基于光线跟踪和BRDF模型的红外高光反射仿真

仿真红外高光反射现象是实现红外场景真实感的必要内容。本文从红外辐射传输过程出发,提出一种基于光线跟踪和双向反射分布函数(Bidirectional Reflection Distribution Function,BRDF)模型的红外高光反射仿真方法,该方法利用光线跟踪模型确定红外高光反射现象中起主要贡献的光线,减少计算量；同时,为了解决传统方法仅应用反射率进行仿真带来的真实感不强的问题,引入BRDF计算红外辐射反射分量,提高红外高光现象仿真的真实感。实验结果表明,本文方法通过将光线跟踪模型与双向反射分布函数相结合实现了红外仿真中真实感和计算量的统一,为红外高光反射现象仿真提供了新思路。

Simulation of infrared specular reflection based on ray tracing and BRDF model

The simulation of infrared specular reflection is a necessary work to realize the realistic infrared scene.An infrared specular reflection simulation method based on ray tracing and bidirectional reflectance distribution function(BRDF) model was proposed.The method used ray tracing model to determine the main contribution ray in highlight reflection phenomenon,which will reduce the amount of calculation;At the same time,traditional method only uses reflectivity to carry out the simulation,which makes infrared scene lack the realistic.To solve the problem,BRDF was introduced to compute the infrared radiation reflection component,which will enhance the realistic simulation of infrared light phenomenon.The experimental results show that combined ray tracing model with BRDF achieves the unity of realistic and the reducing of calculation,and it provides a new idea for the simulation of infrared specular phenomenon.