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为模拟生成地球红外辐射背景图像,研究其成像方法。首先将地球表面划分为若干地表区域,考虑大气传输特性、地表类型、地表经纬度及地表海拔高度等因素影响,根据地表类型,建立地球表面区域温度模型和红外辐射亮度模型,然后运用数值计算方法得到地球表面温度和红外辐射亮度分布。根据红外探测器视角与视点,利用OpenGL实现了红外探测器在太空中对地球背景红外辐射亮度的三维图像显示。结果表明,模拟生成的地球红外背景图像效果逼真,可用于红外目标识别和仿真应用。
In order to simulate the generation of Earth’s infrared radiation background images, the imaging method was studied. Firstly, the Earth’s surface is divided into several surface areas. Based on the characteristics of atmospheric transmission, surface type, surface latitude and longitude, and surface altitude, the Earth’s surface temperature model and the infrared radiation brightness model are established according to the surface types. Then, Earth surface temperature and infrared radiation brightness distribution. According to the perspective and viewpoint of the infrared detector, a three-dimensional image display of the infrared radiation brightness of the earth background by the infrared detector in space is realized by using OpenGL. The results show that the simulation of the Earth’s infrared background image realistic effect, can be used for infrared target recognition and simulation applications.