地面红外纹理的动态生成技术研究

Research on Dynamical Generation Technique of Ground IR Texture

为实现红外导引头视景仿真中地面视景的动态生成,提出了一种地面红外纹理的动态生成方法。根据太阳小时辐射量、风速、大气温度、相对湿度和不同材质地面温度的实测数据建立样本集,并基于该样本集建立了几种典型地面材质表面温度场的工程计算模型。仿真工程中,在地面材质区域纹理的基础上,结合温度场工程计算模型和由多谱段图像法生成的纹理掩膜,在着色器中动态生成地面的红外纹理。实验表明,地面温度场模型的预测结果与实测数据吻合较好,生成的地面红外纹理比较逼真,满足三维仿真工程实时性要求。

In order to dynamically generate ground IR scene in simulation of IR seeker scene, a method for dynamically generating IR tex- ture of ground was provided. First, the sample set was built based on data of total solar radiation in one hour, wind speed, air temperature, relative humidity and ground temperature made by measurement, and the engineering calculation model was built for ground surfaces with different materials based on this sample set. In the simulation engineering, based on texture of different material area, and according to the temperature field calculation model and mask texture made by multi-spectral imaging method, the ground IR texture was dynamically generated by shader. According to experiments, the predicted results of the temperature field model agree well with real measured date, and the IR texture of ground with good fidelity meets the demands of instantaneity in 3D engineering simulation.