高轨红外扫描相机视轴指向实时校正算法  

Real-Time Line of Sight Calibration Algorithm for High Earth Orbit Infrared Scanning Sensor

作　　者：薛永宏[1] 安玮[1] 张涛[2] 张寅生[2] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《光学学报》2013年第6期313-318,共6页Acta Optica Sinica

摘　　要：视轴指向校正是红外监视系统目标高精度跟踪定位的重要前提,而扫描相机视轴指向校正又是其中的难点。在分析扫描相机成像模型及其特点的基础上,提出基于失配角估计的视轴指向校正原理模型。通过建立失配角状态转移模型和视轴指向观测模型,并采用无迹卡尔曼滤波器(UKF),实现了对失配角参数的实时估计和视轴指向的实时校正。仿真结果表明,所提算法对相机视轴指向的校正精度高、性能稳定,可有效提高红外监视系统目标跟踪处理的实时性能和精度。Line of sight （LOS） calibration is the key precondition of accurate location and tracking of targets in infrared surveillance systems and the LOS calibration of scanning sensor is one of the difficulties. Based on the analysis of the imaging model and characteristics of scanning sensor, a theoretical calibration model based on the estimation of mismatching angles is proposed. By establishing the process model of the mismatching angles and the observation model of sensor LOS, and using an unscented Kalman filter （UKF）, the real time estimation of mismatching angles and calibration of sensor LOS are finally achieved. Simulation results show that the proposed algorithm has a high precision and smooth performance for sensor LOS calibration, and can effectively improve the timeliness and precision of target tracking process in infrared surveillance system.

关 键 词：遥感 视轴指向校正 失配角估计 红外监视系统 跟踪定位 

分 类 号：TP732.2[自动化与计算机技术—检测技术与自动化装置]