| 基于数码相机的双向反射率分布函数测量方法 |
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| 引用本文： | 张洪,熊汉伟,王金明,张湘伟.基于数码相机的双向反射率分布函数测量方法[J].光学技术,2008,34(6). |
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| 作者姓名： | 张洪 熊汉伟 王金明 张湘伟 |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金，广东省广州市科技计划 |
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| 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。
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| 关 键 词： | BRDF测量 摄影测量学 图像处理 |
Measuring bidirectional reflectance distribution function using a single digital camera |
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| Abstract: | 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 cov- ering 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. |
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| Keywords: | measurement of bidiredctional reflectance distribution function(BRDF) photogrammetry image Processing |
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