数码相机畸变差模型中不同参数组合对物方坐标精度的影响  

Influences on coordinate precision caused by different parameters of distortion model of digital camera

作　　者：郭辉[1] 李天子[2] 徐克科[2] 

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001 [2]河南理工大学测绘与国土信息工程学院,河南焦作454000

出　　处：《工程勘察》2012年第9期62-64,68,共4页Geotechnical Investigation & Surveying

基　　金：安徽理工大学青年教师科学研究基金(QN200802)

摘　　要：数码摄影测量已成为摄影测量研究与应用的热点,数码相机是进行数码摄影测量的关键设备。本文介绍了数码相机的误差源,阐述了数码相机的畸变差模型及检校原理,利用室外检校场对哈苏H1D相机进行了高精度的检校,并着重讨论了畸变差模型中不同参数组合对物方坐标精度的影响,验证得出,径向畸变为数码相机畸变差中的主要误差,偏心畸变等其它畸变相对较小,但在数码航空摄影测量及高精度的近景摄影中要采用完整的畸变差模型来对原始数码影像进行几何纠正。The digital photogrammetry has become the focus of study and application in the field of photogrammetry, and digital camera is the key equipment. This paper introduces the error source, calibration and mathematical distortion model of digital camera. Based on outdoor calibration field, Hasselblad HID was calibrated with high precision, and influences on coordinate precision caused by all different parameter cases of distortion model are discussed in detail. The example shows that radial distortion is the main error, other distortions are small, but in aerial photogrammetry and close photogrammetry of high precision, the image should be rectified based on a completed distortion model.

关 键 词：相机检校 检校场 畸变差模型 精度分析 

分 类 号：P231.2[天文地球—摄影测量与遥感]