DOME II: A Parallelized BTF Acquisition System

Holly Rushmeier and Reinhard Klein (Editors)
In proceedings of Eurographics Workshop on Material Appearance Modeling: Issues and Acquisition, Zaragoza, Spain, pages 25-31, Eurographics Association, June 2013
 

Abstract

Bidirectional Texture Functions (BTFs) provide a realistic depiction of the appearance of many real-world materials as they contain the spatially varying light scattering behavior of the material surface. Since editing of existing BTF data is still in its early stages, materials have to be measured from real-world samples. In contrast to the related Spatially Varying BRDFs (SVBRDFs), the reflectance information encoded in a BTF also includes non-local scattering effects and therefore does not obey energy conservation or reciprocity. While this higher degree of freedom also contributes to an increased realism, it inadvertently calls for an extensive measurement of reflectance samples, as many regularization approaches from BRDF measurement do not apply. In this paper, we present an automated, parallelized, robust, fast and transportable setup for the acquisition of BTFs from flat samples as well as 3D objects using camera and light arrays: the DOME II. In contrast to previous camera array approaches, the present setup, which is comprised of high-quality industry grade components, overcomes several issues regarding stability, reliability and precision. It achieves a well balanced state-of-the-art acquisition performance in terms of speed and quality at reasonable costs.

Keywords: Acquisition, BTF, Camera Array, Digital Material Appearance, Dome, Setup

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Bibtex

@INPROCEEDINGS{schwartz-2013-dome2wmam,
     author = {Schwartz, Christopher and Sarlette, Ralf and Weinmann, Michael and Klein, Reinhard},
     editor = {Rushmeier, Holly and Klein, Reinhard},
      pages = {25--31},
      title = {DOME II: A Parallelized BTF Acquisition System},
  booktitle = {Eurographics Workshop on Material Appearance Modeling: Issues and Acquisition},
       year = {2013},
      month = jun,
  publisher = {Eurographics Association},
   location = {Zaragoza, Spain},
   keywords = {Acquisition, BTF, Camera Array, Digital Material Appearance, Dome, Setup},
   abstract = {Bidirectional Texture Functions (BTFs) provide a realistic depiction of the appearance of many
               real-world materials as they contain the spatially varying light scattering behavior of the material
               surface. Since editing of existing BTF data is still in its early stages, materials have to be
               measured from real-world samples. In contrast to the related Spatially Varying BRDFs (SVBRDFs), the
               reflectance information encoded in a BTF also includes non-local scattering effects and therefore
               does not obey energy conservation or reciprocity. While this higher degree of freedom also
               contributes to an increased realism, it inadvertently calls for an extensive measurement of
               reflectance samples, as many regularization approaches from BRDF measurement do not apply. In this
               paper, we present an automated, parallelized, robust, fast and transportable setup for the
               acquisition of BTFs from flat samples as well as 3D objects using camera and light arrays: the DOME
               II. In contrast to previous camera array approaches, the present setup, which is comprised of
               high-quality industry grade components, overcomes several issues regarding stability, reliability
               and precision. It achieves a well balanced state-of-the-art acquisition performance in terms of
               speed and quality at reasonable costs.},
       isbn = {978-3-905674-48-4},
        url = {http://diglib.eg.org/EG/DL/WS/MAM/MAM2013/025-031.pdf},
        doi = {10.2312/MAM.MAM2013.025-031}
}