Exploració per tema "Otoliths"

Ara es mostren els items 1-10 de 10

    • 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. ...

    • 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 ...

    • 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)
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      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 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 ...

    • 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)
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      Accés restringit per política de l'editorial
      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 ...

    • Otolith shape classification for fish stock discrimination 

      Soria Pérez, José Antonio; Nasreddine, Kamal; Parisi Baradad, Vicenç; Ferrer Arnau, Luis Jorge; Benzinou, Abdesslam (2014)
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      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 ...

    • Otoliths identifiers using image contours EFD 

      Reig Bolano, Ramon; Marti Puig, Pere; Rodríguez González, Sara; Bajo Pérez, Javier; Parisi Baradad, Vicenç; Lombarte, A. (Springer Berlín / Heidelberg, 2010-09)
      Article
      Accés restringit per política de l'editorial
      In this paper we analyze the characteristics of an experimental otolith identification system based on image contours described with Elliptical Fourier Descriptors (EFD). Otoliths are found in the inner ear of fishes. ...

    • Surface parameterization for smooth 3D shapes 

      Marti Puig, Pere; Reig Bolano, Ramon; Manjabacas, A.; Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç; Lombarte, A. (2011)
      Text en actes de congrés
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      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 ...