首页 | 本学科首页   官方微博 | 高级检索  
     检索      

基于天文观测的相机标定及姿态测量技术研究
引用本文:戴东凯,王省书,胡春生,焦宏伟.基于天文观测的相机标定及姿态测量技术研究[J].光学学报,2012,32(3):312005-112.
作者姓名:戴东凯  王省书  胡春生  焦宏伟
作者单位:戴东凯:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
王省书:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
胡春生:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
焦宏伟:国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
基金项目:高等学校博士学科点专项基金(20104307110021)资助课题。
摘    要:为利用相机进行天文观测以实现高精度的相机姿态测量,必须先对相机参数进行精确标定。针对传统相机标定方法工作距离有限的问题,提出了以恒星为控制点的相机标定方法,根据球面天文学方法计算观测时刻控制点的世界坐标,利用摄像测量原理建立了恒星观测模型,求解相机的内外参数并分析了误差因素。实验结果表明,该标定方法在不依赖于精密、复杂的外部设备情况下可达到较高精度,并具有较强的抗噪声能力。将标定结果用于天文观测并求解相机姿态,航向角和俯仰角的解算重复性优于10″,能够满足高精度姿态测量的需求。该方法可进一步推广应用于星敏感器的标定。

关 键 词:测量  相机标定  姿态测量  恒星  天文观测
收稿时间:2011/7/8

Camera Calibration and Attitude Measurement Technology Based on Astronomical Observation
Dai Dongkai Wang Xingshu Hu Chunsheng Jiao Hongwei.Camera Calibration and Attitude Measurement Technology Based on Astronomical Observation[J].Acta Optica Sinica,2012,32(3):312005-112.
Authors:Dai Dongkai Wang Xingshu Hu Chunsheng Jiao Hongwei
Institution:Dai Dongkai Wang Xingshu Hu Chunsheng Jiao Hongwei (College of Opto-Electronic Science and Engineering,National University of Defense Technology,Changsha,Hunan 410073,China)
Abstract:To realize high precision attitude measurement by means of astronomical observation with a camera, it is quite necessary to calibrate the parameters of the camera accurately. A camera calibration method is presented based on astronomical observation to solve the problem that the traditional calibration methods can only work effectively in a limited distance. The world coordinates of control points at the measuring time are calculated by using the spherical astronomy method. A star observation model is established according to the photogrammetric principle, both the external and intrinsic parameters of the camera are obtained, and the calibration precision is also analyzed. The experimental results indicate that the calibration method can achieve a good precision without the aid of precise and complex equipment, and the method performs also well when noise exists. Finally, the calibration result is adopted to work out the attitude of the camera, and the obtained repeatability accuracy of yaw and pitch angle is better than 10″. This method can be applied to the calibration of star sensor.
Keywords:measurement  camera calibration  attitude measurement  star  astronomical observation
本文献已被 CNKI 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号