提出一种机载成像系统目标被动定位算法, 应用机载成像设备, 实现对图像中目标的精确定位。首先, 根据镜头设计参数, 计算得到理想小孔成像模型下图像中目标点坐标信息, 并根据图像视场和分辨率, 计算得到目标在成像系统坐标系下空间信息; 其次, 根据成像系统安装位置信息和载机姿态信息, 计算得到目标在惯导坐标系下空间位置信息; 最后, 根据载机经纬度和高度信息, 计算得到目标实际位置信息。通过对采集到的实验数据进行分析, 结果表明, 文中方法具有较高的定位精度和处理效率。

A passive target localization algorithm based on airborne imaging system is proposed. The precise calculation of target location can be achieved by using airborne imaging devices. Firstly, according to the lens design parameters, the target coordinate information in the image can be mapped to the location under ideal camera model. The target space coordinate information in the camera coordinate system can be calculated by using the image view and image resolution. Secondly, the target space location information in the inertia navigation coordinate system can be calculated by using the imaging system installation location and airborne posture information. Finally, according to the latitude, the longitude and the altitude of the airborne location, the target actual location can be calculated. The experimental results demonstrate that our proposed algorithm can achieve accurate target localization in less time.