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<h1 class="page-header">CERTH @ MediaEval 2011 Social Event Detection Task</h1>
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<span property="dc:title" content="CERTH @ MediaEval 2011 Social Event Detection Task" class="rdf-meta element-hidden"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span> </header>
<div id="biblio-node"><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=CERTH+%40+MediaEval+2011+Social+Event+Detection+Task&rft.series=CEUR+Workshop+Proceedings&rft.date=2011&rft.volume=807&rft.aulast=Papadopoulos&rft.aufirst=Symeon&rft.au=Zigkolis%2C+Christos&rft.au=Kompatsiaris%2C+Yiannis&rft.au=Vakali%2C+Athena&rft.pub=CEUR-WS.org"></span><div class="table-responsive">
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<tr><td class="biblio-row-title">Title</td><td>CERTH @ MediaEval 2011 Social Event Detection Task</td> </tr>
<tr><td class="biblio-row-title">Publication Type</td><td>Conference Paper</td> </tr>
<tr><td class="biblio-row-title">Year of Publication</td><td>2011</td> </tr>
<tr><td class="biblio-row-title">Authors</td><td><a href="publications%3Ff[author]=72.html" rel="nofollow">Papadopoulos, Symeon</a>, <a href="publications%3Ff[author]=337.html" rel="nofollow">Christos Zigkolis</a>, <a href="publications%3Ff[author]=74.html" rel="nofollow">Yiannis Kompatsiaris</a>, and <a href="publications%3Ff[author]=5.html" rel="nofollow">Athena Vakali</a></td> </tr>
<tr><td class="biblio-row-title">Editor</td><td><a href="publications%3Ff[author]=165.html" rel="nofollow">Larson, Martha</a>, <a href="publications%3Ff[author]=166.html" rel="nofollow">Adam Rae</a>, <a href="publications%3Ff[author]=342.html" rel="nofollow">Claire-Helene Demarty</a>, <a href="publications%3Ff[author]=168.html" rel="nofollow">Christoph Kofler</a>, <a href="publications%3Ff[author]=169.html" rel="nofollow">Florian Metze</a>, <a href="publications%3Ff[author]=354.html" rel="nofollow">Raphaël Troncy</a>, <a href="publications%3Ff[author]=171.html" rel="nofollow">Vasileios Mezaris</a>, and <a href="publications%3Ff[author]=172.html" rel="nofollow">Gareth J. F. Jones</a></td> </tr>
<tr><td class="biblio-row-title">Book Title</td><td>MediaEval</td> </tr>
<tr><td class="biblio-row-title">Publisher</td><td>CEUR-WS.org</td> </tr>
<tr><td class="biblio-row-title">Abstract</td><td><p>This paper describes the participation of CERTH in the “SocialEvent Detection Task @ MediaEval 2011”, which aimsat discovering social events in a large photo collection. Thetask comprises two challenges: (i) identification of soccerevents in the cities of Barcelona and Rome, and (ii) identificationof events taking place in two specific venues. Weadopt an approach that combines spatial and temporal filterswith tag-based location classification models and an ef-ficient photo clustering method. In our best runs, we achieveF-measure and NMI scores of 77.4% and 0.63 respectivelyfor Challenge 1, and 64% and 0.38 for Challenge 2.</p>
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