Entry McGuire:2004:OSS from jgraphtools.bib

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BibTeX entry

@Article{McGuire:2004:OSS,
  author =       "Morgan McGuire",
  title =        "Observations on Silhouette Sizes",
  journal =      j-J-GRAPHICS-TOOLS,
  volume =       "9",
  number =       "1",
  pages =        "1--12",
  year =         "2004",
  CODEN =        "JGTOFD",
  ISSN =         "1086-7651",
  ISSN-L =       "1086-7651",
  bibdate =      "Sat Dec 04 10:50:51 2004",
  bibsource =    "http://www.math.utah.edu/pub/tex/bib/jgraphtools.bib",
  URL =          "http://www.acm.org/jgt/papers/McGuire04/",
  abstract =     "Silhouettes have many applications in computer
                 graphics such as non-photorealistic edge rendering, fur
                 rendering, shadow volume creation, and anti-aliasing.
                 The number of edges, $s$, in the silhouette of a model
                 observed from a point is therefore useful in analyzing
                 such algorithms. \par

                 This paper examines, from a theoretical viewpoint, a
                 menagerie of objects with interesting silhouettes
                 (including those with minimal and maximal silhouettes).
                 It shows that the relationship between and $s$ and the
                 number of triangles in a model, $f$, is bounded above
                 by $s = O(f)$ and below by $s = \Omega(1)$, and that
                 the expected value of $s$ over all observation points
                 at infinity is proportional to the sum of the dihedral
                 angles. \par

                 In practice, the models used with silhouette-based
                 rendering algorithms are triangle meshes that are
                 manually constructed or result from scans of human-made
                 objects. They consist of only surface geometry with few
                 cracks; there is no internal detail like the engine
                 under a car's hood. Geometric and aesthetic constraints
                 on these models appear to create an inherent
                 relationship between $f$ and $s$. Measurements of the
                 actual silhouettes of real-world 3D models with polygon
                 counts varied across six orders of magnitude show them
                 to follow the relationship $s \sim f^{0.8}$.
                 Furthermore, the expected value of $s$ at infinity is a
                 good approximation of the expected silhouette size for
                 a viewer at a finite location.",
  acknowledgement = ack-nhfb,
  journal-URL =  "http://www.tandfonline.com/loi/ujgt20",
}

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