基于数码相机的双向反射率分布函数测量方法  

Measuring bidirectional reflectance distribution function using a single digital camera

作　　者：张洪[1] 熊汉伟[1] 王金明[1] 张湘伟[1] 

机构地区：[1]广东工业大学机电工程学院,广州510090

出　　处：《光学技术》2008年第6期892-895,共4页Optical Technique

基　　金：国家自然科学基金资助项目(50775044);广东省自然科学基金资助项目(07117422);广州市科技计划资助项目(2006Z3D9031)

摘　　要：除传统领域外,双向反射率分布函数(BRDF)在计算机图形学、虚拟现实等方面具有广泛的应用,但缺乏价格适中的测量工具。试验了一种基于单个数码相机的BRDF测量方法。该法综合了摄影测量学、光学、计算机图形学等学科的知识,测量装置成本低廉、易于实现,并集成于专门编制的测量程序中。测量操作过程方便、易行,测量数据可直接以视化形式输出。给出了某种油漆的测量实例,初步验证了该方法的可行性。A new image-based process is presented for measuring a surface＇s bidirectional reflectance rapidly and accurately. Requiring only one digital camera, a light source, and a test sample of sphere, the method generates densely spaced samples coveting a large domain of illumination and reflection directions. The hardware configuration and data process flow are introduced, and mathematical formulations behind the approach are given. A prototype system is realized, which can be used for a variety of materials, and a complete experiment on paints is demonstrated, and the results verify the validity of the new method.

关 键 词：BRDF测量 摄影测量学 图像处理 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]