Now showing items 21-40 of 61

  • Detección automática de contornos en imágenes ecocardiográficas 

    Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Sallent Ribes, Sebastián; Torres Urgell, Lluís; Vidal Sans, Josep (Asociación Española de Reconocimiento de Formas y Análisis de Imágenes, 1988)
    Conference report
    Open Access
  • Elaboració de materials transversals per a l'aprenentatge actiu de les matèries de processat d'imatge i vídeo pels graus de sistemes audiovisuals i de telecomunicacions 

    Vilaplana Besler, Verónica; Casas Pla, Josep Ramon; Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Morros Rubió, Josep Ramon; Pardàs Feliu, Montse; Ruiz Hidalgo, Javier; Salembier Clairon, Philippe Jean (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
    Conference report / Conference lecture
    Open Access
    La finalitat del projecte ha estat promoure la col·laboració i coordinació entre les diverses assignatures de processat d'imatge i vídeo impartides per professors del Departament de TSC, als graus de telecomunicacions ...
  • Filtrado transversal adaptativo de varianza constante para la ecualización de canal 

    Vázquez Grau, Gregorio; Gasull Llampallas, Antoni; Sánchez Umbría, Juan; Oliveras Vergés, Albert (1989)
    Conference report
    Open Access
    This paper describes the problem of lineal filtering of noisy data under a Maximum Likelihood objective. In this sense, the paper shows that a weighted square error cost function deals and it is necessary to weight the ...
  • Image restoracion using the w-slice method 

    Sayrol Clols, Elisa; Chrysostomos, Nikias; Gasull Llampallas, Antoni (1995-08)
    Article
    Open Access
    We propose the use of higher order statistics (HOS)-based methods to address the problem of image restoration. The restoration strategy is based on the fact that the phase information of the original image and its HOS are ...
  • Image restoration using HOS and the Radon transform 

    Sayrol Clols, Elisa; Nikias, C L; Gasull Llampallas, Antoni (IEEE IEEE PRESS, 1993)
    Conference report
    Open Access
    The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...
  • Image restoration using HOS and the Radon transform 

    Sayrol Clols, Elisa; Chrysostomos, Nikias; Gasull Llampallas, Antoni (. IEEE, 1993)
    Conference report
    Open Access
    The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...
  • Improved ML cross-spectral estimation 

    Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni (1986)
    Conference report
    Open Access
    This work deals with the use of dedicated filters for cross-spectrum estimation. Basically, the ML cross-spectral estimator can be obtained as the natural extension of the Normalized Maximurn Likelihood procedure, reported ...
  • Interpolation and extrapolation of image partitions using Fourier descriptors: application to segmentation-based coding schemes 

    Marqués Acosta, Fernando; Llorens, Bernat; Gasull Llampallas, Antoni (. S.N., 1995)
    Conference report
    Open Access
    This paper presents an interpolation/extrapolation technique for sequence partitions. It consists of four steps: region parametrization, region interpolation, region ordering and partition creation. The evolution of each ...
  • Known Input Power Spectrum in Adaptive L.M.S. and A. G. Algorithms 

    Vázquez Grau, Gregorio; Gasull Llampallas, Antoni; Lagunas Hernandez, Miguel A. (1986)
    Conference report
    Open Access
    This work deals with the use of previous or colateral information to improve the behaviour of adaptive algorithms. The study is made on gradient-baseq methods due te the relatively simple and good performances that they ...
  • Known input power spectrum in adaptive L.M.S. and A.G. algorithms 

    Vázquez Grau, Gregorio; Gasull Llampallas, Antoni; Lagunas Hernandez, Miguel A. (1986)
    Conference report
    Open Access
    This work deals with the use of previous or colateral information to improve the behaviour of adaptive algorithms. The study is made on gradient-baseq methods due te the relatively simple and good performances that they ...
  • LaViCAD: Laboratorio Virtual de Comunicaciones Analógicas y Digitales 

    Cabrera-Bean, Margarita; Fernández Prades, Carles; Vargas Berzosa, Carlos; Vargas Berzosa, Francisco; Fernández Rubio, Juan Antonio; Gasull Llampallas, Antoni (Universitat de Barcelona. Edicions i Publicacions, 2006)
    Conference report
    Open Access
    En este trabajo se presenta tanto el diseño como la experimentación de un Laboratorio Virtual de Comunicaciones Analógicas y Digitales: LaViCAD. Mediante LaViCAD se pueden experimentar y verificar diferentes aplicaciones ...
  • LAVICAD: LAboratori VIrtual de Comunicacions Analògiques i Digitals 

