摘要
针对空间目标天基探测仿真系统需求,提出了一种基于卫星工具套件(STK)+MATLAB的深空背景点目标红外序列图像生成方法。点目标表面温度计算采用了比节点网络法更高效的等温简化模型以提高仿真效率;由比低分辨率光谱仪(LRS)模型更完备的中段空间实验卫星(MSX)红外星表提供深空背景模型,扩展了探测系统仿真应用领域;同时,建立了以电子数表征的目标背景照度和图像灰度转换模型。图像仿真过程中加入卫星扰动误差、相机测量误差和焦面电子学噪声,仿真生成的图像序列更接近真实物理过程。该仿真方法可以模拟任意时刻、任意指向和任意光学视场4～26μm的点目标红外图像序列,图像生成实时性好。文章最后给出了某空间目标的红外序列图像仿真实例。
In order to meet the demands of space-based detection simulation system, a method of infrared sequence image generation for point targets in deep space background is presented based on the Satellite Tool Kit（STK） and MATLAB. A simple isothermal model more efficient than the node network method is used to calculate the temperature of the space targets to improve the simulation efficiency, and a model of celestial background is presented based on Midcourse Space Experiment（MSX） infrared stellar catalog more complete than the Low Resolution Spectra（LRS） stellar catalog to extend the application of the space based detection simulation system. The conversion model between the irradiance of target background and the image gray is established by calculating the electron numbers received by the detectors. The disturbance error of satellite, measurement error of camera and electronic noise of Focal Plane Array（FPA） are considered to generate images closed to a real world. Experimental results show that the proposed method can simulate the infrared sequence images of point targets at anytime, any viewpoint and any Field of View（FOV） （wavebands range from 4 μm to 26 μm）. Finally, an infrared image sequence of some point targets are simulated.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第12期3062-3068,共7页
Optics and Precision Engineering
基金
国家863高技术研究发展计划资助项目(No.2006AA1280)
关键词
红外序列图像
图像生成
空间目标
深空背景
红外星表
infrared sequence image
image generation
space target
deep space background
infrared stellar catalog
