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TRECVid 2011 Experiments at Dublin City University

Scott, David and Guo, Jinlin and Foley, Colum and Hopfgartner, Frank and Gurrin, Cathal and Smeaton, Alan F. (2012) TRECVid 2011 Experiments at Dublin City University. In: TRECVid 2011, 5-7 Dec 2011, Gaithersburg, Maryland.

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Abstract

This year the iAd-DCU team participated in three of the assigned TRECVid 2011 tasks; Semantic Indexing (SIN), Interactive Known-Item Search (KIS) and Multimedia Event Detection (MED). For the SIN task we presented three full runs using global features, local features and fusion of global, local features and relationships between concepts respectively. The evaluation results show that local features achieve better performance, with marginal gains found when introducing global features and relationships between concepts. With regard to our KIS submission, similar to our 2010 KIS experiments, we have implemented an iPad interface to a KIS video search tool. The aim of this year’s experimentation was to evaluate different display methodologies for KIS interaction. For this work, we integrate a clustering element for keyframes, which operates over MPEG-7 features using k-means clustering. In addition, we employ concept detection, not simply for search, but as a means of choosing most representative keyframes for ranked items. For our experiments we compare the baseline non-clustering system to a clustering system on a topic by topic basis. Finally, for the first time this year the iAd group at DCU has been involved in the MED Task. Two techniques are compared, employing low-level features directly and using concepts as intermediate representations. Evaluation results show promising initial results when performing event detection using concepts as intermediate representations.

Item Type:Conference or Workshop Item (Speech)
Event Type:Workshop
Refereed:Yes
Uncontrolled Keywords:Semantic Indexing; Interactive Known-Item Search; Multimedia Event Detection
Subjects:Computer Science > Multimedia systems
Computer Science > Information retrieval
Computer Science > Algorithms
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:17537
Deposited On:01 Oct 2012 10:47 by Jinlin Guo. Last Modified 01 Oct 2012 10:47

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