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为仿真场景景物红外特征和红外高光现象,根据红外成像基本原理改进了计算机图形学中的可见光光照模型,提出了基于Blinn-Phong模型的红外辐照模型,在可见光Blinn-Phong反射模型中引入自发辐射项并考虑场景中各种辐射源与对象表面间辐射能量的传递,使对象表面辐照效果符合相应规律。在仿真实现方面,提出基于几何特征的反射区域辐射能量计算方法,根据景物几何特征确定反射区域,由入射点处的自发辐射和材料在长波波段的漫反射率、镜面反射率以及反射点处的法向量、探测器位置、朝向等信息计算反射点相对探测器的总辐射能量,实现红外高光效果模拟。分析验证了所提出的红外辐照模型和高光效果模拟方法的有效性。
In order to simulate the scene infrared features and infrared highlight phenomenon, this paper improves the visible light illumination model in computer graphics based on the basic principle of infrared imaging and proposes an infrared radiation model based on Blinn-Phong model. In Blinn-Phong reflection model, Radiation items and consider the scene in a variety of radiation sources and the surface of the radiation energy transfer between the object surface irradiation effect in line with the corresponding laws. In the aspect of simulation, this paper proposes a method to calculate the radiant energy of the reflection region based on the geometric features. The reflection region is determined according to the geometric features of the scene. The spontaneous emission at the incident point and the diffuse reflectance, specular reflectance and reflectance of the material in the long- Normal vector, detector position, orientation and other information to calculate the total reflection energy of the detector relative to the detector to achieve infrared highlight effect simulation. The validity of the proposed infrared radiation model and the simulation method of highlight effect is verified.