Robert edge detector and Hough transform, real-time processing CCD camera collected images to get the straight line of piling edge; using the intrinsic and extrinsic parameters of CCD cameras, the rangefinder coordinates and its measured value, a mathematical models to solve pile center coordinates is set up according with different piling type (up, down, straight). By the initial value of pile center and Newton downhill method, pile center coordinates in CCD elevation level is obtained, as real-time access to engineering coordinates of pile center in design level. Data through the field test verifies the correctness of this method.