Enviaments recents

  • Non-noticeable information embedding in color images: marking and detection 

    Vidal Manzano, José; Sayrol Clols, Elisa; Cabanillas, Silvia; Santamaria, Sonia (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    One of the problems arising from the use of digital media is the ease of obtaining identical copies of digital images or audio files, allowing manipulation and unauthorized use. Copyright is an effective tool for preserving ...
  • The DICEMAN description schemes for still images and video sequences 

    O'Connor, Noel; Salembier Clairon, Philippe Jean; Correia, P. (HHI, 1999)
    Text en actes de congrés
    Accés obert
    To address the problem of visual content description, two Description Schemes (DSs) developed within the context of a European ACTS project known as DICEMAN, are presented. The DSs, designed based on an analogy with ...
  • A video object generation tool allowing friendly user interaction 

    Marcotegui Iturmendi, Beatriz; Correia Fernandez-Pereira, Paulo; Marqués Acosta, Fernando; Mech, R.; Rosa, R; Wollborn, M; Zanoguera, Francisca (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    In this paper we describe an interactive video object segmentation tool developed in the framework of the ACTS-AC098 MOMUSYS project. The Video Object Generator with User Environment (VOGUE) combines three different sets ...
  • A proposal for dependent optimization in scalabale region-based coding systems 

    Morros, R; Marqués Acosta, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    We address in this paper the problem of optimal coding in the framework of region-based video coding systems, with a special stress on content-based functionalities. We present a coding system that can provide scaled layers ...
  • Representing and retrieving regions using binary partition trees 

    Garrido Ostermann, Luis; Salembier Clairon, Philippe Jean; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    This paper discusses the interest of Binary Partition Trees for image and region representation in the context of indexing and similarity based retrieval. Binary Partition Trees concentrate in a compact and structured way ...
  • Connected operators for sprite creation and layered representation of image sequences 

    Salembier Clairon, Philippe Jean; Pujol, O; Garrido Ostermann, Luis (1998)
    Text en actes de congrés
    Accés obert
    This paper proposes and discusses the use of motion-oriented connected operators for sprite creation. Motion-oriented connected operators are tools allowing the simplification of frames by removing objects that do not ...
  • Region based analysis of video sequences with a general merging algorithm 

    Garrido Ostermann, Luis; Salembier Clairon, Philippe Jean (1998)
    Text en actes de congrés
    Accés obert
    Connected operators [4] and Region Growing [2] algorithms have been created in different context and applications. However, they all are based on the same fundamental merging process. This paper discusses the basic issues ...
  • Video object segmentation introducing depth and motion information 

    Pardàs Feliu, Montse (Institute of Electrical and Electronics Engineers (IEEE), 1998)
    Text en actes de congrés
    Accés obert
    We present a method to estimate the relative depth between objects in scenes of video sequences. The information for the estimation of the relative depth is obtained from the overlapping produced between objects when there ...
  • Optimum Watermark Detection and Embedding in Digital Images 

    Vidal Manzano, José; Sayrol Clols, Elisa (Ping Wah Wong, Abeer Alwan, Antonio Ortega, C.-C. Jay Kuo, C.L. Max Nikias/ IEEE, 1998)
    Text en actes de congrés
    Accés obert
    This work concentrates on the problem of watermarking of still images using the luminance component, through the use of spread spectrum techniques, both in space (direct sequence spread spectrum or DSSS) and frequency ...
  • Auto-dual connected operators based on iterative merging algorithms 

    Salembier Clairon, Philippe Jean; Garrido Ostermann, Luis; Garcia, D (Kluwer Academic Publishers, 1998)
    Text en actes de congrés
    Accés obert
    This paper proposes a new set of connected operators that are autodual. Classical connected operators are analyzed within the framework of merging algorithms. The discussion highlights three basic notions: merging order ...

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