基于WTLS的倾斜摄影模型坐标变换方法  

Coordinate Transformation Method of Oblique Photogrammetry Model Based on WTLS

作　　者：钱荣荣 张畅 龙容 余航 QIAN Rongrong;ZHANG Chang;LONG Rong;YU Hang(Zhejiang Academy of Surveying and Mapping Science and Technology,Hangzhou 310012,China;Suzhou University of Science and Technology,Suzhou 215000,China)

机构地区：[1]浙江省测绘科学技术研究院,浙江杭州310012 [2]苏州科技大学,江苏苏州215000

出　　处：《地理空间信息》2023年第2期6-10,共5页Geospatial Information

基　　金：浙江省科协2021年软科学研究课题。

摘　　要：倾斜摄影测量技术作为新兴技术在城市规划方面有广泛的应用前景,但倾斜测量数据模型坐标系与地方规划坐标系存在不统一问题。为了进行坐标转换工作,提出利用OSG对倾斜测量数据进行结构解析,针对转换参数计算中控制点原始坐标和目标坐标均存在误差的问题,引入加权总体最小二乘进行参数求解的方法。应用模拟数据验证加权总体最小二乘方法算法效果,相较于最小二乘法有一定的提高。最后应用于实测倾斜摄影测量数据,转换后三维模型与二维数据套合情况良好、模型完整性效果良好。结果表明该方法能够有效的解决倾斜摄影测量数据坐标转换过程中的问题。Oblique photogrammetry technology as a new technology has broad application prospects in town planning, but its coordinate system is not the same with the local coordinate system. For coordinate transformation, we used OSG to analyze the structure of data, and presented a weighted total least squares(WTLS) method for solving the error of coefficient matrix. The example of simulation calculations showed that the parameter using WTLS was more reasonable than using least squares method. Finally, we applied this method to measure oblique photogrammetry data. The results show that 3D model after coordinate conversion fits well with the 2D data and has good integrity, this method can effectively solve coordinate transformation problem in oblique photogrammetry technology.

关 键 词：倾斜摄影测量 OpenSceneGraph 坐标转换 加权总体最小二乘 

分 类 号：P231[天文地球—摄影测量与遥感]