非量测数码相机三种检校方法的适用性评价  

Applicability Evaluation of Three Calibration Methods for Non-metric Digital Cameras

作　　者：谷晴晴 李浩[1] 丁影 宋美杰 胡龄心 GU Qingqing;LI Hao;DING Ying;SONG Meijie;HU Lingxin(School of Earth Science and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学地球科学与工程学院,南京211100

出　　处：《遥感信息》2020年第3期138-142,共5页Remote Sensing Information

基　　金：国家自然科学基金项目(41830110)。

摘　　要：相机检校是无人机测绘的关键技术之一,检校结果的好坏直接影响了最终测绘成果的质量。针对相机检校很难在方便实用性和精度上兼得的问题,对3种典型的相机检校方法展开研究,从检校计算稳定性、量测应用精度和检校控制场布设难易3个方面进行适用性评价。研究结果表明,光束法检校对控制场和拍摄条件较敏感;PTR方法与光束法的量测应用精度相当,且检校计算稳定性较高;而张正友标定方法与前二者相比量测应用精度略低,稳定性受像片数量和姿态的影响较大,但也可以满足中低精度的量测应用需求。Camera calibration is one of the key techniques for UAV mapping.The quality of the calibration results directly affects the quality of the final mapping results.In this paper,aiming at the problem that camera calibration is difficult to have both practicality and accuracy,three typical camera calibration methods are studied and evaluated from calibration stability,measurement application accuracy and the difficulty of the control field arrangements.The research result finds that the bundle calibration method is sensitive to the control field and shooting conditions;the PTR calibration method can achieve the same accuracy as the bundle calibration method,and the calibration stability is high;Zhang Zhengyou’s calibration method has a slightly lower accuracy,and the stability is greatly affected by the number and posture of images,but it can also meet the needs of low and medium measurement applications.

关 键 词：非量测数码相机 相机检校 适用性评价 光束法 PTR 张正友标定法 

分 类 号：P23[天文地球—摄影测量与遥感]