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K-Space at TRECVid 2007

Wilkins, Peter and Adamek, Tomasz and Byrne, Daragh and Jones, Gareth J.F. and Lee, Hyowon and Keenan, Gordon and McGuinness, Kevin and O'Connor, Noel E. and Smeaton, Alan F. (2007) K-Space at TRECVid 2007. In: TRECVid 2007 - Text REtrieval Conference TRECVid Workshop, 5-6 November 2007, Gaithersburg, Maryland.

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Abstract

In this paper we describe K-Space participation in TRECVid 2007. K-Space participated in two tasks, high-level feature extraction and interactive search. We present our approaches for each of these activities and provide a brief analysis of our results. Our high-level feature submission utilized multi-modal low-level features which included visual, audio and temporal elements. Specific concept detectors (such as Face detectors) developed by K-Space partners were also used. We experimented with different machine learning approaches including logistic regression and support vector machines (SVM). Finally we also experimented with both early and late fusion for feature combination. This year we also participated in interactive search, submitting 6 runs. We developed two interfaces which both utilized the same retrieval functionality. Our objective was to measure the effect of context, which was supported to different degrees in each interface, on user performance. The first of the two systems was a ‘shot’ based interface, where the results from a query were presented as a ranked list of shots. The second interface was ‘broadcast’ based, where results were presented as a ranked list of broadcasts. Both systems made use of the outputs of our high-level feature submission as well as low-level visual features.

Item Type:Conference or Workshop Item (Paper)
Event Type:Workshop
Refereed:Yes
Subjects:Computer Science > Information storage and retrieval systems
Computer Science > Digital video
DCU Faculties and Centres:Research Initiatives and Centres > Centre for Digital Video Processing (CDVP)
Research Initiatives and Centres > Adaptive Information Cluster (AIC)
Publisher:NIST
Official URL:http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:European Commission FP6-027026
ID Code:432
Deposited On:10 Apr 2008 by DORAS Administrator. Last Modified 04 May 2010 16:43

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