Data-driven diffuse-specular separation of spherical gradient illumination
Data-driven diffuse-specular separation of spherical gradient illumination
复制标题
数据驱动的球面梯度照明的漫反射镜面分离
DOI：
10.1145/1599301.1599334
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
P. Debevec
中科院分区：
文献类型：
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作者：
Tongbo Chen;A. Ghosh;P. Debevec
从观测到的反射率中分离漫反射和镜面反射成分一直是计算机图形学和视觉领域的一个活跃研究领域，在反射建模和场景分析中有着重要的应用。传统上，研究人员研究点或定向照明条件下的漫射-光谱分离，同时使用偏振，对于介电材料，使用颜色空间分析技术。最近，马云等人提出了自己的观点。[2007]介绍了一种使用偏振球面渐变照明来估计镜面反射对象的高质量漫反射和镜面反射法线和反照率贴图(参见图1，(A)和(D))的技术。然而，所采用的偏振技术施加了视点限制，并导致高速采集的性能捕获所需的光级不足。因此，在这项工作中，我们研究了一种基于数据驱动反射模型的球面梯度的漫反射-镜面反射交替分离技术。基于颜色空间分析的传统分离技术侧重于从用于场景分析的观测中去除镜面反射[Mallick等人。2005年]。相反，我们专注于获得漫反射和镜面反射分量的高质量估计。
Separation of the diffuse and specular components of observed reflectance has been an active area of research in computer graphics and vision, with major applications in reflectance modeling and scene analysis. Traditionally, researchers have investigated diffusespecular separation under point or directional illumination conditions while employing polarization and, in the case of dielectric materials, color space analysis techniques. Recently, Ma et al. [2007] introduced a technique for estimating high quality diffuse and specular normals and albedo maps (see Fig. 1, (a) & (d)) of a specular object using polarized spherical gradient illumination. However, the employed polarization technique imposes view-point restriction, and results in insufficient light levels for performance capture with high speed acquisition. Hence, in this work, we look into an alternate diffuse-specular separation technique for spherical gradients based on a data-driven reflectance model. Traditional separation techniques based on color space analysis focus on removing specular reflections from the observation for scene analysis [Mallick et al. 2005]. In contrast, we focus on obtaining high quality estimates of both the diffuse and the specular reflectance components.