The directional emissivity is deduced from the Bidirectional Reflectance Distribution Function (BRDF) in the hemispherical scattering space of the objects.
利用双向反射分布函数测量系统，通过对物体表面双向反射分布的测量来获得其方向发射率。
The concept and measuring method of BRDF (Bi-directional Reflectance Distribution Function) are discussed in the paper.
本文介绍了双向反射分布函数(BRDF)的概念和测量方法。
In order to get an ideal lane marks' edge, an image preprocessing method based on edge distribution function (EDF) was proposed considering the directional characteristics of lane marks.
为了得到较理想的车道标识线的边缘，考虑车道标识线的方向特性，提出一种基于边缘分布函数(EDF)的图像预处理方法。
The concept and the measuring theory of BRDF (bi-directional reflectance distribution function ) were discussed .
介绍了双向反射分布函数（BRDF）的概念及其测量原理。
When using a single reference to measure the bi-directional scattering distribution function (BSDF), the incident zenith angle of the tested sample must be identical to that of the reference.
采用单一参考测量双向散射分布函数时，要求被测试样与参考标准的入射天顶角必须相同。
When using a single reference to measure the bi-directional scattering distribution function (BSDF), the incident zenith angle of the tested sample must be identical to that of the reference.
采用单一参考测量双向散射分布函数时，要求被测试样与参考标准的入射天顶角必须相同。
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