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Scanner Authentication

  • US 20080044096A1
  • Filed: 06/11/2007
  • Published: 02/21/2008
  • Est. Priority Date: 06/12/2006
  • Status: Abandoned Application
First Claim
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1. A method of creating a signature for an article, the method comprising:

  • illuminating regions of the article sequentially by light at non-normal incidence;

    detecting light reflected from the surface of each region of the article; and

    processing signals representative of the reflected light from each region, the signals being indicative of a surface roughness of the region, to determine a signature for the article.

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