60°二维指向镜的面阵相机几何模型标定方法

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、东西轴的共计13个误差项进行解算优化,平均误差为0.74像元,满足实际使用需求。

Geometric calibration method of plane array camera with 60 degrees two-dimensional pointing mirror

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 degrees two-dimensional directional mirror array camera is carried out, and a geometric model laboratory calibration method based on the combination of internal and external azimuth elements is proposed. The average error are 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.