Now showing items 1-8 of 8

  • Automatic keyframe selection based on mutual reinforcement algorithm 

    Ventura Royo, Carles; Giró Nieto, Xavier; Vilaplana Besler, Verónica; Giribet, Daniel; Carasusan, Eusebio (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    This paper addresses the problem of video summarization through an automatic selection of a single representative keyframe. The proposed solution is based on the mutual reinforcement paradigm, where a keyframe is selected ...
  • Hierarchical navigation and visual search for video keyframe retrieval 

    Ventura Royo, Carles; Martos Asensio, Manuel; Giró Nieto, Xavier; Vilaplana Besler, Verónica; Marqués Acosta, Fernando (Springer Verlag, 2012)
    Conference lecture
    Open Access
    This work presents a browser that supports two strategies for video browsing: the navigation through visual hierarchies and the retrieval of similar images. The input videos are firstly processed by a keyframe extractor ...
  • Image-Based Query by Example Using MPEG-7 Visual Descriptors 

    Ventura Royo, Carles (Escola Tècnica Superior de Telecomunicació de Barcelona, 2010)
    Master thesis (pre-Bologna period)
    Open Access
    This project presents the design and implementation of a Content-Based Image Retrieval (CBIR) system where queries are formulated by visual examples through a graphical interface. Visual descriptors and similarity measures ...
  • Improving retrieval accuracy of Hierarchical Cellular Trees for generic metric spaces 

    Ventura Royo, Carles; Vilaplana Besler, Verónica; Giró Nieto, Xavier; Marqués Acosta, Fernando (2013-09)
    Restricted access - publisher's policy
    Abstract Metric Access Methods (MAMs) are indexing techniques which al- low working in generic metric spaces. Therefore, MAMs are specially useful for Content-Based Image Retrieval systems based on features which use ...
  • Improving spatial codification in semantic segmentation 

    Ventura Royo, Carles; Giró Nieto, Xavier; Vilaplana Besler, Verónica (2015)
    Conference report
    Restricted access - publisher's policy
    This paper explores novel approaches for improving the spatial codification for the pooling of local descriptors to solve the semantic segmentation problem. We propose to partition the image into three regions for each ...
  • Tools for image retrieval in large multimedia databases 

    Ventura Royo, Carles (Universitat Politècnica de Catalunya, 2011-09-07)
    Master thesis
    Open Access
    English: One of the challenges in the development of an image retrieval system is to achieve an efficient indexing scheme since both developers and users, who are used to make requests in order to find a multimedia element ...
  • UPC at MediaEval 2013 Hyperlinking Task 

    Ventura Royo, Carles; Tella-Amo, Marcel; Giró Nieto, Xavier (CEUR Workshop Proceedings, 2013)
    Conference lecture
    Open Access
    These working notes paper present the contribution of the UPC team to the Hyperlinking sub-task of the Search and Hyperlinking Task in MediaEval 2013. Our contribution ex- plores the potential of a solution based only ...
  • Visual object analysis using regions and local features 

    Ventura Royo, Carles (Universitat Politècnica de Catalunya, 2016-07-08)
    Doctoral thesis
    Open Access
    The first part of this dissertation focuses on an analysis of the spatial context in semantic image segmentation. First, we review how spatial context has been tackled in the literature by local features and spatial ...