Download Advances in Information Retrieval: 24th BCS-IRSG European by Thomas Sødring, Alan F. Smeaton (auth.), Fabio Crestani, PDF

By Thomas Sødring, Alan F. Smeaton (auth.), Fabio Crestani, Mark Girolami, Cornelis Joost van Rijsbergen (eds.)

ISBN-10: 3540433430

ISBN-13: 9783540433439

ISBN-10: 3540458867

ISBN-13: 9783540458869

The annual colloquium on details retrieval study presents a chance for either new and proven researchers to give papers describing paintings in growth or ?nal effects. This colloquium used to be proven via the BCS IRSG(B- tish laptop Society details Retrieval professional Group), and named the yearly Colloquium on info Retrieval examine. lately, the positioning of the colloquium has alternated among the uk and continental Europe. To re?ect the transforming into eu orientation of the development, the colloquium used to be renamed “European Annual Colloquium on info Retrieval study” from 2001. because the inception of the colloquium in 1979 the development has been hosted within the urban of Glasgow on 4 separate events. even if, this used to be the ?rst time that the association of the colloquium were together undertaken through 3 separate laptop and knowledge technology departments; a sign of the collaborative nature and variety of IR examine in the universities of the West of Scotland. The organizers of ECIR 2002 observed a pointy bring up within the variety of move- caliber submissions in solution to the decision for papers over past years and as such fifty two submitted papers have been each one allotted three contributors of this system committee for double blind overview of the manuscripts. a complete of 23 papers have been ultimately chosen for oral presentation on the colloquium in Glasgow which gave an attractiveness price of lower than forty five% and ensured a really excessive regular of the papers presented.

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Additional resources for Advances in Information Retrieval: 24th BCS-IRSG European Colloquium on IR Research Glasgow, UK, March 25–27, 2002 Proceedings

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Mean average precision and the corresponding standard deviation is given in brackets. sum of the perpendiculars from any point onto the three sides is a constant, the condition f wf = 1 is satisfied. Figure 2 shows the mean average precision values (averaged over all 238 queries) as grey value for all possible combinations of the three weights. Note that the performance of the single-value models is found at the respective corners of the triangle (where two of the three weights are zero). The large circle near the base of the moment invariants represents the combination of descriptor weights for which average precision reaches the global maximum.

3. R. Duda and P. Hart. Pattern Classification and Scene Analysis. John Wiley and Sons, 1973. 4. M. Dunlop. Multimedia Information Retrieval. PhD thesis, Glasgow University, Scotland, 1991. 5. A. El-Hamdouchi and P. Willett. Techniques for the measurement of clustering tendency in document retrieval systems. Journal of Information Science, 13:361– 365, 1987. 6. C. Fellbaum, editor. WORDNET: An Electronic Lexical Database. MIT Press, 1998. 7. V. Govindaraju. Locating human faces in photographs. International Journal of Computer Vision, 19(2):129–146, 1996.

A subset of 128 representative colours can be selected from the entire corpus, so that each image can be quantised according to this reduced colour map, and represented by a 128-components vector. To improve localisation and to allow “layout” comparison, features are not only computed over the entire image, but also on small image areas: a fixed grid is applied on the image, defining 32x32 pixels squares called tiles. A colour histogram is computed for each tile of each image in the corpus. The spatial organisation of visually homogeneous areas (according to the colour feature) provides for a rough sketch of the “shapes” contained in the image.

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Advances in Information Retrieval: 24th BCS-IRSG European Colloquium on IR Research Glasgow, UK, March 25–27, 2002 Proceedings by Thomas Sødring, Alan F. Smeaton (auth.), Fabio Crestani, Mark Girolami, Cornelis Joost van Rijsbergen (eds.)


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