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Ara es mostren els items 37-56 de 61

    • Mesh repair with user-friendly topology control 

      Hétroy, Franck; Rey, Stéphanie; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Vinacua Pla, Álvaro (Elsevier, 2011-01)
      Article
      Accés restringit per política de l'editorial
      Limitations of current 3D acquisition technology often lead to polygonal meshes exhibiting a number of geometrical and topological defects which prevent them from widespread use. In this paper we present a new method for ...

    • Monte Carlo convolution for learning on non-uniformly sampled point clouds 

      Hermosilla Casajús, Pedro; Ristchel, Tobias; Vázquez Alcocer, Pere Pau; Vinacua Pla, Álvaro; Ropinski, Timo (2018-11)
      Article
      Accés obert
      Deep learning systems extensively use convolution operations to process input data. Though convolution is clearly defined for structured data such as 2D images or 3D volumes, this is not true for other data types such as ...

    • Multiresolution for algebraic curves and surfaces using wavelets 

      Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (North Holland, 2001-01)
      Article
      Accés restringit per política de l'editorial
      This paper describes a multiresolution method for implicit curves and surfaces. The method is based on wavelets, and is able to simplify the topology. The implicit curves and surfaces are defined as the zero-valued piece-wise ...

    • Multiresolution for algebraic curves and surfaces using wavelets 

      Esteve Cusiné, Jordi; Brunet Crosa, Pere; Vinacua Pla, Álvaro (1998-11)
      Report de recerca
      Accés obert
      This paper describes a multiresolution method for implicit curves and surfaces. The method is based on wavelets, and is able to simplify the topology. The implicit curves and surfaces are defined as the zero-valued ...

    • Octree detection of closed compartments 

      Brunet Crosa, Pere; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (ACM Press, NY, 1991)
      Text en actes de congrés
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      The present paper addresses the problem of detecting closed compartments produced by a set of planar faces in the space. The topology of the set is general, and edges in the final piecewise planar surface can belong to ...

    • Omni-directional relief impostors 

      Andújar Gran, Carlos Antonio; Boo, J; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau; Vinacua Pla, Álvaro (North Holland, 2007-07)
      Article
      Accés restringit per política de l'editorial
      Relief impostors have been proposed as a compact and high-quality representation for high-frequency detail in 3D models. In this paper we propose an algorithm to represent a complex object through the combination of ...

    • Optimal iso-surfaces 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (2004-05)
      Article
      Accés obert
      Since the publication of the original Marching Cubes algorithm, numerous variations have been proposed for guaranteeing water-tight constructions of triangulated approximations of iso-surfaces. Most approaches divide the ...

    • Optimizing the topological and combinatorial complexity of isosurfaces 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Rossignac, Jarek; Vinacua Pla, Álvaro (Elsevier, 2005-07)
      Article
      Accés obert
      Since the publication of the original Marching Cubes algorithm, numerous variations have been proposed for guaranteeing water-tight constructions of triangulated approximations of isosurfaces. Most approaches divide the ...

    • Physics-based visual characterization of molecular interaction forces 

      Hermosilla, Pedro; Estrada, Jorge; Guallar, Víctor; Ropinski, Timo; Vinacua Pla, Álvaro; Vázquez Alcocer, Pere Pau (2017-01-01)
      Article
      Accés obert
      Molecular simulations are used in many areas of biotechnology, such as drug design and enzyme engineering. Despite the development of automatic computational protocols, analysis of molecular interactions is still a major ...

    • Piecewise algebraic surface computation and fairing from a discrete model 

      Esteve Cusiné, Jordi; Vinacua Pla, Álvaro; Brunet Crosa, Pere (2005-10)
      Report de recerca
      Accés obert
      This paper describes a constrained fairing method for implicit surfaces defined on a voxelization. This method is suitable for computing a closed smooth surface that approximates an initial set of face connected voxels.

