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- W2623263547 abstract "This article presents an efficient and totally unsupervised content-based similarity search method for multimedia data objects represented by high-dimensional feature vectors. The assumption is that the similarity measure is applicable to feature vectors of arbitrary length. During the offline process, different sets of features are selected by a generalized version of the Laplacian Score in an unsupervised way for individual data objects in the database. Online retrieval is performed by ranking the query object in the feature spaces of candidate objects. Those candidates for which the query object is ranked highly are selected as the query results. The ranking scheme is incorporated into an automated query expansion framework to further improve the semantic quality of the search result. Extensive experiments were conducted on several datasets to show the capability of the proposed method in boosting effectiveness without losing efficiency." @default.
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- W2623263547 date "2017-05-31" @default.
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- W2623263547 title "Query Expansion for Content-Based Similarity Search Using Local and Global Features" @default.
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- W2623263547 doi "https://doi.org/10.1145/3063595" @default.
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