Spectralization: Reconstructing spectra from sparse data

Jason Lawrence and Marc Stamminger (Editors)
In proceedings of SR '10 Rendering Techniques, pages 1347-1354, Eurographics Association, June 2010
 

Abstract

Traditional RGB reflectance and light data suffers from the problem of metamerism and is not suitable for rendering purposes where exact color reproduction under many different lighting conditions is needed. Nowadays many setups for cheap and fast acquisition of RGB or similar trichromatic datasets are available. In contrast to this, multi- or even hyper-spectral measurements require costly hardware and have severe limitations in many cases. In this paper, we present an approach to combine efficiently captured RGB data with spectral data that can be captured with small additional effort for example by scanning a single line of an image using a spectral line-scanner. Our algorithm can infer spectral reflectances and illumination from such sparse spectral and dense RGB data. Unlike other approaches, our method reaches acceptable perceptual errors with only three channels for the dense data and thus enables further use of highly efficient RGB capture systems. This way, we are able to provide an easier and cheaper way to capture spectral textures, BRDFs and environment maps for the use in spectral rendering systems.

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Bibtex

@INPROCEEDINGS{rump-2010-spectralization,
     author = {Rump, Martin and Klein, Reinhard},
     editor = {Lawrence, Jason and Stamminger, Marc},
      pages = {1347--1354},
      title = {Spectralization: Reconstructing spectra from sparse data},
  booktitle = {SR '10 Rendering Techniques},
       year = {2010},
      month = jun,
  publisher = {Eurographics Association},
    address = {Saarbruecken, Germany},
   abstract = {Traditional RGB reflectance and light data suffers from the problem of metamerism and is not
               suitable for rendering purposes where exact color reproduction under many different lighting
               conditions is needed. Nowadays many setups for cheap and fast acquisition of RGB or similar
               trichromatic datasets are available. In contrast to
               this, multi- or even hyper-spectral measurements require costly hardware and have severe limitations
               in many cases. In this paper, we present an approach to combine efficiently captured RGB data with
               spectral data that can be captured with small additional effort for example by scanning a single
               line of an image using a spectral
               line-scanner. Our algorithm can infer spectral reflectances and illumination from such sparse
               spectral and dense RGB data. Unlike other approaches, our method reaches acceptable perceptual
               errors with only three channels for the dense data and thus enables further use of highly efficient
               RGB capture systems. This way, we are able
               to provide an easier and cheaper way to capture spectral textures, BRDFs and environment maps for
               the use in spectral rendering systems.},
       issn = {0167-7055},
        url = {http://www.eg.org/EG/DL/CGF/volume29/issue4/v29i4pp1347-1354.pdf.abstract.pdf;internal&action=action.digitallibrary.paperbibtex}
}