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",
      conference-year = "Aug. 22-25, 2012",
             language = "en",
           targetfile = "main.pdf",
        urlaccessdate = "2021, Jan. 28"