双向反射分布函数模型的对比分析研究  

Comparison, Analysis and Research on Models of Bidirectional Reflectance Distribution Function

作　　者：刘燕[1] 张健[1] 吕瑛[1] LIU Yan;ZHANG Jian;LYU Ying(College of Information Engineering,Northwestern Polytechnical University Ming De College,Xi'an 710124,China)

机构地区：[1]西北工业大学明德学院信息工程学院

出　　处：《微处理机》2019年第4期38-41,共4页Microprocessors

摘　　要：在双向反射分布函数基本概念的基础上对比分析了三种常用模型:各项异性Phong模型、T-S模型和Davis模型。通过使用MATLAB仿真,指出各模型的优缺点及适用领域,为建立光度曲线选择模型提供依据。将各向异性Phong模型解析为镜面反射和漫反射两类分量,并将反射率分解成漫反射率和镜面反射率两部分,以应用于较高精度的视星等计算。由T-S模型中的粗糙度参数可以快速鉴别出材料的镜面反射和漫反射分量,模型简练,适用于快速计算目标视星等以及建立偏振双向反射分布函数模型。探查Davis模型中所含有的波长参数,可用以分析目标的光谱特性。On the basis of the basic concept of BRDF,three commonly used models are compared and analyzed:anisotropic Phong model,T-S model and Davis model.By using MATLAB simulation,the advantages and disadvantages of each model and its applicable fields are pointed out,which provides the basis for establishing photometric curve selection models.The anisotropic Phong model is analyzed into specular reflection and diffuse reflection components,and the reflectance is decomposed into diffuse reflection and specular reflection,which can be applied to the calculation of apparent magnitude with higher accuracy.The specular and diffuse reflectance components of the material can be quickly identified by roughness parameters in the T-S model.The model is concise and suitable for fast calculation of target apparent magnitude and establishment of pBRDF model.Detecting the wavelength parameters contained in Davis model can be used to analyze the spectral characteristics of the target.

关 键 词：双向反射分布函数 镜面反射 漫反射 视星等 偏振双向反射分布函数 

分 类 号：O432.1[机械工程—光学工程] TP391.9[理学—光学]