光学精密工程2018，Vol.26Issue(2)：435-441,7.DOI:10.3788/OPE.20182602.0435
检校场标定长焦航测相机参数
Calibration parameters of long focal aerial mapping camera by means of calibration field
摘要
Abstract
A two-step method was proposed to estimate parameters of long focal mapping camera by means of calibration field.The direct linear transform formulation(DLT)was used to obtain initial values for the hybrid LM QN iterative speed method by giving the feature points and the images taken from several positions and attitudes,and the whole process of calculating and experiment was de-scribed in detail.Compared with precise angle measurement method,operation and recording of accu-rate equipment are dispensable.It was only needed that images of calibration field with precise posi-tion information were taken from several different positions and orientations.The calibration results of experiment based on calibration field method indicate that the maximum re-projection error of fea-ture points is 2.471 pixel,the calibration accuracies of principal point and principal focal distancereach 9.7 μm(<2 pixel)and 4.3 μm(<1 pixel),respectively,the calculated position accuracy of the cam-era is 0.035 m,w hich meets precision requirements of mapping application.关键词
长焦航测相机标定/检校场/相机参数/混合LMQN算法Key words
focal aerial mapping camera calibration/calibration field/camera parameters/Hybrid LMQN method分类
信息技术与安全科学引用本文复制引用
王欢,周凌,张鑫,高思远,初诞旭,乔彦峰..检校场标定长焦航测相机参数[J].光学精密工程,2018,26(2):435-441,7.基金项目
国家自然科学基金资助项目(No.51305421) （No.51305421）
国防技术基础科研项目资助项目(No.JSZL2014130B005) （No.JSZL2014130B005）
吉林省科技发展项目青年基金资助项目(No.20140520137JH) （No.20140520137JH）
