Now showing items 1-20 of 62

    • 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 ...
    • Actividades en procesado de la imagen del Grupo de Procesado de Señal 

      Marqués Acosta, Fernando; Gasull Llampallas, Antoni; Torres Urgell, Lluís (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
      Article
      Open Access
    • Algoritmo para la estimación óptima de la fase instantánea 

      Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni; Figueiras Vidal, Aníbal R.; Carol Vilanova, Antonio (1980)
      Conference report
      Open Access
      A new approach in the problem of phase detectors is presented. The procedure is started from the optimum design of digital phase locked loop (DPLL) and some fundamental aspects as the state equations for the communication ...
    • An adaptive spectral estimator based on the predictive innovation process and Kalman filtering 

      Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Gasull Llampallas, Antoni; García Gómez, Ramón (1980)
      Conference report
      Open Access
    • An improved maximum likelihood method for power spectral density estimation 

      Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni (1984-02)
      Article
      Open Access
    • Análisis de no estacionariedades en la interpolación de imágenes. Aplicación a codificación piramidal y zoom 

      Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Torres Urgell, Lluís (1991)
      Conference report
      Open Access
      In some applications of digital image processing the fact that an image is a non estacionary signal can cause some undesirable effects. That is the case of block effect in transform coding, or destructive effects on contours ...
    • Análisis espectral de series meteorológicas 

      Nadeu Camprubí, Climent; Gasull Llampallas, Antoni; Figueiras Vidal, Aníbal R. (1981)
      Conference report
      Open Access
    • Aplicación del algoritmo de Kalman al estudio de la ritmicidad ultradiana en el comportamiento expontáneo de sujetos humanos aislados 

      Carol Vilanova, Antonio; Gasull Llampallas, Antoni; Lagunas Hernandez, Miguel A. (E.T.S.I.I.T, 1981)
      Conference report
      Open Access
      Este trabajo explora la posible existencia de ritmos ultradianos (período comprendido entre 30 minutos y 20 horas) en el comportamiento espontáneo vigil del hombre, analizando espectralmente las señales con el filtra ...
    • Automatic left ventricular contour extraction for volume calculation from echocardiographic images 

      Gasull Llampallas, Antoni; Torres Urgell, Lluís; Marqués Acosta, Fernando; Vázquez Grau, Gregorio (1989)
      Conference report
      Open Access
      This paper presents a new fully automated algorithm that extracts LV epicardial and endocardial borders from 2-D echocardiograms. The method is based on a radial search approach, which is the best way to use some a priori ...
    • Bit-slice implementation of a linear predictive vocoder 

      Vázquez Grau, Gregorio; Gasull Llampallas, Antoni (1985)
      Conference report
      Open Access
      A digital 16-bit high-speed general-purpose signal-processor is shown. The main objective has been the implementation of a linear predictive vocoder for obtaining real-time speech compression. For real-time digital speech ...
    • Caption text extraction for indexing purposes using a hierarchical region-based image model 

      León Cristóbal, Míriam; Vilaplana Besler, Verónica; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (2010-02-17)
      Conference lecture
      Open Access
      This paper presents a technique for detecting caption text for indexing purposes. This technique is to be included in a generic indexing system dealing with other semantic concepts. The various object detection algorithms ...
    • Classical methods of left ventricular contour extraction and preprocessing of echocardiographic images: a review 

      Torres Urgell, Lluís; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (1989)
      Conference report
      Open Access
      A main objective of digital processing of echocardiographic images is to improve the signal to noise ratio of the video images acquired from the ultrasound equipment along with contour extraction in order to obtain cardiac ...
    • Coagulation time detection by means of a real-time image processing 

      Gasull Llampallas, Antoni; Vallverdú Bayés, Sisco; Marqués Acosta, Fernando (. IEEE, 1992)
      Conference report
      Open Access
      Several techniques for semi-automatic or automatic detection of coagulation time in blood or in plasma analysis are available in the literature. However, these techniques are either complex and demand for specialized ...
    • Codificacion de imagenes: un metodo de segunda generacion 

      Marqués Acosta, Fernando; Gasull Llampallas, Antoni (Universidad de Málaga, 1992)
      Conference report
      Open Access
    • Codig-oriented segmentation based on g-m random 

      Marqués Acosta, Fernando; Gasull Llampallas, Antoni (1991)
      Conference report
      Open Access
      A new segmentation algorithm for still black and white images is introduced. This algorithm forms the basis of a region-oriented sequence coding technique, currently under development. The algorithm models the human mechanism ...
    • Constant variance transversal filtering for adaptive channel equalization 

      Vázquez Grau, Gregorio; Gasull Llampallas, Antoni; Sanchez, J J; Lagunas Hernandez, Miguel A. (1989)
      Conference report
      Open Access
    • Creació de recursos en línea per a l’autoaprenentage, foment de l’esperit crític i emprenedor i formació d’un comité d’avaluació externa en el màster MERIT 

      Pradell i Cara, Lluís; Cabrera-Bean, Margarita; Canal Bienzobas, Fernando; Cardama Aznar, Ángel; Gasull Llampallas, Antoni; González Arbesú, José María; Giró Nieto, Xavier; Heldring, Alexander; Herranz Luis, Jaime; Jofre Roca, Lluís; Mallorquí Franquet, Jordi Joan; Nadeu Camprubí, Climent; Olmos Bonafé, Juan José; Romeu Robert, Jordi; Rius Casals, Juan Manuel; Torres Torres, Francisco; Úbeda Farré, Eduard; Coderch Collell, Marcel; Kerans, Mary Ellen; Ros Giralt, Jordi; García, Antonio; González Font, Blanca; Guardiola Garcia, Marta; Hernández, Antoni; Melgarejo, Natali; Mestres, Albert (2009-02-12T10:25:51Z)
      Conference lecture / Conference report
      Open Access
      El projecte es desenvolupa en el marc de la titulació oficial de màster MERIT del Departament de Teoria del Senyal i Comunicacions. El màster, orientat a la recerca i integrat dins del programa Erasmus Mundus, presenta ...
    • Cross spectrum ML estimate 

      Lagunas Hernandez, Miguel A.; Santamaría Pérez, María Eugenia; Gasull Llampallas, Antoni; Moreno Bilbao, M. Asunción (Institute of Electrical and Electronics Engineers (IEEE), 1985)
      Conference report
      Open Access
      This work reports how to include general concepts of the one-dimensional MLM procedure in a two-channel problem of cross-spectrum estimation. It is shown in the sequel that there is no any problem in extrapolating the ...
    • Data pre-processing for high-resolution adaptive algorithms 

      Vázquez Grau, Gregorio; Gasull Llampallas, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1988)
      Conference report
      Open Access
      The inclusion of adaptive methods in high-resolution spectral estimation algorithms is considered. The generation of a complete family of spectral estimators from the normalized maximum-likelihood method (MLM) is discussed. ...
    • Data pre-processing for high-resolution adaptive algorithms 

      Vázquez Grau, Gregorio; Gasull Llampallas, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1988)
      Conference report
      Open Access
      The inclusion of adaptive methods in high-resolution spectral estimation algorithms is considered. The generation of a complete family of spectral estimators from the normalized maximum-likelihood method (MLM) is discussed. ...