| 1. | Curve shape - is used to define the falloff of the brdf curve
曲线弧度通常被用作定义brdf的效应消散范围。 |
| 2. | Sampling data for brdf is analyzed with spherical harmonics , and then the brdf surface could be rendered fast under environment illumination
物体表面双向反射分布函数的采样数据利用球面调和函数系进行分析，然后可以在环境光源下作快速绘制。 |
| 3. | Using genetic algorithm , established brdf models of the silicon carbide paper and granite material and optimized parameters retrieval models
采用遗传算法建立了金刚砂和大理石材料的双向反射分布函数的参数模型，对模型进行参数反演时，通过遗传算法进行优化。 |
| 4. | The empirical formula of brdf changes with different incident angles is fitted according to the experiment data . in chapter four , the solar ultraviolet spectrum monitor was calibrated
第四章在对标准光源和漫反射板的研究基础上，建立了定标装置，对太阳紫外光谱监视器进行了地面辐射定标。 |
| 5. | Brdf of material surface has relations with wavelength , incidence angle and scattering angle . it can barely be expressed by analytical formula , and can only be obtained through experiments
材料表面的brdf ，与波段、入射及出射角都有关系，几乎不可能用解析表达式表示，只能通过实验手段测试获得。 |
| 6. | For rendering of real - world surface material and 3d texture surface , the bi - directional reflection distribution function ( brdf ) and bi - directional texture function ( btf ) are described
在复杂材质和3d纹理技术方面，本文主要阐述了对应的两个描述函数，双向反射分布函数和双向纹理函数的相应处理方法。 |
| 7. | By measuring the brdf of a kind of typical material - granite , sample ' s hemisphere reflectivity has been acquired and the law of its dependence on the zenith - angle and azimuth - angle variation has been studied
摘要对以大理石为代表的材料进行了双向反射分布函数测量实验，得出了样品的半球反射率，并研究了其随入射、反射天顶角等参数变化的规律。 |
| 8. | We have built a special experimental set - up to measure brdf at the infrared wavelength and visible wavelength . the spatial brdf distributions of 2 optical surfaces and 5 absorption coat samples
本文在长波红外波段和可见波段，在实验室建立了材料表面brdf的专门测试装置，测得了可见和长波红外波段两个光学镜面和5片“黑色”吸收涂层的brdf的空间分布值。 |
| 9. | Pst denotes optical system capability of suppressing stray light , and brdf represents material surface scatter and reflectance property . these two physical values are the base of stray light analysis and calculation
表示光学系统杂光抑制能力的点源透过率pst和材料表面散射特性的双向反射分布系数brdf ，这两个物理概念是光学系统杂光分析与计算的基础。 |
| 10. | The equation of the radiation transfer between two surfaces indicates that there are three factors that have influence on radiation transfer : brdf , projected solid angle ( psa ) , and incident radiation flux . thereafter , a new baffle system design idea is put forward
本文首先介绍了光学系统杂光的抑制措施，从光辐射在两个表面传递的基本能量传输方程出发，指出影响辐射能量传输的三个因子：双向反射分布系数brdf 、投影立体角psa和入射辐射通量。 |
