基于遥感反演的空间下视系统红外场景仿真

Infrared scene simulation of space down-looking system based on remote sensing inversion

空间红外下视系统的真实感红外场景仿真一直以来都是研究的一个难点。提出了一种基于卫星红外遥感反演数据的空间下视红外场景仿真方法。利用红外遥感反演数据,通过匹配算法获得仿真波段内地表红外纹理,建立了下视红外观测模型,对地表红外纹理图像在传感器焦平面上重采样,最后按照辐射传输理论,计算生成光学入瞳前红外场景。仿真结果表明:该方法可以逼真地模拟地物场景红外纹理特征。将热红外遥感反演技术应用于红外场景仿真,极大简化了大规模地表场景仿真过程,为空间下视系统红外场景仿真提供了一种直观、有效的新方法。

The simulation of realistic infrared scene in space infrared down-looking system has always been a difficult problem in the research. A new kind of infrared scene simulation method of space downlooking system based on remote sensing inversion was presented in this paper. Firstly, infrared texture of the terrain was extracted from the data of infrared remote sensing inversion by using matching algorithm.Secondly, an infrared detecting model of down-looking system was proposed, which simulated resampling of infrared texture on FPA. Finally, by using radiation and transmission theory, scene radiance image in front of the entrance pupil was calculated. The simulation results show that the proposed method can realistically simulate infrared texture feature of earth surface. In this paper, thermal infrared remote sensing technology is applied to infrared scene simulation, which greatly simplifies the simulation process of large scale terrain scene, and provides an intuitive and effective new method for infrared scene simulation of space down-looking system.