Enviaments recents

  • Un modelo para diseñar actividades de aprendizaje en la enseñanza de ingenierías 

    Otero Calviño, Beatriz; Rodríguez Luna, Eva (Red Estatal de Docencia Universitaria, 2016-11-01)
    Article
    Accés obert
    En los actuales momentos nuestros estudiantes se encuentran bastante desmotivados a la hora de asistir a clase y de trabajar. Esto conduce a que sea necesario que el profesor introduzca cambios en sus clases que lo lleven ...
  • Criterios para practicas de evaluación de calidad 

    Cadenato, Ana; Martínez Martínez, María del Rosario; Gallego Fernández, María Isabel; Amante García, Beatriz; Jordana Barnils, José; Farrerons Vidal, Óscar; Isalgue Buxeda, Antonio; Fabregat Fillet, Jaume (2012-07-31)
    Article
    Accés obert
    El grupo de innovación GRAPA ( GRupo de la Evaluación de la Práctica Académica ) d el proyecto RIMA de la Universitat Politècnica de Catalunya ha elaborado una serie de criterios , en forma de rúbrica, como buenas prácticas ...
  • Efficient coding of homogeneous textures using stochastic vector quantization and linear prediction 

    Gimeno, D; Torres Urgell, Lluís (1999-06)
    Article
    Accés obert
    Vector quantisation (VQ) has been extensively used as an effective image coding technique. One of the most important steps in the whole process is the design of the codebook. The codebook is generally designed using the ...
  • Analysis and synthesis of textures through the inference of Boolean functions 

    Domínguez Pumar, Manuel; Torres Urgell, Lluís (1997-05)
    Article
    Accés restringit per política de l'editorial
    This work deals with Boolean functions of non-linear and linear basis. The Boolean random functions of non-linear basis were proposed by Serra (1988,1989). These functions are generated through a Poisson point process upon ...
  • A region-based subband coding scheme 

    Casas Pla, Josep Ramon; Torres Urgell, Lluís (1997-07)
    Article
    Accés restringit per política de l'editorial
    This paper describes a region-based subband coding scheme intended for efficient representation of the visual information contained in image regions of arbitrary shape. QMF filters are separately applied inside each region ...
  • Stochastic vector quantization of images 

    Torres Urgell, Lluís; Casas Pla, Josep Ramon; Arias, E (1997-11)
    Article
    Accés restringit per política de l'editorial
    One of the most important steps in the vector quantization of images is the design of the codebook. The codebook is generally designed using the LBG algorithm, that is in essence a clustering algorithm which uses a large ...
  • Region-based video coding using mathematical morphology 

    Salembier Clairon, Philippe Jean; Torres Urgell, Lluís; Meyer, F; Gu, C (1995-06)
    Article
    Accés obert
    This paper presents a region-based coding algorithm for video sequences. The coding approach involves a time-recursive segmentation relying on the pixels homogeneity, a region-based motion estimation, and motion compensated ...
  • An improvement on codebook search for vector quantization 

    Torres Urgell, Lluís; Huguet, J (1994-02)
    Article
    Accés obert
    Presents a simple but effective algorithm to speed up the codebook search in a vector quantization scheme when a MSE criterion is used. A considerable reduction in the number of operations is achieved. This algorithm was ...
  • Coding of details in very low bit-rate video systems 

    Casas Pla, Josep Ramon; Torres Urgell, Lluís (1994-06)
    Article
    Accés obert
    In this paper, the importance of including small image features at the initial levels of a progressive second generation video coding scheme is presented. It is shown that a number of meaningful small features called details ...
  • SURF-based mammalian species identification system 

    Otero Calviño, Beatriz; Rodríguez Luna, Eva; Ventura Queija, Jacint (2016-05-31)
    Article
    Accés restringit per política de l'editorial
    The development of tools for the automated identification of species will reduce the burden of routine identifications conducted by many biologists. The design of these tools is difficult because it depends on the proper ...

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