Computer Science – Information Retrieval
Scientific paper
2010-07-19
Computer Science
Information Retrieval
7 pages. Young Scientists Conference, 4th Russian Summer School in Information Retrieval
Scientific paper
In order to protect an image search engine's users from undesirable results adult images' classifier should be built. The information about links from websites to images is employed to create such a classifier. These links are represented as a bipartite website-image graph. Each vertex is equipped with scores of adultness and decentness. The scores for image vertexes are initialized with zero, those for website vertexes are initialized according to a text-based website classifier. An iterative algorithm that propagates scores within a website-image graph is described. The scores obtained are used to classify images by choosing an appropriate threshold. The experiments on Internet-scale data have shown that the algorithm under consideration increases classification recall by 17% in comparison with a simple algorithm which classifies an image as adult if it is connected with at least one adult site (at the same precision level).
Belyaev Dmitry
Kharitonov Evgeny
Kotlyarov Dmitry
Muchnik Ilya
Romanenko Fedor
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