Now showing items 1-13 of 13

  • A comparative study between Elliptic Fourier and B-spline descriptors for object contour representation 

    Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç; Soria Pérez, José Antonio; Nasreddine, Kamal; Benzinou, Abdesslam (2014)
    Conference report
    Restricted access - publisher's policy
    In this work, a comparative study between Elliptic Fourier and B-spline descriptors is carried out for comparing their efficiency in characterizing the contour shape of image objects. In both cases, the goal is to obtain ...
  • Decimator filter based on B-splines 

    Ferrer Arnau, Luis Jorge; Roset Juan, Francesc Xavier; Mon González, Juan; Parisi Baradad, Vicenç (2013)
    Conference report
    Open Access
    The cascaded integrator-comb (CIC) filters are widely used as decimators in many applications, such as in delta sigma AD converters to decimate the sampled signal on its output. One problem with these filters is that by ...
  • Divertimento con wavelets 

    Ferrer Arnau, Luis Jorge (Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica (EEL), 2009)
    Conference report
    Open Access
    En este trabajo se presenta una pequeña introducción a las wavelets. Estas se interpretan com otra forma de mirar la inormación, formada por diferentes niveles o capas. En concreto se pone el ejemplo de una wavelet basada ...
  • Effects of nonidealities in switching frequency modulation techniques:application to Coupled Interleaved Multicellular Parallel converters 

    Mon González, Juan; González Díez, David; Ferrer Arnau, Luis Jorge; Labrousse, Denis; Costa, François (2013)
    Conference report
    Open Access
    This paper explores the application of the Variable Delay Frequency Modulation (VDFM) to an Interleaved Multicellular Parallel converter. VDFM is a modulation technique specially intended to reduce conducted EMI generated ...
  • Efficient cubic spline interpolation implemented with FIR filters 

    Ferrer Arnau, Luis Jorge; Reig Bolano, Ramon; Marti Puig, Pere; Manjabacas, A.; Parisi Baradad, Vicenç (2012-06-26)
    Article
    Open Access
    Classical Cubic spline interpolation needs to solve a set of equations of high dimension. In this work we show how to compute the interpolant using a FIR digital filter, with a reduced number of operations per interpolated ...
  • Efficient implementation with FIR filters of operators based on B-splines to represent and classify signals of one and two dimensions 

    Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç (2012)
    Conference lecture
    Open Access
  • Efficient representation of contours using splines implemented with FIR filters 

    Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç; Reig Bolano, Ramon; Marti Puig, Pere; Manjabacas, A. (2011)
    Conference report
    Restricted access - publisher's policy
    The interpolation of contour pixels, with splines, of an order greater than or equal to two, usually causes oscillations that do not fit the original shape. To overcome this we propose using a least squares filter before ...
  • Feature selection for analyzing and retrieving fish otoliths using elliptic Fourier descriptors of shapes 

    Reig Bolano, Ramon; Marti Puig, Pere; Gallego, Esteve; Masferrer, Gerard; Lombarte, A.; Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç (2011)
    Conference report
    Restricted access - publisher's policy
    This paper analyzes the characteristics of an experimental otolith retrieval system based on image contours described with Elliptical Fourier Descriptors (EFD). Otoliths are found in the inner ear of fish. Their shape ...
  • Introducción a la compatibilidad electromagnética 

    Ferrer Arnau, Luis Jorge (2002)
    Conference report
    Open Access
    El objetivo de este trabajo es hacer una pequeña introducción a la compatibilidad electromagnética. Este es un tema que en mi opinión se trata poco o nada dentro de los temarios de las titulaciones técnicas y en cambio ...
  • Operators to calculate the derivative of digital signals 

    Ferrer Arnau, Luis Jorge; Mon González, Juan; Parisi Baradad, Vicenç (2013)
    Conference lecture
    Open Access
    This paper presents an FIR operator with a very low computational cost for calculating the first derivative of discrete band-limited signals. The basic idea is to use cubic spline polynomials for interpolating among the ...
  • Otolith shape classification for fish stock discrimination 

    Soria Pérez, José Antonio; Nasreddine, Kamal; Parisi Baradad, Vicenç; Ferrer Arnau, Luis Jorge; Benzinou, Abdesslam (2014)
    Conference report
    Restricted access - publisher's policy
    The shape analysis of otoliths, which are calcified structures in the inner ear of teleostean fishes, is known to be particularly relevant to address species identification and stock discrimination. Generally, scientists ...
  • Potenciació de l’ús dels recursos del campus ATENEA per a l’autoaprenentatge i el suport a la docència en les assignatures de circuits i dispositius electrònics 

    Fernández García, Raúl; Gil Galí, Ignacio; Ferrer Arnau, Luis Jorge; Gago Barrio, Javier; Berbel Artal, Néstor (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
    Conference report / Conference lecture
    Open Access
    Tradicionalment, les assignatures relacionades amb l’anàlisi de circuits i dispositius electrònics son assignatures que presenten un baix rendiment acadèmic en comparació a d’altres. Es a dir, el percentatge d’alumnes ...
  • Surface parameterization for smooth 3D shapes 

    Marti Puig, Pere; Reig Bolano, Ramon; Manjabacas, A.; Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç; Lombarte, A. (2011)
    Conference report
    Restricted access - publisher's policy
    In this work we present a new method for compacting data from 3D shapes by extracting a 3D characteristic curve that we call a 3D signature. The 3D signature obtained preserves almost all the morphological shape ...