Integrated High-Quality Acquisition of Geometry and Appearance for Cultural Heritage

Christopher Schwartz, Michael Weinmann, Roland Ruiters, and Reinhard Klein
In proceedings of The 12th International Symposium on Virtual Reality, Archeology and Cultural Heritage VAST 2011, Eurographics Association, Prato, Italy, pages 25-32, Eurographics Association, Oct. 2011
 

Abstract

Current research trends demonstrate that, for a wide range of applications in cultural heritage, 3D shape acquisition alone is not sufficient. To generate a digital replica of a real world object the digitized geometric models have to be complemented with information pertaining to optical properties of the object surface. We therefore propose an integrated system for acquiring both the 3D shape and reflectance properties necessary for obtaining a photo-realistic digital replica. The proposed method is suitable for the digitization of objects showing the complex reflectance behavior, for example specularities and meso-scale interreflections, often encountered in the field of cultural heritage. We demonstrate the performance of our system with four challenging examples. By using Bidirectional Texture Functions, our structured light based approach is able to achieve good geometric precision while preserving tiny details such as scratches and engravings.

Keywords: 3D scanning, BTF, BTF acquisition, BTF compression, BTF resampling, cultural heritage, digitization, geometry acquisition, virtual replicas

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@INPROCEEDINGS{schwartz-2011-hqdomeacquisition,
        author = {Schwartz, Christopher and Weinmann, Michael and Ruiters, Roland and Klein, Reinhard},
         pages = {25--32},
         title = {Integrated High-Quality Acquisition of Geometry and Appearance for Cultural Heritage},
     booktitle = {The 12th International Symposium on Virtual Reality, Archeology and Cultural Heritage VAST 2011},
          year = {2011},
         month = oct,
     publisher = {Eurographics Association},
      location = {Prato, Italy},
  organization = {Eurographics Association},
      keywords = {3D scanning, BTF, BTF acquisition, BTF compression, BTF resampling, cultural heritage, digitization,
                  geometry acquisition, virtual replicas},
      abstract = {Current research trends demonstrate that, for a wide range of applications in cultural heritage, 3D
                  shape acquisition alone is not sufficient.
                  To generate a digital replica of a real world object the digitized geometric models have to be
                  complemented with information pertaining to optical properties of the object surface.
                  We therefore propose an integrated system for acquiring both the 3D shape and reflectance properties
                  necessary for obtaining a photo-realistic digital replica.
                  The proposed method is suitable for the digitization of objects showing the complex reflectance
                  behavior, for example specularities and meso-scale interreflections, often encountered in the field
                  of cultural heritage.
                  We demonstrate the performance of our system with four challenging examples.
                  By using Bidirectional Texture Functions, our structured light based approach is able to achieve
                  good geometric precision while preserving tiny details such as scratches and engravings.},
          issn = {1811-864X},
          isbn = {978-3-905674-34-7},
           url = {http://diglib.eg.org/EG/DL/WS/VAST/VAST11/025-032.pdf},
           doi = {10.2312/VAST/VAST11/025-032}
}