Ara es mostren els items 1-20 de 88

  • 3D texture-based hybrid visualizations 

    Boada, Imma; Navazo Álvaro, Isabel (2003-01)
    Article
    Accés restringit per política de l'editorial
    In this paper, the visualization of hybrid scenes that contain volume data and a fitted extracted surface is addressed. The proposed algorithm is based on a integrated octree-based representation: the ‘‘hybrid octree.’’ ...
  • 3D triangular mesh to represent the left ventricle volume of the heart 

    Rodriguez, Lyudmila; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2002-07-01)
    Report de recerca
    Accés obert
    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 ...
  • A 3D System for training in endoscopical repair of subcondylar fractures of the mandible 

    Hueto, Joan A.; Díaz, José; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Raspall, G. (Springer Verlag, 2008)
    Article
    Accés obert
    Poster Session: 12th Annual Conference of Iscas. Conventional treatment of the subcondylar fractures of the mandible is challenging because of the medial and anterior displacement of the condylar fragment and the limited ...
  • A 3D virtual model for training in endoscopical repair of subcondylar fractures of the mandible 

    Hueto, J.A.; Díaz Iriberri, José; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Raspall, G. (2008-09)
    Article
    Accés restringit per política de l'editorial
    Conventional treatment of the subcondylar fractures of the mandible is challenging because of the medial and anterior displacement of the condylar fragment and the limited surgical field. Proximity of facial nerve, carotid ...
  • Abdominothoracic mechanisms of functional abdominal distension and correction by biofeedback 

    Barba, Elizabeth; Burri, Emanuel; Accarino Garaventa, Anna María; Cisternas, Daniel; Quiroga, Sergi; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Malagelada Benapres, Juan Ramon; Azpiroz Vidaur, Fernando (2015-04-01)
    Article
    Accés obert
    BACKGROUND & AIMS: In patients with functional gut disorders, abdominal distension has been associated with descent of the diaphragm and protrusion of the anterior abdominal wall. We investigated mechanisms of abdominal ...
  • Adaptive cross-sections of anatomical models 

    Díaz Iriberri, José; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau (North-Holland, 2012-09)
    Article
    Accés restringit per política de l'editorial
    Medical illustrations have been used for a long time for teaching and communicating information for diagnosis or surgery planning. Illustrative visualization systems create methods and tools that adapt traditional illustration ...
  • Adaptive transfer functions: improved multiresolution visualization of medical models 

    Díaz García, Jesús; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Pérez, Frederic; Vázquez Alcocer, Pere Pau (Springer, 2016-05-14)
    Article
    Accés obert
    Medical datasets are continuously increasing in size. Although larger models may be available for certain research purposes, in the common clinical practice the models are usually of up to 512x512x2000 voxels. These ...
  • A hybrid rugosity mesostructure (HRM) for faster rendering of fine haptic detail 

    Theoktisto, Víctor; Fairén González, Marta; Navazo Álvaro, Isabel (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We propose a faster method for surface haptic rendering using image-based Hybrid Rugosity Mesostructures (HRMs), paired maps with per-face height eld displacements and normalmaps, which are layered on top of a much decimated ...
  • A hybrid rugosity mesostructure (HRM) for rendering fine haptic detail 

    Theoktisto Colmenares, Victor Arturo; Fairén González, Marta; Navazo Álvaro, Isabel (2009-02)
    Report de recerca
    Accés obert
    The haptic rendering of surface mesostructure (fine relief features) in dense triangle meshes requires special structures, equipment, and high sampling rates for detailed perception of rugged models. Some approaches simulate ...
  • An experimental study on the effects of shading in 3D perception of volumetric models 

    Díaz Iriberri, José; Ropinski, Timo; Navazo Álvaro, Isabel; Gobbetti, Enrico; Vázquez Alcocer, Pere Pau (Springer, 2017-01)
    Article
    Accés restringit per política de l'editorial
    Throughout the years, many shading techniques have been developed to improve the conveying of information in volume visualization. Some of these methods, usually referred to as realistic, are supposed to provide better ...
  • An octree isosurface codification based on discrete planes 

    Boada, Imma; Navazo Álvaro, Isabel (2001)
    Text en actes de congrés
    Accés obert
    Describes a method to code a decimated model of an isosurface on an octree representation while maintaining volume data if it is needed. The proposed technique is based on grouping the marching cubes (MC) patterns into ...
  • 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)
    Report de recerca
    Accés obert
    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 generation of exploration paths for medical models 

    Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Herrero Jover, Javier; López, Jordi (2008)
    Article
    Accés obert
    Although the visualization techniques are becoming faster and faster, the datasets also increase, and the time the radiologists are able to devote to a single analysis is limited. In this sense, we propose some techniques ...
  • Automatic generation of exploration paths for medical models 

    Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Herrero, Javier; López, Jordi (Springer Verlag, 2008)
    Article
    Accés obert
    In Supplement 1. Proceedings of the 22nd International Congress and Exhibition, Barcelona, Spain, June 25-28, 2008. Category: Image Processing and Display
  • A Volume Visualization Algorithm using a coherent Extended Weight Matrix 

    Tost Pardell, Daniela; Puig Puig, Anna; Navazo Álvaro, Isabel (1995-01)
    Article
    Accés restringit per política de l'editorial
    Direct cell-to-cell volume visualization algorithms, also called projective rendering methods, present the advantage of allowing semi-transparencies and, additionally, as they project all the samples, they avoid the ...
  • Colonic content: effect of diet, meals, and defecation 

    Bendezú García, Álvaro; Mego, Marianela; Monclús Lahoya, Eva; Merino, Xavi; Accarino Garaventa, Anna María; Malagelada Benapres, Juan Ramon; Navazo Álvaro, Isabel; Azpiroz Vidaur, Fernando (2017-01-29)
    Article
    Accés obert
    The metabolic activity of colonic microbiota is influenced by diet; however, the relationship between metabolism and colonic content is not known. Our aim was to determine the effect of meals, defecation, and diet on colonic ...
  • Colonic content in health and its relation to functional gut symptoms 

    Bendezú García, Álvaro; Barba, Elisabeth; Burri, Emanuel; Cisternas, Daniel; Accarino Garaventa, Anna María; Quiroga, Sergi; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Malagelada Benapres, Juan Ramon; Azpiroz Vidaur, Fernando (2016-02-12)
    Article
    Accés obert
    Gut content may be determinant in the generation of digestive symptoms, particularly in patients with impaired gut function and hypersensitivity. Since the relation of intraluminal gas to symptoms is only partial, we ...
  • Computer graphics at the Universitat Politècnica de Catalunya 

    Brunet Crosa, Pere; Joan Arinyo, Robert; Navazo Álvaro, Isabel; Tost Pardell, Daniela; Vila, S (1995-06)
    Article
    Accés restringit per política de l'editorial
    This paper describes the authors experience in the organization and teaching of courses of Computer Graphics for both undergraduate and graduate students. Curriculum contents and teaching methodologies are discussed, taking ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Contenido colónico fisiológico medido por resonancia magnética 

    Bendezú, Álvaro; Merino, Xavi; Accarino Garaventa, Anna María; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Azpiroz Vidaur, Fernando (2014-03)
    Article
    Accés restringit per acord de confidencialitat