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针对反潜直升机低空飞行模拟的实际需求,通过建立球面天空几何模型,利用CIE2003通用天空标准亮度分布模型,基于Preeham全气候特征参数值,进行亮度压缩、颜色空间转换、gamma校正和顶点颜色映射,实现不同经纬度地域、不同时间、不同天气状况下天空动态背景图像的实时仿真。仿真结果表明,该方法物理意义清晰,计算量小,产生的图像质量较高,是低空飞行模拟器生成户外天空场景的一种有效方法。
According to the actual demand of low-altitude flight simulation of anti-submarine helicopters, this paper uses the CIE2003 common sky standard brightness distribution model and the brightness compression, color space conversion, gamma correction and vertex color mapping based on Preeham global climatic parameters Real Time Simulation of Dynamic Background Image of Sky in Different Latitude and Longitude Regions, Different Time and Different Weather Conditions. The simulation results show that this method has a clear physical meaning, a small amount of calculation and a high image quality, which is an effective method for generating outdoor sky scenes in low-altitude flight simulators.