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Ara es mostren els items 42-61 de 61

    • Prediction error image coding using a modified stochastic vector quantization scheme 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon (IEEE, 1996)
      Text en actes de congrés
      Accés obert
      The objective of this paper is to provide an efficient and yet simple method to encode the prediction error image of video sequences, based on a stochastic vector quantization (SVQ) approach that has been modified to cope ...

    • Processament del senyal - Col.lecció de Problemes 

      Hernando Pericás, Francisco Javier; Lagunas Hernandez, Miguel A.; Marqués Acosta, Fernando; Mariño Acebal, José Bernardo; Monte Moreno, Enrique; Nadeu Camprubí, Climent; Oliveras Vergés, Albert; Rodríguez Fonollosa, Javier; Torres Urgell, Lluís; Vázquez Grau, Gregorio; Vidal Manzano, José (Universitat Politècnica de Catalunya, 2003)
      Problema, exercici
      Accés obert

    • Region-based video coding using mathematical morphology 

      Salembier Clairon, Philippe Jean; Torres Urgell, Lluís; Meyer, F; Gu, C (1995-06)
      Article
      Accés obert
      This paper presents a region-based coding algorithm for video sequences. The coding approach involves a time-recursive segmentation relying on the pixels homogeneity, a region-based motion estimation, and motion compensated ...

    • Residual image coding using mathematical morphology 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (1994)
      Text en actes de congrés
      Accés obert
      A new method for the extraction, selection and coding of perceptually significant image components in a video sequence is presented. It has been applied to the coding residues of a segmentation-based multilevel coding ...

    • Second generation video coding schemes and their role in mpeg-4 

      Torres Urgell, Lluís; Pereira Marques, Fernando; Kunt, Murat (UNIVERSITÉ CATHOLIQUE DE LOUVAIN, 1996)
      Text en actes de congrés
      Accés obert
      Since its introduction in 1985, there has been a lot of activity in the eld of second generation still image coding. In the last years, the approach has been extended to video coding and has been the basis for European ...

    • Segmentation based coding of textures using stochastic vector quantization 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon; Diego, de S (1994)
      Text en actes de congrés
      Accés obert
      In second generation image compression techniques the image to be compressed is first segmented. The pixels are divided into mutually exclusive spatial regions based on some criteria. After segmentation, the image consists ...

    • Software con la implementación de los descriptores de vídeo seleccionados 

      Raventós, Arnau; Torres Urgell, Lluís; Tarrés Ruiz, Francisco (2011-10-30)
      Report de recerca
      Accés restringit per acord de confidencialitat
      Entregable E 3.1.2

    • Stochastic vector quantization of images 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon; Arias, E (1997-11)
      Article
      Accés restringit per política de l'editorial
      One of the most important steps in the vector quantization of images is the design of the codebook. The codebook is generally designed using the LBG algorithm, that is in essence a clustering algorithm which uses a large ...

    • Strong edge features for image coding 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (P. MARAGOS, R.W. SCHAFER KLUWER ACADEMIA PUBLISHERS, 1996)
      Text en actes de congrés
      Accés obert
      A two-component model is proposed for perceptual image coding. For the first component of the model, the watershed operator is used to detect strong edge features. Then, an efficient morphological interpolation algorithm ...

    • Svq: a proposal for still image coding in mpeg 4 - snhc 

      Torres Urgell, Lluís; Gimeno, D; García Luque, David (European Commission. EU Publications, 1997)
      Text en actes de congrés
      Accés obert
      A technique for efficient coding of homogeneous textures is presented here. The technique is based on the use of Stochastic Vector Quantization and provides very high compression with graceful degradation. To encode the ...

    • Tecnologías de análisis audiovisual para la anotación automática de metadatos 

      Mindan, Pere J.; Raventós, Arnau; Mur, Olga; Tarrés Ruiz, Francisco; Torres Urgell, Lluís (2011-08-31)
      Report de recerca
      Accés restringit per acord de confidencialitat
      Entregable E 1.3.1

    • Temporal automatic edge detection of echocardiographic images 

      Torres Urgell, Lluís; Gasull Llampallas, Antoni (1990)
      Text en actes de congrés
      Accés obert

    • Técnicas de preprocesado para la segmentación de imágenes 

      Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Montolio, P.; Torres Urgell, Lluís (Universidad de Málaga, 1992)
      Text en actes de congrés
      Accés obert

    • The importance of audio descriptors in automatic soccer highlights generation 

      Raventós Mayoral, Arnau; Quijada Ferrero, Raúl; Torres Urgell, Lluís; Tarrés Ruiz, Francisco; Carasusan, Eusebio; farre Giribet, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Automatic generation of sports highlights from recorded audiovisual content has been object of great interest in recent years. The problem is indeed important in the production of second and third division leagues highlights ...

    • The importance of color information in face recognition 

      Torres Urgell, Lluís; Reutter, Jean-Yves; Lorente, Luis (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      A common feature found in practically all technical approaches proposed for face recognition is the use of only the luminance information associated to the face image. One may wonder if this is due to the low importance ...

    • Three dimensional adaptive Laplacian Pyramid image coding 

      Sallent Ribes, Sebastián; Torres Urgell, Lluís; Gils, L. (Elsevier, 1990)
      Text en actes de congrés
      Accés obert

    • Transparencias de Señales y Procesos Estocásticos 

      Vidal Manzano, José; Torres Urgell, Lluís; Mariño Acebal, José Bernardo; Nadeu Camprubí, Climent (Universitat Politècnica de Catalunya, 2003)
      Apunts
      Accés obert

    • Vector quantization in image sequence coding 

      Huguet, Jordi; Torres Urgell, Lluís (1990)
      Text en actes de congrés
      Accés obert

    • XARXES DE COMUNICACIO I TELEMATICA (Examen 2n Quadr.) 

      Torres Urgell, Lluís (Universitat Politècnica de Catalunya, 2003-06-12)
      Examen
      Accés restringit a la comunitat UPC

    • XARXES I SERVEIS AUDIO-VISUALS (Examen 2n Quadr.) 

      Torres Urgell, Lluís (Universitat Politècnica de Catalunya, 2004-06-08)
      Examen
      Accés restringit a la comunitat UPC