零视距地物长波红外特征场景仿真研究

为仿真地物长波红外场景图像,根据地表温度随时间变化的规律,并结合气象状况、背景材质、热特性参量、热状态等参数,在对太阳辐射、大气长波辐射、大气温度和地表热传导等影响地表温度变化的因素进行分析的基础上,建立了基于热平衡理论和热传导过程的方程。解算出多种常见地表一日之中的温度变化情况,并将其应用于由相同景物可见光纹理图像反演出的相应红外纹理图像中。在考虑景物表面自身发射、反射的辐射计算模型的前提下,生成了具有相似红外纹理细节的地表红外场景。结果表明,该方法可生成接近真实感的红外场景,有效地模拟仿真地物的长波红外特征。

Long Wave Infrared Scene Simulation Research Based on Zero Stadia of Landmark

In order to simulate landmark long wave infrared scene image, according to the variation law of earth surface temperature with time, combining the parameters, such as weather condition, background material, thermal feature parameters, thermal situation and so on, the factors which affect the variation process of earth surface temperature, such as sun radiation, sky long wave radiation, air temperature, earth surface heat conduction, are analyzed. The equation based on the thermal balance theory and heat conduction process is founded, then the temperature variation about some usual earth surfaces in a day is figured out, and the temperature is proposed to be simultaneously used in the corresponding infrared texture image derived from the same visual texture image. By considering the computation model including self radiation, reflected radiation of the scenery, the related earth surface infrared scene with infrared texture detail is created. The results indicate that the method can simulate infrared scene with reality and is valid to simulate landmark long wave infrared feature.