    Cabrera-Bean, Margarita; Giró Nieto, Xavier; Rey Micolau, Francesc; Gasull Llampallas, Antoni; Casas, Josep; Villares Piera, Nemesio Javier; Fernández Rubio, Juan Antonio; Sala Álvarez, José; Espinosa Fricke, Pedro; Fernández, Carlos Marcos; Cortes, Silvia; Muntanyola, Mireia; Farré, Miquel Angel (2009-02-12T09:27:53Z)
    Conference lecture / Conference report
    Open Access
    Mitjançant el present ajut s’ha ampliat l’aplicació en xarxa LAVICAD (LAboratori VIrtual de COmunicacions Analògiques i Digitals) que s’ofereix de forma integrada dins de la plataforma d’e-learning COM@WEB. LAVICAD és ...
  • Matehematic morphology approach for renal biopsy analysis 

    Marqués Acosta, Fernando; Cuberas, Gemma; Gasull Llampallas, Antoni; Seron, Daniel; Moreso, Francesc; Joshi, Nayana (Institute of Electrical and Electronics Engineers (IEEE), 2004)
    Conference report
    Restricted access - publisher's policy
    This paper proposes a new technique for the analysis of renal biopsies stained with Sirius red and digitized under non-polarized light. The renal interstitial space, the cortex area and the tubules should be segmented to ...
  • Materials transversals per a l'aprenentatge actiu de les matèries de processat d'imatge i vídeo 

    Morros Rubió, Josep Ramon; Vilaplana Besler, Verónica; Ruiz Hidalgo, Javier; Casas Pla, Josep Ramon; Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Pardàs Feliu, Montse; Salembier Clairon, Philippe Jean (2014)
    Conference report
    Open Access
    Aquest treball vol promoure la col·laboració i coordinació entre assignatures de processat d'imatge/vídeo amb l’objectiu de potenciar els resultats en l'aprenentatge. Les principals contribucions son a) la creació d’un ...
  • Measuring true spectral density from ML filters (NMLM and q-NMLM spectral estimates) 

    Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1984)
    Conference report
    Open Access
    Starting from the classical procedure reported by Capon for power level estimation from ML filters, the authors present how this method can be modifyed in order to obtain a power spectral density estimate. The basic idea ...
  • Més enllà d’Atenea: un món per descobrir 

    Vallverdú Bayés, Sisco; Gasull Llampallas, Antoni (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-06-04)
    Conference lecture
    Open Access
    La organització de l'activitat docent de l'assignatura Senyals i Sistemes, amb 4 hores de teoria a la setmana i 1 de laboratori, es fonamenta, d'una banda, en una proposta formal recollida a Atenea, i de l'altre en la ...
  • Método MLNq para arrays de alta resolución 

    Gasull Llampallas, Antoni; Lagunas Hernandez, Miguel A.; Fernández Rubio, Juan Antonio; Moreno Bilbao, M. Asunción (Universidad de Sevilla, 1984)
    Conference report
    Open Access
    Spectral analysis techniques are used to bearing estimation problem. Each one of this gives a different array beamforming. We show here a generalized normalized Maximum Likehood Method which present a high resolution ...
  • Morphological detection based on size and contrast criteria. Application to cells detection 

    Salembier Clairon, Philippe Jean; Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Sayrol Clols, Elisa (. IEEE, 1992)
    Conference report
    Open Access
    This paper deals with a detection algorithm relying on size and contrast criteria. It is suitable for a large range of applications where a priori information about the size and the contrast of the objects to detect is ...
  • Motion estimation using higher-order statistics 

    Sayrol Clols, Elisa; Gasull Llampallas, Antoni; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-06-30)
    Article
    Open Access
    The objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics ...
  • Motion estimation using higher-order statistics 

    Sayrol Clols, Elisa; Gasull Llampallas, Antoni; Rodríguez Fonollosa, Javier (1996-06)
    Article
    Open Access
    The objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics is ...