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

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

The annual colloquium on info retrieval study offers a chance for either new and validated researchers to provide papers describing paintings in development or ?nal effects. This colloquium was once proven by means of the BCS IRSG(B- tish laptop Society info Retrieval expert Group), and named the yearly Colloquium on details Retrieval study. lately, the site of the colloquium has alternated among the uk and continental Europe. To re?ect the starting to be 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 was once the ?rst time that the association of the colloquium have been together undertaken by way of 3 separate computing device and data 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 elevate within the variety of cross- caliber submissions in solution to the decision for papers over prior years and as such fifty two submitted papers have been every one allotted three individuals of this system committee for double blind evaluate of the manuscripts. a complete of 23 papers have been finally chosen for oral presentation on the colloquium in Glasgow which gave an attractiveness expense of below forty five% and ensured a really excessive common of the papers presented.

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

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A chain code approximates a curve with a sequence of directional vectors lying on a square grid. The technique is computationally efficient but suffers from digitisation noise. A well-established technique to describe closed planar curves is the use of Fourier descriptors (see for example [5] and [6]). Using the Fourier descriptors one can achieve representational invariance with respect to a variety of affine transformations; these descriptors have successfully been used for recognition tasks (eg [7]).

The information provided in these tables corresponds to whole retrieval sessions, that is, after feedback, if any. It is organised as follows: for each query (col. 1), and under various indexing conditions — that is, 20%, 40% or ad hoc indexing — (col. 2), relevance judgements are reported for the 10 best ranked images (col. 3 to 12): “T” stands for “thematically relevant”, “V” for “Visually relevant”. A session quality score Q is computed according to equation 1, with k = 2, n = 5, N = 1 (col.

Few items are specified in the query), a temporary label can be attached to the image. Repeated successful retrievals of this image will increase the hypothesis confidence until it becomes a regular indexing item. Furthermore, as initial visual clustering allows the identification of homogeneous images, we think that the ad hoc indexing process can be facilitated: each cluster is examined, and at least one image of a representative theme is manually indexed. Our process ensures that if this cluster is retrieved based on some textual query, all images in this cluster get a chance to be retrieved by means of the tunnel mechanism.

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