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Method for transparent marking of digital images for storage, retrieval and processing within a computer database

  • US 6,466,209 B1
  • Filed: 12/07/1995
  • Issued: 10/15/2002
  • Est. Priority Date: 12/07/1995
  • Status: Expired due to Fees
First Claim
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1. A method for including additional data within a stored digital image, said digital image comprising an array of pixels, each pixel having pixel property values such as intensity values, hue values and saturation values associated therewith;

  • the method comprising the steps of;

    identifying a constant content image region within said digital image, the pixels within said constant content image region each having a first pixel intensity value;

    determining a second pixel intensity value slightly different from said first pixel property value, the difference between said first and second pixel property values being indiscernible by the human eye; and

    storing said additional data within said constant content image region, said additional data being stored with said second pixel intensity value.

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