Type

Conference Proceedings

Authors

Alan F. Smeaton
Gareth J. F. Jones
Eamonn Newman
Cathal Gurrin
Peter Wilkins
Neil O'Hare

Subjects

Computer Science

Topics
image retrieval k means clustering information retrieval pseudo relevance feedback image processing english language diversity information storage and retrieval systems

Diversity in image retrieval: DCU at ImageCLEFPhoto 2008 (2008)

Abstract DCU participated in the ImageCLEF 2008 photo retrieval task, submitting runs for both the English and Random language annotation conditions. Our approaches used text-based and image-based retrieval approaches to give baseline retrieval runs, with the highest-ranked images from these baseline runs clustered using K-Means clustering of the text annotations. Finally, each cluster was represented by its most relevant image and these images were ranked for the nal submission. For random annotation language runs, we used TextCat1 to identify German annotation documents, which were then translated into English using Systran Version:3.0 Machine Translator. We also compared results from these translated runs with untranslated runs. Our results showed that, as expected, runs that combine image and text outperform text alone and image alone. Our baseline image+text runs (i.e. without clustering) give our best MAP score, and these runs also outperformed the mean and median ImageCLEFPhoto submissions for CR@20. Clustering approaches consistently gave a large improvement in CR@20 over the baseline, unclustered results. Pseudo relevance feedback consistently improved MAP while also consistently decreasing CR@20. We also found that the performance of untranslated random runs was quite close to that of translated random runs for CR@20, indicating that we could achieve similar diversity in our results without translating the documents.
Collections Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: Centre for Digital Video Processing (CDVP)
Ireland -> Dublin City University -> Subject = Computer Science: Information storage and retrieval systems
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres
Ireland -> Dublin City University -> Publication Type = Conference or Workshop Item
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Computing
Ireland -> Dublin City University -> Subject = Computer Science: Image processing
Ireland -> Dublin City University -> Subject = Computer Science
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: CLARITY: The Centre for Sensor Web Technologies
Ireland -> Dublin City University -> Subject = Computer Science: Information retrieval
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing

Full list of authors on original publication

Alan F. Smeaton, Gareth J. F. Jones, Eamonn Newman, Cathal Gurrin, Peter Wilkins, Neil O'Hare

Experts in our system

1
Alan F. Smeaton
Dublin City University
Total Publications: 450
 
2
Gareth J. F. Jones
Dublin City University
Total Publications: 265
 
3
Eamonn Newman
Dublin City University
Total Publications: 27
 
4
Cathal Gurrin
Dublin City University
Total Publications: 182