Now showing items 1-20 of 136

  • Acoustic event detection based on feature-level fusion of audio and video modalities 

    Butko, Taras; Canton Ferrer, Cristian; Segura Perales, Carlos; Giró Nieto, Xavier; Nadeu Camprubí, Climent; Hernando Pericás, Francisco Javier; Casas Pla, Josep Ramon (HINDAWI, 2011-03-15)
    Article
    Open Access
    Acoustic event detection (AED) aims at determining the identity of sounds and their temporal position in audio signals. When applied to spontaneously generated acoustic events, AED based only on audio information shows a ...
  • An interactive lifelog search engine for LSC2018 

    Alsina, Adrià; Giró Nieto, Xavier; Gurrin, Cathal (Association for Computing Machinery (ACM), 2018)
    Conference lecture
    Open Access
    In this work, we describe an interactive lifelog search engine developed for the LSC 2018 search challenge at ACM ICMR 2018. The paper introduces the four-step process required to support lifelog search engines and describes ...
  • APLICACIONS A LA CREACIO DE CONTINGUTS MULTIMEDIA (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2006-01-13)
    Exam
    Restricted access to the UPC academic community
  • Assessing knee OA severity with CNN attention-based end-to-end architectures 

    Górriz, Marc; Antony, Joseph; McGuinness, Kevin; Giró Nieto, Xavier; O'Connor, Noel (2019)
    Conference lecture
    Open Access
    This work proposes a novel end-to-end convolutional neural network (CNN) architecture to automatically quantify the severity of knee osteoarthritis (OA) using X-Ray images, which incorporates trainable attention modules ...
  • Assessment of crowdsourcing and gamification loss in user-assisted object segmentation 

    Carlier, Axel; Salvador Aguilera, Amaia; Cabezas, Ferran; Giró Nieto, Xavier; Charvillat, Vincent; Marques, Oge (2015-09-12)
    Article
    Open Access
    There has been a growing interest in applying human computation – particularly crowdsourcing techniques – to assist in the solution of multimedia, image processing, and computer vision problems which are still too difficult ...
  • Audiovisual event detection towards scene understanding 

    Canton Ferrer, Cristian; Butko, Taras; Segura, C.; Giró Nieto, Xavier; Nadeu Camprubí, Climent; Hernando Pericás, Francisco Javier; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Conference report
    Restricted access - publisher's policy
    Acoustic events produced in meeting environments may contain useful information for perceptually aware interfaces and multimodal behavior analysis. In this paper, a system to detect and recognize these events from a ...
  • 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 ...
  • Bags of local convolutional features for scalable instance search 

    Mohedano, Eva; Salvador Aguilera, Amaia; McGuinness, Kevin; Marqués Acosta, Fernando; O'Connor, Noel; Giró Nieto, Xavier (Association for Computing Machinery (ACM), 2016)
    Conference lecture
    Open Access
    This work proposes a simple instance retrieval pipeline based on encoding the convolutional features of CNN using the bag of words aggregation scheme (BoW). Assigning each local array of activations in a convolutional layer ...
  • BitSearch, the blog before the thesis 

    Giró Nieto, Xavier (2010)
    Conference lecture
    Open Access
  • Class-weighted convolutional features for visual instance search 

    Jiménez, Albert; Alvarez, Jose M.; Giró Nieto, Xavier (2017)
    Conference lecture
    Open Access
    Image retrieval in realistic scenarios targets large dynamic datasets of unlabeled images. In these cases, training or fine-tuning a model every time new images are added to the database is neither efficient nor scalable. ...
  • Click'n'Cut: crowdsourced interactive segmentation with object candidates 

    Carlier, Axel; Charvillat, Vincent; Salvador Aguilera, Amaia; Giró Nieto, Xavier; Marques, Ogé (ACM, 2014)
    Conference lecture
    Open Access
    This paper introduces Click’n’Cut, a novel web tool for inter- active object segmentation designed for crowdsourcing tasks. Click’n’Cut combines bounding boxes and clicks generated by workers to obtain accurate object ...
  • Comparing fixed and adaptive computation time for recurrent neural networks 

    Fojo, Daniel; Campos Camunez, Victor; Giró Nieto, Xavier (2018)
    Conference report
    Open Access
    Deep networks commonly perform better than shallow ones, but allocating the proper amount of computation for each particular input sample remains an open problem. This issue is particularly challenging in sequential tasks, ...
  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2009-01-09)
    Exam
    Restricted access to the UPC academic community
  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2008-01-07)
    Exam
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  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2007-01-12)
    Exam
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  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2005-01-10)
    Exam
    Restricted access to the UPC academic community
  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2004-01-07)
    Exam
    Restricted access to the UPC academic community
  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2003-11-03)
    Exam
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  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2007-11-07)
    Exam
    Restricted access to the UPC academic community
  • COMUNICACIÓ AUDIO-VISUAL (Examen 1r Quadr.) 

    Giró Nieto, Xavier (Universitat Politècnica de Catalunya, 2005-10-31)
    Exam
    Restricted access to the UPC academic community