Interactive Curved Reflections in Large Point Clouds

poster

thesis

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• Abstract
  
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• Publication Type: Master Thesis
• Month: May
• First Supervisor: Michael Wimmer
• Keywords: mirror space, interactive reflections, curved mirrors, point clouds

@mastersthesis\{pr10,
  title =      "Interactive Curved Reflections in Large Point Clouds",
  author =     "Reinhold Preiner",
  year =       "2010",
  abstract =   "In the field of real-time rendering, computer graphics
               observes a continuously growing power of visualizing of
               scenes of continuously growing complexity. In the past few
               years, a number of rendering techniques have been developed
               that let the quality of the rendered images converge towards
               photorealism. Especially in the field of realistic scene
               illumination, Global Illumination (GI) techniques represent
               an important field of research. Previous to this work, for
               the first time we have applied a GI algorithm also to point
               clouds, which enables us to achieve realistic illumination
               of diffuse and glossy objects in real-time. This thesis
               elevates the power of visualization of this GI-Renderer to
               the next level. For the first time, it implements a
               realistic, physically based rendering of mirroring surfaces
               also for point clouds. Current real-time approaches
               addressing curved mirroring surfaces in polygon scenes
               either are extremely imprecise or cannot handle each
               arbitrary type of surface. Especially concave surfaces
               represent a significant difficulty for current physically
               based methods. Up to now, physically correct mirror
               reflections on complex surfaces can only be produced by
               offline algorithms. We introduce a novel rendering technique
               called "Screen-space curved reflections", which
               enables us to produce physically correct mirror reflections
               on arbitrarily complex surfaces. Our method bases on the
               approach, for each point in the scene to find the pixel in
               the framebuffer that contains its reflecting surface point.
               This is achieved by the application of a fast 2D root
               finding in a new error function called "mirror-space
               error function". Although our method raises high
               demands on the hardware, we are able to render common scenes
               at interactive frame rates.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  school =     "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  month =      5,
  keywords =   "mirror space, interactive reflections, curved mirrors, point
               clouds",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2010/pr10/",
}