单线阵CCD相机定位精度评估模型及几何误差研究  

Study on positioning accuracy assessment model and geometric errors for single-linear-array CCD camera

作　　者：智喜洋[1] 张伟[1] 曹移明[1] 刘明川[1] 

机构地区：[1]哈尔滨工业大学空间光学工程研究中心,黑龙江哈尔滨150001

出　　处：《光学技术》2011年第6期669-674,共6页Optical Technique

摘　　要：为满足单线阵CCD相机立体测绘定位的需求,研究了相机几何误差对定位精度的影响,并建立了它们之间的数值模型,为相机的几何指标分析和量化提供理论支持。首先针对单线阵立体成像特点,分析了几何标定和像点量测误差对定位结果的影响;然后以前方空间交会公式为基础,推导出定位精度评估模型。该模型给出了定位精度随几何标定和像点量测误差的变化规律;最后以IKONOS卫星为应用算例,验证了模型的正确性。In order to meet the positioning requirements for stereo mapping of single-linear-array CCD camera（SLAC）,the influences of SLAC geometric errors on positioning accuracy are investigated.The positioning accuracy assessment model is established,which can offer theoretical foundation for analyzing and quantifying geometric specifications of camera.Firstly,the errors of the geometric calibration and image point measurement（GIME） impacting stereo positioning are analyzed according to the characteristics of stereo mapping of SLAC.Secondly,based on space forward intersection formula,the model for the relationship between them is deduced mathematically,and then the variations of the positioning accuracy with GIME are presented.Finally,the model is verified by taking IKONOS satellite data as an example.

关 键 词：光学测量 立体测绘 单线阵CCD相机 定位精度评估模型 几何误差 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]