@InProceedings{FaveraCele:2012:AmOcUs,
author = "Favera, Eduardo Ceretta Dalla and Celes, Waldemar",
affiliation = "Computer Science Department, PUC-Rio and Computer Science
Department, PUC-Rio",
title = "Ambient occlusion using cone tracing with scene voxelization",
booktitle = "Proceedings...",
year = "2012",
editor = "Freitas, Carla Maria Dal Sasso and Sarkar, Sudeep and Scopigno,
Roberto and Silva, Luciano",
organization = "Conference on Graphics, Patterns and Images, 25. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "Ambient occlusion, cone tracing, global ilumination.",
abstract = "Ambient occlusion is a low-cost technique to simulate indirect
ambient illumination in a realistic way. The goal is to estimate
the amount of incident ambient light at each visible point. In
this paper, we propose a novel ambient occlusion method that
produces good quality results in real time. Using an efficient
voxelization algorithm, we create a volumetric description of the
scene geometry in a regular grid. During scene rendering, the
hemisphere around each visible point is sampled by a set of cones,
each one representing a package of rays. The volume of each cone
is sampled by a series of spheres. The obstructed volumes of the
spheres are used to estimate the amount of rays that are blocked
by the scene geometry. The final ambient occlusion at each visible
point is computed by considering all cones in the hemisphere. This
approach has shown to be quite adequate: the intersection of each
sphere with the voxelized scene is performed in a very efficient
manner, and good quality results are achieved with a small number
of cones. Computational experiments demonstrate the efficiency and
effectiveness of our proposal.",
conference-location = "Ouro Preto, MG, Brazil",
conference-year = "22-25 Aug. 2012",
doi = "10.1109/SIBGRAPI.2012.28",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2012.28",
language = "en",
ibi = "8JMKD3MGPBW34M/3CETK52",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3CETK52",
targetfile = "main.pdf",
urlaccessdate = "2024, Apr. 29"
}