基于温差扰动补偿的红外纹理生成新方法

针对传统红外视景仿真中红外纹理生成效果生硬,真实感欠缺的问题,提出了一种基于温差扰动补偿的红外纹理生成新方法。该方法以实测红外图像为数据源,模拟红外成像机理构建红外成像链路模型,解耦环境影响因素得到红外图像各像素点对应的温度值,通过建立的目标表面热平衡方程和一阶导热方程求解实测与仿真时刻表面温度均值,利用各点温度与实测时刻均值温度的差值求得表面温差扰动,最后对仿真时刻均值温度进行温差补偿,得到表面的预测温度分布,并将计算出的辐亮度数据存储为DDS(Direct Draw Surface)纹理格式,以提高纹理生成的实时性。实验结果表明,该方法充分考虑到真实红外数据源的可靠性,同时兼顾红外纹理生成效率,在红外视景仿真中具有较好的工程实用价值。

New method of infrared texture generation based on temperature difference disturbance compensation

Aiming at the problems of stiff texture generation and realistic deficient in traditional infrared scene simulation,a new infrared texture generation method based on temperature difference disturbance compensation was presented. Taking measured infrared images as data source,the model of infrared imaging link was built through simulating infrared imaging. Environmental impact factors were decoupled to obtain the corresponding temperature of every pixel in infrared image,then objective surface thermal balance equation and one-dimensional heat conduct equation were established to solve the surface mean temperature in measurement time and simulation time,and then surface temperature difference disturbance was obtained through the difference between each point temperature and mean temperature in measurement time. Finally,surface predicted temperature distribution was gotten by temperature difference compensation for mean temperature in simulation time,and the calculated radiance data were saved as DDS textural format to improve the real-time of texture generation. The experimental results indicate that the method takes into account the reliability of real infrared data source adequately and the efficiency of infrared texture generation,and has good practical engineering value in infrared scene simulation.