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    • L'algorisme de visualització per partició binaria de l'espai 

      Brunet Crosa, Pere; Pascual Alsina, Joan; Vila, R. (1989)
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      Accés obert
      This work presents the Binary Space Partition algorithm for the visualization of polyedric scenes (BSP algorithm, Fuchs 1980). It also includes the criteria for the election of the root face. The complexity of the involved ...

    • La interpolació amb funcions spline: introducció automàtica de les condicions d’extrem 

      Brunet Crosa, Pere (Universitat Politècnica de Barcelona. Centre de Càlcul, 1982-12)
      Article
      Accés obert
      Los algoritmos de interpolación por splines cúbicas, ampliamente utilizados en campos que van desde el diseño gráfico hasta el tratamiento de datos experimentales, requieren siempre el conocimiento de dos condiciones de ...

    • La realidad virtual en el aprendizaje de historia mediante la interacción con humanoides virtuales 

      Muñoz, Albert; Besora Vilardaga, Isaac; Creus López, Carles; Pelechano Gómez, Núria; Brunet Crosa, Pere; Beacco Porres, Alejandro (2009)
      Text en actes de congrés
      Accés obert
      La realidad virtual ofrece la posibilidad de interactuar de manera inmersiva en mundos virtuales 3D. Estos mundos virtuales pueden ser representaciones de otros momentos históricos que permiten al usuario explorar los ...

    • Línies de recerca que es desenvolupen a la càtedra de mètodes informàtics de l´ETSEIB 

      Brunet Crosa, Pere (Universitat Politècnica de Barcelona, 1980-12)
      Text en actes de congrés
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      En aquesta comunicació es presenten les línies de re­cerca actuals de la Càtedra. Per una banda s'est! tre­ballant en temes relacionats amb el calcul mitjançant ordinador, temes que considerem que són d'interès en un entorn ...

    • MDCO to B-Rep conversion algorithm 

      Ayala Vallespí, M. Dolors; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere (1995-07)
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      Spatial enumeration models are widely used in several fields. These models are approximate but the major disadvantage is the lack of concision. In order to avoid such verbosity, hierarchical encodings such as octrees have ...

    • 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 ...

    • Methods' analysis for generating octree models of objects from their silhouettes 

      Franquesa Niubó, Marta; Brunet Crosa, Pere (1996-07-29)
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      Accés obert
      Reconstructing 3D models from their projection images has been an interesting research topic in computer vision and geometric modeling. In this paper, we review methods that generate octree models of objects from their ...

    • MiniVR: a portable virtual reality system 

      Fairén González, Marta; Brunet Crosa, Pere; Techmann, Torsten (2004-04)
      Article
      Accés restringit per política de l'editorial
      This paper describes a new virtual reality system designed to be small enough to be totally portable. It is a semiimmersive interaction system based on a movable stereoscopic projection screen with a tracking system to ...

    • MKtree: generation and simulations 

      Franquesa Niubó, Marta; Brunet Crosa, Pere (2002-01)
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      Accés obert
      The problem to represent very complex systems has been studied by several authors, obtaining solutions based on different data structures. In this paper, a K dimensional tree (Multirresolution Kdtree, ...

    • MKtrees: construction and applications 

      Franquesa Niubó, Marta; Brunet Crosa, Pere (2003-07)
      Report de recerca
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      In this report, a new $ dimensional tree data structure ({emph Multiresolution Kdtree, MKtree}) is introduced. In a complex scene containing a high number of individual objects, the MKtree represents a ...

    • Modelatge geomètric de sòlids polièdrics sobre microcomputador 

      Giralt Adroher, Josep; Torres, E.; Brunet Crosa, Pere (Marcombo, 1987)
      Text en actes de congrés
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      El present article descriu una adaptació per a microcomputadors del sistema de modela DMI, discutint les prestacions del model i de les principals operacions associades. Es presentaran les característiques fonalmentals del ...

    • Modelización y filtrado de secuencias de imágenes perturbadas por ruido blanco gaussiano 

      Basañez Villaluenga, Luis; Brunet Crosa, Pere (Asociación Española de Informática y Automática (AEIA), 1979)
      Text en actes de congrés
      Accés obert
      La restauración de imágenes perturbadas por ruido constituye un tema de gran interés y actualidad por su amplio campo de aplicaciones en áreas que van desde la bioingeniería hasta la robótica industrial. Para la ...

    • Multiresolution approximation of polyhedral solids 

      Ayala Vallespí, M. Dolors; Brunet Crosa, Pere; Joan Arinyo, Robert; Navazo Álvaro, Isabel (1996-06)
      Report de recerca
      Accés obert
      Multiresolution models with different levels of detail are a basic tool for handling very large and complex systems in computer aided design applications such as ship design. In this work, we discuss several automatic ...

    • 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 ...

    • Multiscale acquisition and presentation of very large artifacts: The case of Portalada [Ripoll Monastery, Spain] 

      Brunet Crosa, Pere; Callieri, Marco; Chica Calaf, Antonio; Dellepiane, Matteo; Besora Vilardaga, Isaac; Corsini, Massimiliano; Moyés, Jordi; Ranzuglia, Guido; Scopigno, Roberto (2011-04)
      Article
      Accés restringit per política de l'editorial
      The dichotomy between full detail representation and the efficient management of data digitization is still a big issue in the context of the acquisition and visualization of 3D objects, especially in the field of the ...

    • Navigation in highly polygon-populated ship environments using the visibility octree 

      Saona Vázquez, Carlos Luis; Navazo Álvaro, Isabel; Brunet Crosa, Pere (2000-01)
      Report de recerca
      Accés obert
      This work is focused on the interactive navigation through highly polygon-populated ship environments. A conservative visibility algorithm is presented that hierarchically computes visibility for different observer ...

    • Non-homogeneous solid modeling with octrees. A geological application 

      Puig Puig, Anna; Navazo Álvaro, Isabel; Brunet Crosa, Pere (1993-03)
      Report de recerca
      Accés obert
      From an historical point of view, geometric modeling techniques usually represent the surface of solids. However, the increasing development of new fields in CAD applications like molecular systems, medicine, or geology, ...

    • Object representation by means of nonminimal division quadtrees and octrees 

      Ayala Vallespí, M. Dolors; Brunet Crosa, Pere; Juan, R.; Navazo Álvaro, Isabel (1985-01)
      Article
      Accés restringit per política de l'editorial
      Quadtree representation of two-dimensional objects is performed with a tree that describes the recursive subdivision of the more complex parts of a picture until the desired resolution is reached. At the end, all the leaves ...

    • Octree detection of closed compartments 

      Brunet Crosa, Pere; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (ACM Press, NY, 1991)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...