Patterns: Their Storage, Retrieval, and Comparison

    Volume 32, Issue 5 (September 1987)

    ISSN: 0022-1198


    Published Online: 1 September 1987

    Page Count: 12

    Lewis, MJ
    Forensic scientist, Home Office Forensic Science Laboratory, Chorley, Lancashire

    (Received 8 July 1986; accepted 17 November 1986)


    It is recognized that the unique definition of a complex pattern in terms of a numerical descriptor is an unrealistic objective; yet the need exists for an efficient means of handling such information in a variety of fields. A simple procedure is described for abstraction of the essential characteristics of a pattern into a format suitable for automated searching of large reference collections, and potentially, for the interlaboratory exchange of this information. The index developed embodies two distinct aspects of a pattern: “intrinsic” information content (I) and “hierarchical” information (H), calculated on up to 15 of the pattern's elements; the descriptors relate respectively to weighted relative magnitudes and arrangement of elements within the pattern. Significantly, the index is designed to be immune from variability in longitudinal dimensions, both absolute and relative, and to provide for versatile and intelligent searching of a data base.

    Paper ID: JFS11179J

    DOI: 10.1520/JFS11179J

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    Title Patterns: Their Storage, Retrieval, and Comparison
    Symposium , 0000-00-00
    Committee E30