Fast Environmental Lighting for Local-PCA Encoded BTFs

Keywords: BTF rendering, data compression, material representation, real-time rendering, textures

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@INPROCEEDINGS{mueller-2004-environmental,
      author = {M{\"u}ller, Gero and Meseth, Jan and Klein, Reinhard},
       pages = {198--205},
       title = {Fast Environmental Lighting for Local-PCA Encoded BTFs},
   booktitle = {Computer Graphics International 2004 (CGI 2004)},
        year = {2004},
       month = jun,
   publisher = {IEEE Computer Society},
    keywords = {BTF rendering, data compression, material representation, real-time rendering, textures},
    abstract = {Rendering geometric models with complex surface
                materials in arbitrary lighting environments is a challenging
                problem. In order to relight and render geometries
                covered with complex, measured BTFs two
                problems have to be addressed: The memory problem
                resulting from the large size of the measured BTF data
                and the light integration problem resulting from summing
                up the contributions from all measured lightsources.
                
                In this paper we describe how highly efficient BTF
                compression methods like Local-PCA and suitable
                representations of environmental light based on
                Spherical Harmonics can be combined leading to fast
                environmental lighting for efficiently encoded BTFs.
                As a side effect the method supports Precomputed Radiance
                Transfer.},
        issn = {1530-1052},
        isbn = {0-7695-2171-1},
  conference = {Computer Graphics International 2004 (CGI 2004)}
}