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Method for fuzzy logic rule based multimedia information retrival with text and perceptual features

  • US 7,065,521 B2
  • Filed: 03/07/2003
  • Issued: 06/20/2006
  • Est. Priority Date: 03/07/2003
  • Status: Expired due to Fees
First Claim
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1. A method for searching a database comprising, in a computer:

  • inputting a search string that comprises a plurality of search string arguments connected by one or more operators wherein each search string argument specifies a search criteria;

    computing a distance measure between a quantitative characterization corresponding to each of one or more of the search criteria, and quantitative characterizations of each of a plurality of records;

    selecting records for inclusion in answer sets for each mth search criteria among the one or more search criteria based, at least in part, on a plurality of distance measures each involving a quantitative characterization corresponding to the mth search criteria, and a quantitative characterization corresponding to one of the plurality of records;

    for each jth record in the answer set of each mth search criteria among the one or more search criteria, computing a retrieval relevance value by a method that comprises mapping a distance measure corresponding to the mth search criteria and the jth record into a finite range;

    for each ith record in the answer set of an mth content based retrieval algorithm based query, computing a retrieval relevance value by evaluating a function of the following form;


    RRVi,mC=(1

    H
    (GF(Xi

    X
    m)))η

    where,RRVi,mc is a retrieval relevance value of an ith media file to a mth search criteria basis media file based on a cth content based retrieval algorithm;

    xi is a quantitative characterization of the ith media file based on the cth content based retrieval algorithm;

    xm is a quantitative characterization of the mth search criteria basis media file based on the cth content based retrieval algorithm;

    GF is a distance function;

    H is a mapping function that maps an argument into a finite range; and

    η

    is a constant exponent;

    for each kth operator of the search string performing an operation specified by the kth operator on answer sets that are arguments of the kth operator to form a kth answer set for the kth operator;

    for each nth record in the kth answer set for each kth operator, assigning a retrieval relevance value to the nth record in the kth answer set, wherein the retrieval relevance value is a mathematical function of one or more quantitative characterizations associated with the nth record in answer sets that are arguments of the kth operator.

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