Ara es mostren els items 31-45 de 45

    • Portalada: a virtual reconstruction of the entrance of the Ripoll Monastery 

      Scopigno, Roberto; Ranzuglia, Guido; Besora Vilardaga, Isaac; Brunet Crosa, Pere; Callieri, Marco; Chica Calaf, Antonio; Corsini, Massimiliano; Dellepiane, Matteo; Morales, Daniel; Moyés, Jordi (Stephan Gumhold, Jana Kosecka and Oliver Staadt, 2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The dichotomy between detail representation and data management is still a big issue in the context of the acquisition and visualization of 3D objects, especially in the field of Cultural Heritage. New technologies give ...
    • 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 ...
    • Real-time exploration of the virtual reconstruction of the entrance of the Ripoll Monastery 

      Besora Vilardaga, Isaac; Brunet Crosa, Pere; Chica Calaf, Antonio; Morales, Daniel; Moyés, Jordi (Eurographics association, 2008-09-30)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents the project of the virtual reconstruction and inspection of the "Portalada", the entrance of the Ripoll Monastery. In a first step, the monument of 7 x 11 meters was acquired using triangulation laser ...
    • Real-time rendering and physics of complex dynamic terrains modeled as CSG trees of DEMs carved with spheres 

      Alonso Alonso, Jesús; Joan Arinyo, Robert; Chica Calaf, Antonio (Elsevier, 2023-08)
      Article
      Accés obert
      We present a novel proposal for modeling complex dynamic terrains that offers real-time rendering, dynamic updates and physical interaction of entities simultaneously. We can capture any feature from landscapes including ...
    • Segmentation of aerial images for plausible detail synthesis 

      Argudo Medrano, Óscar; Comino Trinidad, Marc; Chica Calaf, Antonio; Andújar Gran, Carlos Antonio; Lumbreras, Felipe (2018-04-01)
      Capítol de llibre
      Accés obert
      The visual enrichment of digital terrain models with plausible synthetic detail requires the segmentation of aerial images into a suitable collection of categories. In this paper we present a complete pipeline for segmenting ...
    • Sensor-aware normal estimation for point clouds from 3D range scans 

      Comino Trinidad, Marc; Andújar Gran, Carlos Antonio; Chica Calaf, Antonio; Brunet Crossa, Pere (2018)
      Article
      Accés restringit per política de l'editorial
      Normal vectors are essential for many point cloud operations, including segmentation, reconstruction and rendering. The robust estimation of normal vectors from 3D range scans is a challenging task due to undersampling and ...
    • Single-picture reconstruction and rendering of trees for plausible vegetation synthesis 

      Argudo Medrano, Óscar; Chica Calaf, Antonio; Andújar Gran, Carlos Antonio (2016-06-01)
      Article
      Accés obert
      State-of-the-art approaches for tree reconstruction either put limiting constraints on the input side (requiring multiple photographs, a scanned point cloud or intensive user input) or provide a representation only suitable ...
    • 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) ...
    • 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 ...
    • Terrain super-resolution through aerial imagery and fully convolutional networks 

      Argudo Medrano, Óscar; Chica Calaf, Antonio; Andújar Gran, Carlos Antonio (2018-05-22)
      Article
      Accés restringit per política de l'editorial
      Despite recent advances in surveying techniques, publicly available Digital Elevation Models (DEMs) of terrains are low-resolution except for selected places on Earth. In this paper we present a new method to turn ...
    • Tree variations 

      Argudo Medrano, Óscar; Andújar Gran, Carlos Antonio; Chica Calaf, Antonio (2017)
      Text en actes de congrés
      Accés obert
      The cost-effective generation of realistic vegetation is still a challenging topic in computer graphics. The simplest representation of a tree consists of a single texture-mapped billboard. Although a tree billboard does ...
    • Triangle influence supersets for fast distance computation 

      Pujol Puig, Eduard; Chica Calaf, Antonio (John Wiley & sons, 2023-09)
      Article
      Accés obert
      We present an acceleration structure to efficiently query the Signed Distance Field (SDF) of volumes represented by trianglemeshes. The method is based on a discretization of space. In each node, we store the triangles ...
    • View-dependent hierarchical rendering of massive point clouds through textured splats 

      Comino Trinidad, Marc; Chica Calaf, Antonio; Andújar Gran, Carlos Antonio (European Association for Computer Graphics (Eurographics), 2019)
      Text en actes de congrés
      Accés obert
      Nowadays, there are multiple available range scanning technologies which can capture extremely detailed models of realworld surfaces. The result of such process is usually a set of point clouds which can contain billions ...
    • Visibility-based feature extraction from discrete models 

      Chica Calaf, Antonio (ACM Press. Association for Computing Machinery, 2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we present a new visibility-based feature extraction algorithm from discrete models as dense point clouds resulting from laser scans. Based on the observation that one can characterize local properties of ...
    • Visualization of large-scale urban models through multi-level relief impostors 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Chica Calaf, Antonio; Navazo Álvaro, Isabel (North Holland, 2010-12)
      Article
      Accés restringit per política de l'editorial
      In this paper, we present an efficient approach for the interactive rendering of large-scale urban models, which can be integrated seamlessly with virtual globe applications. Our scheme fills the gap between standard ...