BIB-VERSION:: CS-TR-v2.0
          ID:: STAN//CS-TN-97-60
       ENTRY:: October 07, 1997
ORGANIZATION:: Stanford University, Department of Computer Science
       TITLE:: Efficient Linear Re-rendering for Interactive Lighting Design
        TYPE:: Technical Note
      AUTHOR:: Teo, Patrick C.
      AUTHOR:: Simoncelli, Eero P.
      AUTHOR:: Heeger, David J.
        DATE:: October 1997
       PAGES:: 17
    ABSTRACT:: We present a framework for interactive lighting design based
               on linear re-rendering. The rendering operation is linear
               with respect to light sources, assuming a fixed scene and
               camera geometry. This linearity means that a scene may be
               interactively re-rendered via linear combination of a set of
               basis images, each rendered under a particular basis light.
               We focus on choosing and designing a suitable set of basis
               lights. We provide examples of bases that allow 1)
               interactive adjustment of a spotlight direction, 2)
               interactive adjustment of the position of an area light, and
               3) a combination in which light sources are adjusted in both
               position and direction. We discuss a method for reducing the
               size of the basis using principal components analysis in the
               image domain.
       NOTES:: [Adminitrivia V1/Prg/19971007]
         END:: STAN//CS-TN-97-60