Real-Time Occlusion Culling With A Lazy Occlusion Grid

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• Publication Type: Technical Report
• Keywords: hardware accelerated rendering, real-time rendering, visibility, occlusion culling

@techreport\{Hey-2001-ReaX,
  title =      "Real-Time Occlusion Culling With A Lazy Occlusion Grid",
  author =     "Heinrich Hey and Robert F. Tobler and Werner Purgathofer",
  year =       "2001",
  abstract =   "We present a new conservative image-based occlusion culling
               method to increase the speed of hardware accelerated
               rendering of very complex general scenes which may consist
               of millions of polygons without time-expensive
               preprocessing. The method is based on a low-resolution grid
               upon a conventional z-buffer or an occlusion-buffer. This
               grid is updated in a lazy manner which reduces the number of
               expensive occlusion queries at pixel-level significantly
               compared to a busy update. It allows fast decisions if an
               object is occluded or potentially visible. The grid is used
               together with a bounding volume hierarchy that is traversed
               in a front to back order and which allows to cull large
               parts of the scene at once. We show that the method works
               efficiently on todayŽs available hardware and we compare
               lazy and busy updates.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  month =      jan,
  number =     "TR-186-2-01-02",
  keywords =   "hardware accelerated rendering, real-time rendering,
               visibility, occlusion culling",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2001/Hey-2001-ReaX/",
}