Fast Walkthroughs with Image Caches and Ray Casting

Michael Wimmer, Markus Giegl, Dieter Schmalstieg
Fast Walkthroughs with Image Caches and Ray Casting
In Virtual Environments '99. Proceedings of the 5th Eurographics Workshop on Virtual Environments, pages 73-84. June 1999.
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Abstract

We present an output-sensitive rendering algorithm for accelerating walkthroughs of large, densely occluded virtual environments using a multi-stage Image Based Rendering Pipeline. In the first stage, objects within a certain distance are rendered using the traditional graphics pipeline, whereas the remaining scene is rendered by a pixel-based approach using an Image Cache, horizon estimation to avoid calculating sky pixels, and finally, ray casting. The time complexity of this approach does not depend on the total number of primitives in the scene. We have measured speedups of up to one oder of magnitude.

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@inproceedings{Wimmer-1999-FWIa,
  title =      "Fast Walkthroughs with Image Caches and Ray Casting",
  author =     "Michael Wimmer and Markus Giegl and Dieter Schmalstieg",
  year =       "1999",
  abstract =   "We present an output-sensitive rendering algorithm for
               accelerating walkthroughs of large, densely occluded virtual
               environments using a multi-stage Image Based Rendering
               Pipeline. In the first stage, objects within a certain
               distance are rendered using the traditional graphics
               pipeline, whereas the remaining scene is rendered by a
               pixel-based approach using an Image Cache, horizon
               estimation to avoid calculating sky pixels, and finally, ray
               casting. The time complexity of this approach does not
               depend on the total number of primitives in the scene. We
               have measured speedups of up to one oder of magnitude.",
  pages =      "73--84",
  month =      jun,
  organization = "Eurographics",
  booktitle =  "Virtual Environments '99. Proceedings of the 5th
               Eurographics Workshop on Virtual Environments",
  editor =     "Michael Gervautz and Dieter Schmalstieg and Axel Hildebrand",
  isbn =       "3-211-83347-1",
  publisher =  "Springer-Verlag Wien",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/",
}