基于数字高程模型的复杂地表红外辐射特性模拟

Infrared Radiation Characterizations of Large-scale Complicated 3D Terrain Backgrounds

针对大规模地面背景红外仿真真实性差、对国外软件依赖性强的现状,提出了一种基于数字高程模型的通用的地表红外辐射特性模拟方法。首先,建立了任意倾斜表面的红外辐射求解方程;然后,提出了基于图像分割技术的三维地表红外辐射材质索引图像生成方法,并结合数字高程数据,给出了三维地表零视距红外辐射计算方法;最后,基于OpenGL实现了大规模三维地表的红外辐射特性模拟。实验结果表明,方法有效提高了地物背景的红外辐射特性模拟细节和真实性。

Background IR simulation for three-dimensional ground is very important for infrared simulation. A new method for complex three-dimensional simulation of the background infrared radiation was proposed based on digital elevation model. First, the infrared radiation characteristic equation of arbitrary inclined surface was established; Then the infrared radiation material index images were generated based on image segmentation technology, and the terrain surface temperature distribution was simulated according to the variation of terrain; Finally, three-dimensional infrared radiation characteristics of the complicated 3D terrain background was simulated with OpenGL. Experimental results show that this method effectively improves the detail and realism of the background infrared radiation characteristics.