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Spam fax filter

  • US 7,184,160 B2
  • Filed: 08/08/2003
  • Issued: 02/27/2007
  • Est. Priority Date: 08/08/2003
  • Status: Active Grant
First Claim
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1. A spam fax filter comprising:

  • a fax transformation processor configured to transform rasterized fax images into non-rasterized representations of fax images;

    a knowledge base of fax characteristics comprising at least one fax characteristic selected from the group consisting of spam characteristics and non-spam characteristics; and

    ,a comparator configured to compare non-rasterized representations of fax images produced by said fax transformation processor with at least one of said fax characteristics to detect spam fax in the spam fax filter;

    wherein said knowledge base comprises fax characteristics selected from the group consisting of a number of fax transmission pages, fax image intensity, and fax image patterns.

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