一种适于海浪测量的立体摄影物理模型

发布时间：2018-03-30 16:15

  本文选题：立体摄影　切入点：海狼　出处：《物理学报》2017年05期

【摘要】：由于在海面上布设控制点较为困难,本文发展了一种无需海面控制点的立体摄影物理模型.该模型依次通过相机固有参数标定、相对定向和基于平均海面的绝对定向三个环节实现,文中给出了各个环节的控制方程和具体算法.利用室内实验时拍摄的一个影像对,将共面方程和距离方程联立构成闭合方程组,实现相机固有参数的标定;利用外海测量时拍摄的一个影像对,采用共面方程实现相对定向参数的标定;利用外海测量时拍摄的一个影像对序列,在左相机坐标系中通过影像匹配确定平均海面,建立特定的物方坐标系,并实现绝对定向.室内实验检验了固有参数控制方程的收敛性并表明定标精度较高;外海实验成功地构建了海面高度场,这表明本文提出的相对定向和绝对定向方法是可行的.该模型只需将两个相机按一定方位架设在平台上即可进行海浪测量,免去了繁琐的海面控制点布设过程,降低了工作难度和成本,有利于立体摄影海浪测量技术的推广和应用.
[Abstract]:Because it is difficult to lay control points on the sea surface, this paper develops a stereo photographic physical model without the sea surface control points. The model is calibrated by the inherent parameters of the camera in turn. Relative orientation and absolute orientation based on average sea surface are realized. The control equations and specific algorithms of each link are given in this paper. The coplanar equation and the distance equation are combined to form the closed equations to calibrate the intrinsic parameters of the camera, and to calibrate the relative directional parameters by using a pair of images taken in the offshore measurement, and the coplanar equation is used to calibrate the relative directional parameters. Using an image pair sequence taken in offshore measurement, the mean sea surface is determined by image matching in the left camera coordinate system, and a specific object square coordinate system is established. The convergence of the inherent parameter control equation is verified and the calibration accuracy is high. The sea surface height field is successfully constructed by the offshore experiment. This shows that the relative and absolute orientation methods proposed in this paper are feasible. In this model, only two cameras can be set up on the platform according to a certain position to carry out the wave survey, thus eliminating the cumbersome process of setting up the control points of the sea surface. It reduces the working difficulty and cost, and is beneficial to the popularization and application of stereo photogrammetric wave measurement technology.
【作者单位】： 中国海洋大学海洋与大气学院;国家海洋局第一海洋研究所海洋环境与数值模拟研究室海洋环境科学与数值模拟国家海洋局重点实验室;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室;
【基金】：国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目(批准号:U1406404) 国家自然科学基金青年基金(批准号:41506041) 国家海洋局第一海洋研究所基本科研业务费专项基金(批准号:GY02-2012T01)资助的课题~~
【分类号】：TB863
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本文编号：1686656