Ara es mostren els items 1-20 de 34

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...
    • A contour based approach for bilateral mammogram registration using discrete wavelet analysis 

      Reig Bolano, Ramon; Parisi Baradad, Vicenç; Marti Puig, Pere (2009)
      Article
      Accés restringit per política de l'editorial
      Registration of mammograms is an essential step to increase the effectiveness of all screening programs planned to early detect breast cancer in asymptomatic women. New techniques based on data fusion of different spatial ...
    • A model-based expansion on interpolation for multiresolution sparse data 

      Reig Bolaño, Ramon; Parisi Baradad, Vicenç; García-Ladona, Emilio; Martí Puig, Pere (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2008-04-08T14:18:41Z)
      Article
      Accés obert
      This paper addresses the interpolation of sparse irregular data when these sparse data belong to diff erent scales. We propose an algorithm to iteratively approximate the intermediate values between irregularly sampled ...
    • A new otolith image contour descriptor based on partial reflection 

      Reig Bolano, Ramon; Marti Puig, Pere; Lombarte, A.; Soria Pérez, José Antonio; Parisi Baradad, Vicenç (2010-12)
      Article
      Accés restringit per política de l'editorial
      In this paper we propose a new contour descriptor for reconstructing fish otolith contours that uses half the number of coefficients needed by the classical elliptical Fourier descriptors (EFDs) for the same accuracy. ...
    • A recursive approach to multiscalar data interpolation of sparsely sampled sea surface measurements at different spatial resolutions 

      Reig Bolano, Ramon; Garcia Ladona, E.; Parisi Baradad, Vicenç; Marti Puig, Pere (2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In many oceanographic studies there is a need to reconstruct a signal from a set of sparse measurements. We propose an algorithm to iteratively approximate the intermediate values between irregularly sampled data, when ...
    • Automated taxon identification of teleost fishes using an otolith online database-AFORO 

      Parisi Baradad, Vicenç; Manjabacas, A.; Lombarte, A.; Olivella, R.; Chic, Oscar; Piera, Jaume; Garcia Ladona, E. (2010-06)
      Article
      Accés restringit per política de l'editorial
      Automated Taxon Identification (ATI) systems that use a database to identify species or anatomical structures of species from different taxonomical groups have recently been developed. However, few of these works have ...
    • Best-basis development towards the automatical detection of otolith irregularities in fishes 

      Soria Pérez, José Antonio; Parisi Baradad, Vicenç (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The application of feature extraction methodologies and the detection of patterns in sagitae otoliths, which are calcified structures in the inner ear of teleostean fishes, has lead to great knowledge of marine biology ...
    • Coding of biosignals using the discrete wavelet decomposition 

      Reig Bolano, Ramon; Marti Puig, Pere; Solé-Casals, Jordi; Zaiats, Vladimir; Parisi Baradad, Vicenç (Springer, 2009)
      Text en actes de congrés
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      Wavelet derived codification techniques are widespread used in image codifiers. The wavelet based compression methods are adequate for representing transients. In this paper we explore the use of the discrete wavelet transform ...
    • Data acquisition system for volcanic seismic 

      Carreras Pons, Normandino; Gomáriz Castro, Spartacus; Parisi Baradad, Vicenç; Río Fernandez, Joaquín del (Antoni Mànuel, 2012-12-01)
      Comunicació de congrés
      Accés obert
      This paper presents a design that is being created for the acquisition of volcanic seismic data. This system is composed by a microcontroller to management the peripherals, a module to acquire the information of seismic ...
    • Data acquisition system for volcanic seismic 

      Carreras Pons, Normandino; Gomáriz Castro, Spartacus; Parisi Baradad, Vicenç; Río Fernandez, Joaquín del (SARTI Technological Development Centre of Remote Acquisition and Data processing Systems, 2012)
      Article
      Accés obert
      This paper presents a design that is being created for the acquisition of volcanic seismic data. This system is composed by a microcontroller to management the peripherals, a module to acquire the information of ...
    • Data compression of natural signals based on discrete wavelet transform analysis 

      Reig Bolano, Ramon; Marti Puig, Pere; Solé-Casals, Jordi; Parisi Baradad, Vicenç (2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper we explore the use of the discrete wavelet transform analysis of an arbitrary signal in order to improve the data compression capability of data coders. Wavelet analysis is widespread used in image codifiers, ...
    • Decimator filter based on B-splines 

      Ferrer Arnau, Luis Jorge; Roset Juan, Francesc Xavier; Parisi Baradad, Vicenç (SARTI, 2013)
      Article
      Accés obert
    • Decimator filter based on B-splines 

      Ferrer Arnau, Luis Jorge; Roset Juan, Francesc Xavier; Mon González, Juan; Parisi Baradad, Vicenç (2013)
      Text en actes de congrés
      Accés obert
      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 ...
    • Density Local Discriminant Bases for the analysis of otolith morphology in fish identification applications 

      Soria Pérez, José Antonio; Parisi Baradad, Vicenç; Lombarte, A. (Centre de Publicacions del Campus Nord SCCL (CPET), 2010)
      Text en actes de congrés
      Accés obert
    • 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
      Accés obert
      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)
      Comunicació de congrés
      Accés obert
    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...
    • ELECTRONICA INDUSTRIAL 2 (Examen 1r Quadr.) 

      Parisi Baradad, Vicenç (Universitat Politècnica de Catalunya, 1998-12-31)
      Examen
      Accés restringit a la comunitat UPC
    • ELECTRONICA INDUSTRIAL 2 (Examen 1r Quadr.) 

      Parisi Baradad, Vicenç (Universitat Politècnica de Catalunya, 1998-12-31)
      Examen
      Accés restringit a la comunitat UPC
    • ELECTRONICA INDUSTRIAL 2 (Examen 1r Quadr.) 

      Parisi Baradad, Vicenç (Universitat Politècnica de Catalunya, 1998-12-31)
      Examen
      Accés restringit a la comunitat UPC