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Image finder method and apparatus for pixography and other photo-related reproduction applications

  • US 6,980,698 B2
  • Filed: 07/22/2002
  • Issued: 12/27/2005
  • Est. Priority Date: 07/22/2002
  • Status: Expired due to Fees
First Claim
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1. A method for identifying a source image data file from which a printed image has been generated, said method comprising:

  • (a) subsampling input image data to derive input correlation data values related to a printed input image;

    (b) receiving source image data that represent a source image data file stored in a source image database;

    (c) subsampling said source image data to obtain source correlation data values;

    (d) performing a correlation operation between the input correlation values and the source correlation values to obtain a correlation result value (t);

    (e) identifying the source image data file of said source image database as a match data file if a correlation result value (t) associated with said source image data file is greater than or equal to a select threshold.

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