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一种更严密的双介质立体摄影测量折射改正算法
引用本文:曹斌,朱述龙,邱振戈,曹彬才. 一种更严密的双介质立体摄影测量折射改正算法[J]. 测绘学报, 2017, 46(9): 1182-1192. DOI: 10.11947/j.AGCS.2017.20170119
作者姓名:曹斌  朱述龙  邱振戈  曹彬才
作者单位:1. 上海海洋大学海洋科学学院, 上海 201306;2. 信息工程大学五院, 河南 郑州 450001
基金项目:上海市科学技术委员会科研计划,航空遥感技术国家测绘地理信息局重点实验室基金(2016B05)The Scientific Research Program of Science and Technology Commission of Shanghai Municipality of China,The Foundation of the Key Laboratory for Aerial Remote Sensing Technology of National Administration of Surveying
摘    要:提出一种更严密的双介质立体摄影测量物方坐标折射改正算法。该算法用水下目标的空中同名直线光线公垂线段的中点作为摄影测量交会点的理论位置,解决了空中同名直线光线延长线不相交情况下摄影测量交会点不存在导致的点位关系不确定性问题,使摄影测量交会点到真实物点的坐标折射改正公式能够严格推导出来。分析了空中同名直线光线不相交情况对物方大地坐标折射改正的不利影响,研究了摄影测量交会点与水下真实物点的相互位置关系,推导了水下目标点的水深和大地坐标计算公式(即折射改正公式),通过WorldView-2立体影像浅海海底地形测量试验对算法的正确性和测量精度进行验证。研究表明,不论水下目标的空中同名直线光线延长线是否相交,该算法都是适用的,且能显著改善水下目标的高程测量精度。

关 键 词:双介质立体摄影测量  折射改正  摄影测量交会点  真实物点  水下目标定位  
收稿时间:2017-03-13
修稿时间:2017-06-26

More Rigorous Correction of Refraction Effects in Two-media Stereophoto-gr ammetry
CAO Bin,ZHU Shulong,QIU Zhenge,CAO Bincai. More Rigorous Correction of Refraction Effects in Two-media Stereophoto-gr ammetry[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(9): 1182-1192. DOI: 10.11947/j.AGCS.2017.20170119
Authors:CAO Bin  ZHU Shulong  QIU Zhenge  CAO Bincai
Affiliation:1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;2. The Fifth College of the Information Engineering University, Zhengzhou 450001, China
Abstract:A more rigorous algorithm is presented for correction of refraction effects in two-media stereo photogrammetry .The mid-point of the shortest line segment joining two aeri al corresponding rays of a point on an underwater object is used as a photogrammetric intersection point which doesn't exist when the two rays are non-intersecting .As a result ,the uncertainty of the intersection point is removed ,the positional relationship between the intersection point and the true object point becomes definite ,and the refraction correction formula from the intersection point to the true object point can be strictly derived.The bad effect on the refraction correction is firstly analyzed ,which caused by that the two rays are non-intersecting .Then the positional relationship between the intersection point and the true object point is studied.Afterthat,the formulas regarding water depth and geodetic coordinates of points on an underwater object are deduced , that is often known as correction of refraction effects .Finally ,the algorithm is tested by two experiments using the data of WorldView-2 .The results show that the algorithmis suitable for any case in which whether or not the two aerial corresponding rays of an underwater object point are intersecting , and it can significantly improve the measurement accuracy of underwater object's elevation .
Keywords:two-media stereophotogrammetry  correction of refraction effects  photogrammetric intersection point  true object point  underwater object positioning
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