空间相机交错拼接线列探测器重叠像元数计算  

Calculation of Overlapping Pixels of Staggered Linear Array Detectors for Space Camera

作　　者：王运[1,2] 孙胜利[1,2] 林长青[1,2] 

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]中国科学院红外探测与成像技术重点实验室,上海200083

出　　处：《光学学报》2014年第1期252-258,共7页Acta Optica Sinica

基　　金：武器装备预研基金(9140A21041210ZK0702)

摘　　要：大视场相机焦平面通常由多个线列探测器交错拼接而成。为保证相机在对地成像中不出现漏缝,提出一种相邻探测器重叠像元数计算方法。通过坐标变换法建立空间相机对地成像模型,分析了漏缝产生的原因。分析了像点在前后两行探测器上沿线列方向的相对位移情况,并利用蒙特卡罗法分析轨道、姿态扰动以及目标高程等因素对像点相对位移计算结果的影响,像点位移计算结果的最小值即为相邻探测器最小重叠像元数,依此给出了相邻探测器的重叠像元数计算模型。将该方法应用于某红外相机焦平面的设计,根据该方法确定了各相邻探测器的重叠像元数,并通过红外遥感图像的匹配实验验证了该方法的正确性。The focal plane of wide-field space camera is always comprised of several staggered linear array detectors. In order to ensure the coverage area of the camera without gap, a calculation method of overlapping pixels for staggered linear array detectors is proposed. The earth imaging model of the camera is established by utilizing coordinate transformation, and the reason that leads to gaps is discussed. The relative image motion between the leading and trailing rows of detectors along the direction of the linear array is calculated, and the influences on relative image motion introduced by orbital displacement, attitude disturbance and terrain elevation are analyzed based on Monto-Carlo method. The minimum value of the relative image motion is the minimum overlapping pixels of the adjacent detectors, so the calculation model of overlapping pixels of the adjacent detectors is given. The method is used in the design of the focal plane of an infrared camera, and the overlapping pixels of the adjacent detectors are determined. The method is validated by the matching test results of the infrared remote sensing images.

关 键 词：遥感 重叠像元 对地成像模型 线列探测器 交错拼接 

分 类 号：TP705[自动化与计算机技术—检测技术与自动化装置] V447.1[自动化与计算机技术—控制科学与工程]