两条控制线直接求解地理化参数的方法  

Method for directly solving georeferencing parameters by two control lines

作　　者：赵雪莹 姚吉利[1] 王建 杨承昆 赵猛 李彩林[1] ZHAO Xueying;YAO Jili;WANG Jian;YANG Chengkun;ZHAO Meng;LI Cailin(School of Architecture Engineering,Shandong University of Technology,Zibo,Shandong 255049,China)

机构地区：[1]山东理工大学建筑工程学院

出　　处：《测绘科学》2019年第11期137-142,共6页Science of Surveying and Mapping

基　　金：国家自然科学青年基金项目(41701525,41601496);山东省重点研发计划项目(2018GGX106002)

摘　　要：针对某些三维激光扫描测量中,由于地形限制,扫描视场内的起算数据不足以平差计算地理化参数,则需建立地理化参数直接求解模型的问题,该文提出一种基于两条控制线直接解算地理化参数的方法。该方法采用主方向法分3种形式精确表达控制线,有效克服了地理化中传统直线表达的冗余性和扰动性。实验结果表明,该方法获取的地理化参数可靠,可作为精地理化中获取地理化参数初值的途径,也能应用在无初值参考、只有少量控制基元的实际扫描测量中,有一定的实际应用价值。Aiming at the problem that there were little initial data in scanning field of view due to topographic restriction,and georeferencing parameters couldn’t be adjustment calculated with the little initial data in some 3D laser scanning measurement,so a direct solution of georeferencing parameters must be studied.In this paper,a method for directly solving the georeferencing parameters by two control lines was presented.Control lines were expressed accurately in three forms which were classified according to the main axis of direction vector,the redundancy and perturbation of traditional linear expression in georeferencing were effectively avoided.The results showed that the algorithm was reliable,it could be used as the way to obtain the initial value of georeferencing parameters in precise georeferencing,and also could be used in some actual 3D laser scanning measurement which didn’t have initial value or only had a little control primitives.So the method had certain applicable value.

关 键 词：点云地理参考化 控制线 自由度 主轴 直接解法 

分 类 号：P232[天文地球—摄影测量与遥感]