Enviaments recents

  • Practical extensions of connected operators 

    Oliveras Vergés, Albert; Salembier Clairon, Philippe Jean (KLUWER ACADEMIC PUB. KLUWER ACADEMIC PUBLISHERS, 1996)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper deals with the notion of connected operators. These operators are becoming popular in image processing because they have the fundamental property of simplifying the signal while preserving the contour information. ...
  • 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 ...
  • Partition coding using multi-grid chain code and motion compensation 

    Marqués Acosta, Fernando; Gasull Llampallas, Antoni (?, 1996)
    Text en actes de congrés
    Accés obert
    In this paper, a lossy partition coding technique is presented which leads to decoded partitions with unnoticeable losses. It uses a hexagonal grid for contour representation and it is based on the concept of multi-grid ...
  • A segmentation-based coding system allowing manipulation of objects (sesame) 

    Marqués Acosta, Fernando; Salembier Clairon, Philippe Jean; Pardàs Feliu, Montse; Marcotegui Iturmendi, Beatriz (?, 1996)
    Text en actes de congrés
    Accés obert
    We present a coding scheme that achieves, for each image in the sequence, the best segmentation in terms of rate-distortion theory. It is obtained from a set of initial regions and a set of available coding techniques. The ...
  • Partition tree for a segmentation-based video coding system 

    Pardàs Feliu, Montse; Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando; Morros, R (Institute of Electrical and Electronics Engineers (IEEE), 1996)
    Text en actes de congrés
    Accés obert
    In this paper we describe a very low bit rate video coding system that belongs to the class of object based coding systems. The system takes advantage of homogeneity in both gray level and motion, trying to use the most ...
  • Segmentation-based video coding:temporals links 

    Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando; Pardàs Feliu, Montse (1996)
    Text en actes de congrés
    Accés obert
    This paper analyzes the main elements that a segmentation-based video coding approach should be based on so that it can address coding efficiency and content-based functionalities. Such elements can be defined as temporal ...
  • Prediction error image coding using a modified stochastic vector quantization scheme 

    Torres Urgell, Lluís; Casas Pla, Josep Ramon (IEEE 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 ...
  • Morphological operators for very low bit rate video coding 

    Salembier Clairon, Philippe Jean; Meyer, F; Brigger, P; Bouchard, L (IEEE IEEE, 1996)
    Text en actes de congrés
    Accés obert
    This paper deals with the use of some morphological tools for video coding at very low bit rates. Rather than describing a complete coding algorithm, the purpose of this paper is to focus on morphological connected operators ...
  • An efficient technique of texture representation in segmentation-based image coding schemes 

    Torres Urgell, Lluís; Casas Pla, Josep Ramon; Campins, J (IEEE IEEE, 1995)
    Text en actes de congrés
    Accés obert
    In segmentation-based image coding techniques the image to be compressed is first segmented. Then, the information is coded describing the shape and the interior of the regions. A new method to encode the texture obtained ...
  • 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)
    Text en actes de congrés
    Accés obert
    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 ...

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