Browsing by Author "Ventura Royo, Carles"Més informació

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    • A closer look at referring expressions for video object segmentation 

      Bellver Bueno, Míriam; Ventura Royo, Carles; Silberer, Carina; Kazakos, Ioannis; Torres Viñals, Jordi; Giró Nieto, Xavier (2023-01)
      Article
      Open Access
      The task of Language-guided Video Object Segmentation (LVOS) aims at generating binary masks for an object referred by a linguistic expression. When this expression unambiguously describes an object in the scene, it is ...

    • 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 ...

    • Examen Final 

      Bonafonte Cávez, Antonio; Marqués Acosta, Fernando; Ventura Royo, Carles (Universitat Politècnica de Catalunya, 2012-06-10)
      Exam
      Restricted access to the UPC academic community

    • 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)
      Article
      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 ...

    • RVOS: end-to-end recurrent network for video object segmentation 

      Ventura Royo, Carles; Bellver, Míriam; Girbau Xalabarder, Andreu; Salvador Aguilera, Amaia; Marqués Acosta, Fernando; Giró Nieto, Xavier (2019-06-15)
      Article
      Open Access
      Multiple object video object segmentation is a challenging task, specially for the zero-shot case, when no object mask is given at the initial frame and the model has to find the objects to be segmented along the sequence. ...

    • RVOS: end-to-end recurrent network for video object segmentation 

      Ventura Royo, Carles; Bellver Bueno, Míriam; Girbau Xalabarder, Andreu; Salvador Aguilera, Amaia; Marqués Acosta, Fernando; Giró Nieto, Xavier (Computer Vision Foundation, 2019)
      Conference lecture
      Open Access
      Multiple object video object segmentation is a challenging task, specially for the zero-shot case, when no object mask is given at the initial frame and the model has to find the objects to be segmented along the sequence. ...

    • 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 ...