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1@InProceedings{Drettakis:1996:AVM,
2  author =       "George Drettakis and Fran{\c{c}}ois Sillion",
3  title =        "Accurate Visibility and Meshing Calculations for
4                 Hierarchical Radiosity",
5  booktitle =    "Eurographics Rendering Workshop 1996",
6  editor =       "Xavier Pueyo and Peter Schr{\"{o}}der",
7  year =         "1996",
8  organization = "Eurographics",
9  publisher =    "Springer Wein",
10  address =      "New York City, NY",
11  month =        jun,
12  pages =        "269--278",
13  note =         "ISBN 3-211-82883-4",
14  annote =       "Precise quality control for hierarchical lighting
15                 simulations is still a hard problem, due in part to the
16                 difficulty of analysing the source of error and to the
17                 close interactions between different components of the
18                 algorithm. In this paper we attempt to address this
19                 issue by examining two of the most central components
20                 of these algorithms: visibility computation and the
21                 mesh. We first present an investigation tool in the
22                 form of a new hierarchical algorithm: this algorithmic
23                 extension encapsulates exact visibility information
24                 with respect to the light source in the form of the
25                 backprojection data structure, and allows the use of
26                 discontinuity meshes in the solution hierarchy. This
27                 tool permits us to study separately the effects of
28                 visibility and meshing error on image quality,
29                 computational expense as well as solution convergence.
30                 Initial experimental results are presented by comparing
31                 standard quadtree-based hierarchical radiosity with
32                 point-sampling visibility to the approaches
33                 incorporating backprojections, discontinuity meshes or
34                 both.",
35}
36
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