Generative Probabilistic Models

T.H.W. Westerveld, Franciska M.G. de Jong

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Many content-based multimedia retrieval tasks can be seen as decision theory problems. Clearly, this is the case for classification tasks, like face detection, face recognition, or indoor/outdoor classification. In all these cases a system has to decide whether an image (or video) belongs to one class or another (respectively face or no face; face A, B, or C; and indoor or outdoor). Even the ad hoc retrieval tasks, where the goal is to find relevant documents given a description of an information need, can be seen as a decision theory problem: documents can be classified into relevant and non-relevant classes, or we can treat each of the documents in the collection as a separate class, and classify a query as belonging to one of these. In all these settings, a probabilistic approach seems natural: an image is assigned to the class with the highest probability.3 If some misclassifications are more severe than others, a decision theoretic approach should be taken, and images should be assigned to the class with lowest risk.
Original languageUndefined
Title of host publicationMultimedia Retrieval
EditorsHenk Blanken, H.E. Blok, A.P. de Vries, L. Feng
Place of PublicationBerlin Heidelberg
Number of pages22
ISBN (Print)978-3-540-72894-8
Publication statusPublished - 2007

Publication series

NameData-Centric Systems and Applications
PublisherSpringer Verlag


  • METIS-241569
  • EWI-9624
  • IR-63988

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