测绘学报 ›› 2015, Vol. 44 ›› Issue (9): 988-994.doi: 10.11947/j.AGCS.2015.20140473

• 摄影测量学与遥感 • 上一篇    下一篇

以重心坐标为基准的空间后方交会非迭代法

李加元, 胡庆武, 艾明耀   

  1. 武汉大学遥感信息工程学院, 湖北 武汉 430079
  • 收稿日期:2014-09-09 修回日期:2015-01-06 出版日期:2015-09-24 发布日期:2015-09-24
  • 作者简介:李加元(1989—),男,硕士,研究方向为摄影测量、图像处理与计算机视觉。E-mail:397744657@qq.com
  • 基金资助:
    国家自然科学基金(41271452)

A Non-iterative Space Resection Method Based on Barycentric Coordinates

LI Jiayuan, HU Qingwu, AI Mingyao   

  1. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China
  • Received:2014-09-09 Revised:2015-01-06 Online:2015-09-24 Published:2015-09-24
  • Contact: 胡庆武,huqw@whu.Edu.cn E-mail:huqw@whu.Edu.cn
  • Supported by:
    The National Natural Science Foundation of China (No.41271452)

摘要: 为解决基于迭代的空间后方交会算法在倾斜摄影中可能出现的不收敛现象,提出了一种以重心坐标为基准的非迭代解算方法。首先将控制点物方空间坐标描述成重心坐标,并基于其坐标参考无关性,采用总体最小二乘方法求出对应像方空间坐标,然后通过正交矩阵方法进行绝对定向并优化。试验结果表明,该方法几乎对任意影像姿态均能正确解算,并且精度达到甚至优于基于迭代的空间后方交会方法。

关键词: 空间后方交会, 重心坐标, 总体最小二乘, 绝对定向, 倾斜摄影

Abstract: To resolve the problem that iterative space resection algorithms may have no convergence in oblique photogrammetry,a novel non-iterative method based on barycentric coordinates is proposed. This algorithm firstly describes the object space coordinates of control points as barycentric coordinates,based on its coordinate reference independence,the corresponding image space coordinates can be obtained by using total least square method,then absolute orientation using orthonormal matrices is applied and the result is optimized finally. Experimental results show that this algorithm can be suitable for any image attitude angle,and the accuracy is even better than iterative space resection methods.

Key words: space resection, barycentric coordinates, total least square, absolute orientation, oblique photogrammetry

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