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Epic A photograph retrieval system based on evidence combination approach.pdf

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Epic A photograph retrieval system based on evidence combination approach

Epic: A Photograph Retrieval System Based on Evidence CombinationApproachJoemon M. Jose and David J. HarperThe Robert Gordon UniversityAberdeen, UK, AB25 1HG.fj.jose,d.harperg@scms.rgu.ac.uk. AbstractIn this paper, we describe a system which applies an evi-dence combination approach for the retrieval of photographsfrom large repositories. To achieve eective retrieval we usefeatures derived from various components (such as text, andimage) of the photographic document. As photographic fea-tures we use spatial features, which are objects and theirlocations in the photograph. We use these spatial featuresalong with other textual features derived from the variouscomponents of the document. A user can search based onany of the features or in combination. For the combinationof evidence we apply the Dempster-Shafer theory. In thiscombination scheme, we achieve the integration of databaseand information retrieval mechanisms into one computa-tional model.The architecture of the system is based on a client-serverarchitecture. The server is built using ECLAIR, an extensi-ble class library for information retrieval developed on topof an object-oriented database management system. Theclient is built using the Java programming language. Thearchitecture of the server allows the integration of DB andIR approaches at the implementation level. The usefulnessof the spatial features is evaluated using practicing graphicdesigners and has given very promising results.KEYWORDS: Photograph Information Retrieval, Mul-timedia Databases, Database and Information Retrieval In-tegration, Spatial Features, Evidence Combination1 IntroductionDue to the widespread use of photographs in everyday life,there is a need for storing, managing and retrieving pho-tographs. A large amount of pictorial information is pro-duced in domains like the newspaper industry, the advertis-ing business and the publishing industry. Journalists maylook for photographs that describe an event or concern aperson. Advertisin