45°指向镜成像畸变特性分析和校正  

Analysis and correction of the image aberration of 45° directional mirror

作　　者：陈强[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,江苏南京210094

出　　处：《红外与激光工程》2010年第2期301-305,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60805003)

摘　　要：为扩大观测范围,航天遥感仪器通常采用45°指向镜扫描。在采用多元探测器的遥感仪器中,焦平面上所成的像不允许产生像旋,否则会使各个像元所对应的视场无法配准。因此,研究相应的像消旋方法,消除45°指向镜成像系统带来的像旋转,使其能够更好地应用于生产实践,是一个十分迫切的问题。对45°指向镜生成的图像的畸变特性进行了分析,同时根据每个像元坐标与地面坐标的对应关系,给出了校正图像畸变的方法。合成图像和真实图像的模拟实验结果表明:提出的畸变校正方法能够很好地校正45°指向镜的成像图像,在工程应用中具有重要的实用意义。In order to enlarge the observation range,the 45° directional mirror is often adopted in the remote sensing instruments.Images of focal plane array obtained with multiple element detectors of the remote sensing instruments are not allowed to have the image rotation,otherwise,the corresponding field of view of each image element can not be matched.Therefore,it is very important to research the correction of the image rotation of the 45° directional mirror,which can make the system of the 45° directional mirror more useful.The aberration properties on the image of the 45° directional mirror were analyzed,and an aberration correction method based on the corresponding relation between each aberration image pixel and the ground image was given.Simulation experimental results on synthetic and real images indicate that the aberration correction method is effective for the image of the 45° directional mirror.It is practical meaningful in engineering application.

关 键 词：45°指向镜 图像畸变 畸变校正 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]