Now showing items 1-20 of 49

  • 3D model deformations with arbitrary control points 

    Cerveró Abelló, Maria Àngels; Vinacua Pla, Álvaro; Brunet Crosa, Pere (2016-06-01)
    Article
    Open Access
    Cage-based space deformations are often used to edit and animate images and geometric models. The deformations of the cage are easily transferred to the model by recomputing fixed convex combinations of the vertices of the ...
  • 3D triangular mesh to represent the left ventricle volume of the heart 

    Rodriguez, Lyudmila; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2002-07-01)
    External research report
    Open Access
    This report describes an algorithm for the generation of unstructured tetrahedral meshes from two triangular meshes: the internal and external walls of an object. The tetrahedral mesh thus obtained represents the volume ...
  • Adaptive on-the-fly molecular ribbons generation 

    Hermosilla, Pedro; Guallar, Víctor; Vinacua Pla, Álvaro; Vázquez Alcocer, Pere Pau (European Association for Computer Graphics (Eurographics), 2015)
    Conference lecture
    Open Access
    Molecular dynamics simulations are of key importance in the drug design field. One common used representation to visualize these simulations is the Ribbons representation, which gives to the expert a good overview of the ...
  • A general illumination model for molecular visualization 

    Hermosilla Casajús, Pedro; Vázquez Alcocer, Pere Pau; Vinacua Pla, Álvaro; Ropinski, Timo (2018-06)
    Article
    Restricted access - publisher's policy
    Several visual representations have been developed over the years to visualize molecular structures, and to enable a better understanding of their underlying chemical processes. Today, the most frequently used atom-based ...
  • A multi-projector CAVE system with commodity hardware and gesture-based interaction 

    Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Vinacua Pla, Álvaro; Vico Moya, Miguel Ángel; Díaz García, Jesús (2017-01-12)
    External research report
    Open Access
    Spatially-immersive systems such as CAVEs provide users with surrounding worlds by projecting 3D models on multiple screens around the viewer. Compared to alternative immersive systems such as HMDs, CAVE systems are a ...
  • Approximation of a variable density cloud of points by shrinking a discrete membrane 

    Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (2002-12)
    External research report
    Open Access
    This paper describes a method to obtain a closed surface that approximates a general 3D data point set with non-uniform density. Excluding the initial data points, any other previous information is not used (as, for ...
  • Approximation of a variable density cloud of points by shrinking a discrete membrane 

    Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (North Holland, 2005-12)
    Article
    Restricted access - publisher's policy
    This paper describes a method to obtain a closed surface that approximates a general 3D data point set with nonuniform density. Aside from the positions of the initial data points, no other information is used. Particularly, ...
  • A Survey on curve and surface fairing 

    Vivo Lorenzo, Manuel; Vinacua Pla, Álvaro (1998-09)
    External research report
    Open Access
    Sculptured or free-form surface design is a broadly used tool in industry. This report studies the existing automatic fairing methods for curves and surfaces. A classification is established and advantages and drawbacks ...
  • ATLAS, a platform for distributed graphics applications 

    Fairén González, Marta; Vinacua Pla, Álvaro (1997-11)
    External research report
    Open Access
    ATLAS, a platform for developing distributed applications by splitting them into several collaborating processes scattered in a local area network is presented. Although of general use, it has features especially designed ...
  • ATLAS, a platform for distributed graphics applications 

    Fairén González, Marta; Vinacua Pla, Álvaro (1997)
    Conference report
    Open Access
    ATLAS, a platform for developing distributed applications by splitting them into several collaborating processes scattered in a local area network is presented. Although of general use, it has features especially designed ...
  • ATLAS, a platform for transparently developing distributed applications 

    Fairén González, Marta; Vinacua Pla, Álvaro (Yi Pan, Selim G. Akl, Kegin Li. Anaheim, USA, 1998)
    Conference report
    Open Access
    We discuss the design and implementation of a software development platform that allows unsophisticated programmers to include advanced features to their applications with no or very little extra information and effort. ...
  • ATLAS: a platform for transparently developing distributed applications 

    Fairén González, Marta; Vinacua Pla, Álvaro (1997-11)
    External research report
    Open Access
    We discuss the design and implementation of a software development platform that allows unsophisticated programmers to include advanced features to their applications with no or very little extra information and effort. ...
  • A topological comparison of surface extraction algorithms 

    Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2006-01)
    External research report
    Open Access
    In many application areas, it is useful to convert the discrete information stored in the nodes of a regular grid into a continuous boundary model. Isosurface extraction algorithms di er on how the discrete information in ...
  • Automatic code generation for ATLAS communications drivers 

    Vivo Lorenzo, Manuel; Fairén González, Marta; Vinacua Pla, Álvaro (1999-12)
    External research report
    Open Access
    ATLAS is a software development platform created in our Department. Among other benefits, it provides support to easily distribute applications over a network. In these applications, communications issues among the different ...
  • Biharmonic fields and mesh completion 

    Argudo Medrano, Óscar; Brunet Crosa, Pere; Chica Calaf, Antonio; Vinacua Pla, Álvaro (2015-11)
    Article
    Open Access
    We discuss bi-harmonic fields which approximate signed distance fields. We conclude that the bi-harmonic field approximation can be a powerful tool for mesh completion in general and complex cases. We present an adaptive, ...
  • Computing maximal tiles and application to impostor-based simplification 

    Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (North Holland, 2004-08)
    Article
    Restricted access - publisher's policy
    The computation of the largest planar region approximating a 3D object is an important problem with wide applications in modeling and rendering. Given a voxelization of the 3D object, we propose an efficient algorithm to ...
  • Data-driven tetrahedral mesh subdivision 

    Rodríguez Pérez, Lyudmila Odalina; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (North Holland, 2007-12)
    Article
    Restricted access - publisher's policy
    Given a tetrahedral mesh immersed in a voxel model, we present a method to refine the mesh to reduce the discrepancy between interpolated values based on either scheme at arbitrary locations. An advantage of the method ...
  • Data-driven tetrahedral mesh subdivision 

    Rodríguez Pérez, Lyudmila Odalina; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2006-09)
    External research report
    Open Access
    Given a tetrahedral mesh immersed in a voxel model, we present a method to refine the mesh to reduce the discrepancy between interpolated values based on either scheme at arbitrary locations. An advantage of the method ...
  • Estado del arte de la alineación de imágenes médicas e implementación del algoritmo de alineación clásico basado en la información mutua 

    Murillo Pavas, Santiago; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2005-05)
    External research report
    Open Access
    La alineación de imágenes cardíacas procedentes de imágenes de medicina nuclear tal como la Tomografía Computerizada por Emisión Única de Positrones (SPECT) constituye un campo de investigación activo dada su importancia ...
  • Geometric transformations in octrees using shears 

    Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (1997-12)
    External research report
    Open Access
    Existent algorithms to perform geometric transformations on octrees can be classified in two families: inverse transformation and address computation ones. Those in the inverse transformation family essentially resample ...