Abstract: The Bidirectional Reflectance Distribution Function (BRDF) of iridescent (or goniochromatic) surfaces may vary notably with both spectral and angular variables, and, therefore, finite spectral bandwidth and collection solid angles inherent to any measuring instrument introduce a deviation from the correct value.

2019年8月9日 · IO-CSIC and PTB have investigated the variation of the spectral BRDF of the four most typical white diffuse reflectance standards (barium sulfate, opal glass, ceramic and Spectralon), within the spectral range between 380 nm and 1700 nm, in order to assess their deviation from the PRD.

2023年6月15日 · 本文主要介绍了一种BRDF数据采集装置，通过光束控制镜头及极化控制，输出了确定大小的入射光源，通过自动电控的旋转手臂调节入射光角度，样品安装在一个二维调节的的实验平台上，从而采集不同角度的图像，光源采集部分使用了光谱采集设备；软件代码实现了采集的全自动控制，包括参考光源的自矫正等，最后通过采集了两种材料评估了设备的基本性能能够满足BRDF采集需求，验证方向主要包括了能量守恒原理，互换定律。 4. 《Experimental …

We investigated the variation of the Bidirectional Reflectance Distribution Function (BRDF) with respect to the bidirectional geometry oc:450 for the four most typical diffuse reflectance standards (barium sulphate, opal glass, ceramic tile and Spectralon), whose detailed descriptions in terms of reflectance can be found in [4].

Bidirectional Reflectance Distribution Function (BRDF) measurements have been carried out on oil paint samples in order to determine their spectral and angular distribution of the reflectance. The gonio-spectrophotometer setup at the CSIC (Figure 1) …

2020年11月21日 · The Bidirectional Reflectance Distribution Function (BRDF) of iridescent (or goniochromatic) surfaces may vary notably with both spectral and angular variables, and, therefore, finite spectral bandwidth and collection solid angles inherent to any measuring instrument introduce a deviation from the correct value.

2011年9月26日 · The Bidirectional Reflectance Distribution Function (BRDF) is essential to characterize an object's reflectance properties. This function depends both on the various illumination-observation geometries as well as on the wavelength. As a result, the comprehensive interpretation of the data becomes ra …

针对粗糙物体表面在不同波段光照下表现出不同的偏振反射特性，提出一种基于Kirchhof理论的偏振光谱BRDF模型。 利用已知材质在不同波长下的复折射率，对其折射率和消光系数部分分别反演出的对应光谱模型，进而得到复折射率的光谱模型;同借鉴经典的表面粗糙度测量方法，结合菲涅耳反射公式，推导出表面粗糙度的光谱模型，将得到的复折射率和粗糙度光谱模型与BRDF模型相结合，推导出偏振光谱BRDF建模。 模型分别在折射率随波长变化、粗糙度为常量，折射率、粗 …

2012年12月20日 · A study on the variation of the spectral bidirectional reflectance distribution function (BRDF) of four diffuse reflectance standards (matte ceramic, BaSO(4), Spectralon, and white Russian opal glass) is accomplished through this work. Spectral BRDF measurements were carried out and, using principal …

经验brdf模型是能够简单地模拟材质表面反射特性的数学表达式,是在已 知大量实验数据且合理运用数学知识的基础上总结的BRDF模型。 此类模型的建