Browsing by Author "Sbert Cassasayas, Mateu"

Now showing items 1-14 of 14

    • A Global algorithm for linear radiosity 

      Sbert Cassasayas, Mateu; Pueyo Sánchez, Xavier (1993-11)
      External research report
      Open Access
      A linear algorithm for radiosity is presented, linear both in time and storage. The new algorithm is based on previous work by the authors and on the well known algorithms for progressive radiosity and Monte Carlo particle ...

    • An Integral geometry based method for fast form-factor computation 

      Sbert Cassasayas, Mateu (1993-01)
      External research report
      Open Access
      Monte Carlo techniques have been widely used in rendering algorithms for local integration. For example, to compute the contribution of a patch to the luminance of another. In the present paper we propose ...

    • Applications of information theory to computer graphics 

      Sbert Cassasayas, Mateu; Feixas, Miquel; Rigau, Jaume; Castro, Francesc; Vázquez Alcocer, Pere Pau (2002)
      Conference report
      Restricted access - publisher's policy
      We present in this talk several applications of Information Theory concepts to Computer Graphics. Mutual information will be applied to Radiosity to obtain the better scene discretization. The concept of entropy will be ...

    • Automatic indoor scene exploration 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2003)
      Conference report
      Restricted access - publisher's policy
      Automatic computation of best views of objects are very useful. For example, they can be used as the starting point of a scene exploration, or to enrich galleries of objects available through Internet by adding an image a ...

    • Automatic keyframe selection for high-quality image-based walkthrough animation using viewpoint entropy 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2002-02)
      Article
      Open Access
      The computation of high quality animation sequences is expensive. Generation time for each frame can take a few hours Recently, Image-Based Rendering methods have been proposed to solve this problem. As these techniques ...

    • Automatic view selection using viewpoint entropy and its application to image-based modelling 

      Vázquez Alcocer, Pere Pau; Feixas, Miquel; Sbert Cassasayas, Mateu; Heidrich, Wolfgang (North Holland, 2003)
      Article
      Restricted access - publisher's policy
      In the last decade a new family of methods, namely Image-Based Rendering, has appeared. These techniques rely on the use of precomputed images to totally or partially substitute the geometric representation of the scene. ...

    • Bandwidth reduction for remote navigation systems through view prediction and progressive transmission 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (Elsevier Science Direct, 2004)
      Article
      Restricted access - publisher's policy
      Remote navigation systems, such as exploration of virtual 3D worlds or remote surgery, usually require higher bandwidth than the Internet connection commonly available at home. In this paper,we explore a set of techniques ...

    • Bandwidth reduction techniques for remote navigation systems 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2002)
      Conference report
      Restricted access - publisher's policy
      In this paper we explore a set of techniques to reduce the bandwidth in remote navigation systems. These systems, such as exploration of virtual 3D worlds or remote surgery, usually require higher bandwidth than the common ...

    • Fast adaptive selection of best views 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2003)
      Conference report
      Restricted access - publisher's policy
      Automatic computation of best views of objects is very useful. For example, they can be used as the starting point of a scene exploration, or to enrich galleries of objects available through Internet by adding an image a ...

    • Image-based modeling using viewpoint entropy 

      Vázquez Alcocer, Pere Pau; Feixas, Miquel; Sbert Cassasayas, Mateu; Heidrich, Wolfgang (2002)
      Conference report
      Open Access
      We present a new method to automatically determine the correct camera placement positions in order to obtain a minimal set of views for Image-Based Rendering. The viewpoints should cover all visible polygons with an adequate ...

    • On the fly best view detection using graphics hardware 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2004)
      Conference report
      Restricted access - publisher's policy
      Selection of good camera positions has many applications in Computer Graphics. It can be used to compute a walkthrough inside a scene that shows a higher amount of information or to select a minimal set of views for ...

    • Perception-based illumination information measurement and light source placement 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2003)
      Conference report
      Restricted access - publisher's policy
      The automatic selection of good viewing parameters is very complex. In most cases, the notion of good strongly depends on the concrete application. Moreover, when an intuitive definition of good view is available, it is ...

    • Point-based modeling from a single image 

      Vázquez Alcocer, Pere Pau; Marco Gómez, Jordi; Sbert Cassasayas, Mateu (2004)
      Conference report
      Restricted access - publisher's policy
      The complexity of virtual environments has grown spectacularly over the recent years, mainly thanks to the use of the currently cheap high performance graphics cards. As the graphics cards improve the performance and the ...

    • Viewpoint selection using viewpoint entropy 

      Vázquez Alcocer, Pere Pau; Feixas, Miquel; Sbert Cassasayas, Mateu; Heidrich, Wolfgang (2001)
      Conference report
      Restricted access - publisher's policy
      Computation of good viewpoints is important in several fields: computational geometry, visual servoing, robot motion, graph drawing, etc. In addition, selection of good views is rapidly becoming a key issue in computer ...