60°二维指向镜的面阵相机几何模型标定方法
投稿时间:2019-08-30  修订日期:2019-11-11  点此下载全文
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作者单位E-mail
陆强 中国科学院上海技术物理研究所 luqiangac@126.com 
中文摘要:三轴稳定静止轨道面阵相机需要对一定视场内的目标进行搜索和跟踪,常采用二维指向镜与面阵探测器结合的“凝视”成像的技术方案。但是具有二维指向镜的面阵相机像面存在畸变和像旋等问题,影响目标跟踪定位精度。对60°二维指向镜的面阵相机进行了畸变校正和像旋校正,提出基于内外方位元素结合的几何模型实验室标定方法。通过对指向镜法线、南北轴、东西轴共计13个误差项的进行解算优化,平均误差为0.74像元,满足实际使用需求。
中文关键词:几何模型,畸变校正,像旋校正,内外方位元素
 
Geometric Calibration Method of Planar Array Camera with 60 Degree Two-Dimensional Pointing Mirror
Abstract:Three-axis stabilized geostationary orbit plane array camera needs to search and track the target in a certain field of view, and usually adopts the "staring" imaging technology scheme combining two-dimensional directional mirror and array detector. However, there are some problems such as image distortion and image rotation, which affect the accuracy of target tracking and positioning. The distortion correction and image rotation correction of 60 degree two-dimensional directional mirror array camera are carried out, and a geometric model laboratory calibration method based on the combination of internal and external azimuth elements is proposed. The average error is 0.74 pixels, which satisfies the requirement of practical use, by calculating and optimizing 13 error items of the normal, north-south axis and east-west axis of the pointing mirror.
keywords:geometric model, distortion correction , image rotation correction, internal and external azimuth elements
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