@InProceedings{MedeirosSousVelhFrei:2009:PeCoIl,
               author = "Medeiros, Jonatas and Sousa, Mario and Velho, Luiz Carlos Pacheco 
                         Rodrigues and Freitas, Carla",
          affiliation = "Institute of Informatics, UFRGS and Department of Computer 
                         Science, University of Calgary and IMPA and Institute of 
                         Informatics, UFRGS",
                title = "Perspective Contouring in Illustrative Visualization",
            booktitle = "Proceedings...",
                 year = "2009",
               editor = "Nonato, Luis Gustavo and Scharcanski, Jacob",
         organization = "Brazilian Symposium on Computer Graphics and Image Processing, 22. 
                         (SIBGRAPI)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "illustrative visualization, focus of attention, line illustration, 
                         hatching, non-photorealistic rendering.",
             abstract = "Although traditional line illustrations are very abstract 
                         representations, they can communicate the form of an object 
                         effectively. This is only possible by the use of perceptual cues, 
                         mastered by professional artists. To create effective line 
                         illustrations from 3D models, it is important to use these 
                         perceptual cues to avoid visual dissonance and ambiguity, and also 
                         to create visual effects like shading, emphasis and depth 
                         perception. In this paper, we propose the adaptation of a 
                         technique called Perspective Contouring, used by illustrators to 
                         create emphasis in contour line drawings. The technique uses 
                         perceptual principles to manipulate line attributes, like width, 
                         spacing and length, around regions of interest determined by the 
                         user, creating the illusion that those regions advance towards the 
                         observer. The whole process is controlled through an intuitive 
                         sketch-based interface.",
  conference-location = "Rio de Janeiro, RJ, Brazil",
      conference-year = "11-14 Oct. 2009",
                  doi = "10.1109/SIBGRAPI.2009.49",
                  url = "http://dx.doi.org/10.1109/SIBGRAPI.2009.49",
             language = "en",
                  ibi = "8JMKD3MGPBW4/35S9LKS",
                  url = "http://urlib.net/ibi/8JMKD3MGPBW4/35S9LKS",
           targetfile = "PID961384.pdf",
        urlaccessdate = "2024, May 01"
}