    • Piecewise algebraic surface computation and smoothing from a discrete model 

      Esteve Cusiné, Jordi; Vinacua Pla, Álvaro; Brunet Crosa, Pere (2008-08)
      Article
      Accés obert
      This paper describes a contrained fairing method for implicit surfaces defined on a voxelization. This method is suitable for computing a closed smooth surface that approximates an initial set of face connected

    • Polylines, tubes and inflections. Some definitions, results and algorithms 

      Vivo Lorenzo, Manuel; Vinacua Pla, Álvaro (2000-03)
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      In this paper we discuss on planar polylines and their inflections. This work derives from our interest in the problem of the fairing modification of a polyline curve whose movement is constrained by some tolerance ...

    • Pressing: Smooth isosurfaces with flats from binary grids 

      Chica Calaf, Antonio; Williams, J.; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Rossignac, J.; Vinacua Pla, Álvaro (2006-02)
      Report de recerca
      Accés obert
      We explore the automatic recovery of solids from their volumetric discretizations. In particular, we propose an approach, called Pressing, for smoothing isosurfaces extracted from binary volumes while recovering their large ...

    • Reflector design from radiance distributions 

      Patow, Gustavo Ariel; Pueyo Sandez, Francesc Xavier; Vinacua Pla, Álvaro (Institute for Applied Mathematics and Information Technology, 2004-12)
      Article
      Accés restringit per política de l'editorial
      This paper proposes a technique for the design of reflector shapes from prescribed optical properties (far field radiance distribution) and geometrical constraints, which is of high importance in the field of Lighting ...

    • Registro 3D y 4D de imágenes cardíacas SPECT 

      Murillo, Santiago; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2007)
      Text en actes de congrés
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      Los estudios de cardiología nuclear provenientes de captaciones cardíacas 4D gated SPECT (Single Photon Emission Computed Tomographic) aportan información sobre la perfusión del ventrículo izquierdo en diferentes fases ...

    • Sistema avanzado de CAD Distribuido: integracion final del software 

      Brunet Crosa, Pere; Solano Albajés, Lluís; Monclús Lahoya, Eva; Fairén González, Marta; Vivo Lorenzo, Manuel; Vinacua Pla, Álvaro; Pueyo Sánchez, Xavier; Navazo Álvaro, Isabel; Joan Arinyo, Robert; Vázquez Alcocer, Pere Pau (1999-01-13)
      Report de recerca
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      El presente documento es un resumen de los resultados obtenidos en el marco del proyecto TIC95-0630. Proyecto conjunto entre la Universitat Politecnica de Catalunya y la Universidad de Girona. La integracion de los ...

    • Solid modelling for manufacturing: from Voelcker's boundary evaluation to discrete paradigms 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2022-11-01)
      Article
      Accés obert
      Herb Voelcker and his research team laid the foundations of Solid Modelling, on which Computer-Aided Design is based. He founded the ambitious Production Automation Project, that included Constructive Solid Geometry (CSG) ...

    • Surface fairing for ship hull design application. 

      Brunet Crosa, Pere; Vinacua Pla, Álvaro; Vivo Lorenzo, Manuel; Pla García, Núria; Rodríguez, A (1998-06)
      Report de recerca
      Accés obert
      This paper describes the design and implementation of a fairing module for a ship hull design application. This module is part of a large project on ship design, including facilities for piping, hull design and virtual ...

    • Sweep encoding: Serializing space subdivision schemes for optimal slicing 

      Comino Trinidad, Marc; Vinacua Pla, Álvaro; Carruesco Llorens, Àlex; Chica Calaf, Antonio; Brunet Crosa, Pere (Elsevier, 2022-05)
      Article
      Accés obert
      Slicing a model (computing thin slices of a geometric or volumetric model with a sweeping plane) is necessary for several applications ranging from 3D printing to medical imaging. This paper introduces a technique designed ...

    • Syntactic and semantic analysis for extended feedback on computer graphics assignments 

      Andújar Gran, Carlos Antonio; Vijulie, Cristina Raluca; Vinacua Pla, Álvaro (2020-05-01)
      Article
      Accés obert
      Modern computer graphics courses require students to complete assignments involving computer programming. The evaluation of student programs, either by the student (self-assessment) or by the instructors (grading) can take ...