Point-Based Impostors for Real-Time Visualization

Michael Wimmer, Peter Wonka, François Sillion
Point-Based Impostors for Real-Time Visualization
TR-186-2-01-15, September 2001 [ paper]
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Replaced by Wimmer-2001-Poi.

Abstract

We present a new data structure for encoding the appearance of a geometric model as seen from a viewing region (view cell). This representation can be used in interactive or real-time visualization applications to replace a complex model by an impostor, maintaining high quality rendering while cutting down rendering time. Our approach relies on an object-space sampled representation similar to a point cloud or a layered depth image, but introduces two fundamental additions to previous techniques. First, the sampling rate is controlled to provide sufficient density across all possible viewing conditions from the specified view cell. Second, a correct, antialiased representation of the plenoptic function is computed using Monte Carlo integration. Our system therefore achieves high quality rendering using a simple representation with bounded complexity. We demonstrate the method for an application in urban visualization.

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@techreport{Wimmer-2001-PBI,
  title =      "Point-Based Impostors for Real-Time Visualization",
  author =     "Michael Wimmer and Peter Wonka and Fran{\c c}ois Sillion",
  year =       "2001",
  abstract =   "We present a new data structure for encoding the appearance
               of a geometric model as seen from a viewing region (view
               cell). This representation can be used in interactive or
               real-time visualization applications to replace a complex
               model by an impostor, maintaining high quality rendering
               while cutting down rendering time. Our approach relies on an
               object-space sampled representation similar to a point cloud
               or a layered depth image, but introduces two fundamental
               additions to previous techniques. First, the sampling rate
               is controlled to provide sufficient density across all
               possible viewing conditions from the specified view cell.
               Second, a correct, antialiased representation of the
               plenoptic function is computed using Monte Carlo
               integration. Our system therefore achieves high quality
               rendering using a simple representation with bounded
               complexity. We demonstrate the method for an application in
               urban visualization.",
  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 =      sep,
  number =     "TR-186-2-01-15",
  keywords =   "impostors, point-based rendering, real-time rendering, urban
               visualization",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-PBI/",
}