Recent Submissions

  • A belief-based decision-making framework for spectrum selection in cognitive radio networks 

    Pérez Romero, Jordi; Raschellà, Alessandro; Sallent Roig, José Oriol; Umbert Juliana, Anna (2015-12-17)
    Article
    Open Access
    This paper presents a comprehensive cognitive management framework for spectrum selection in cognitive radio networks. The framework uses a belief vector concept as a means to predict the interference affecting the different ...
  • CEMs and Faraday rotation study of ¿-Fe2O3- Fe3O4films obtained by a new pyrolisis technique 

    Cusidó Fàbregas, Joan Antoni; Obradors Berenguer, Xavier; Fontcuberta, Josep; Isalgue Buxeda, Antonio; Canal Bienzobas, Fernando; Joubert, Jean C.; Langlet, M. (1987-01)
    Article
    Open Access
    Thin film iron oxides prepared by a new pyrolisis technique are studied by means of CEM spectroscopy and Faraday rotation measurements. It is shown that Fe3O4spinel oxides are obtained when the deposition is performed under ...
  • Implementation of cognitive radio networks to evaluate spectrum management strategies in real-time 

    Raschellà, Alessandro; Umbert Juliana, Anna (2016-04-01)
    Article
    Restricted access - publisher's policy
    This paper illustrates a Universal Software Radio Peripheral (USRP)-based real-time testbed that is able to evaluate different spectrum management solutions that exploit the Cognitive Radio (CR) paradigm. The main objective ...
  • Antipodally invariant metrics for fast regression-based super-resolution 

    Pérez-Pellitero, Eduardo; Salvador, Jordi; Ruiz Hidalgo, Javier; Rosenhahn, Bodo (2016-03-31)
    Article
    Open Access
    Dictionary-based super-resolution (SR) algorithms usually select dictionary atoms based on the distance or similarity metrics. Although the optimal selection of the nearest neighbors is of central importance for such ...
  • A contour-based approach to binary shape coding using a multiple grid chain code 

    Nunes, P; Marqués Acosta, Fernando; Pereira, F; Gasull Llampallas, Antoni (2000-05)
    Article
    Open Access
    This paper presents a contour-based approach to efficiently code binary shape information in the context of object-based video coding. This approach meets some of the most important requirements identified for the MPEG-4 ...
  • Region-based representations of image and video: segmentation tools for multimedia services 

    Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando (1999-12)
    Article
    Open Access
    This paper discusses region-based representations of image and video that are useful for multimedia services such as those supported by the MPEG-4 and MPEG-7 standards. Classical tools related to the generation of the ...
  • Prediction of image partitions using Fourier descriptors: application to segmentation-based coding schemes 

    Marqués Truyol, Francisco; Gasull Llampallas, Antoni (1998-04)
    Article
    Open Access
    This paper presents a prediction technique for partition sequences. It uses a region-by-region approach that consists of four steps: region parameterization, region prediction, region ordering, and partition creation. The ...
  • Segmentation of video sequences and rate control 

    Marcotegui Iturmendi, Beatriz; Marqués Acosta, Fernando; Morros Rubió, Josep Ramon; Pardàs Feliu, Montse; Salembier Clairon, Philippe Jean (1997-08)
    Article
    Open Access
    This paper deals with the relation between segmentation for coding and rate control. The efficiency of a segmentation-based coding scheme heavily relies on this step that defines how many and which regions have to be ...
  • Segmentation-based video coding system allowing the manipulation of objects 

    Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando; Pardàs Feliu, Montse; Morros Rubió, Josep Ramon; Corset, I; Jeannin, S; Bouchard, L; Meyer, F; Marcotegui Iturmendi, Beatriz (1997-02)
    Article
    Open Access
    This paper presents a generic video coding algorithm allowing the content-based manipulation of objects. This manipulation is possible thanks to the definition of a spatiotemporal segmentation of the sequences. The coding ...
  • Allowing content-based functionalities in segmentation-based coding schemes 

    Marcotegui Iturmendi, Beatriz; Marqués Acosta, Fernando; Meyer, F (1997-08)
    Article
    Open Access
    This paper deals with the use of the segmentation tools and principles presented in [10] and [13] for allowing content-based functionalities. In this framework, means for supervised selection of objects in the scene are ...

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