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High contrast retroreflective sheeting and license plates

  • US 9,145,098 B2
  • Filed: 10/05/2010
  • Issued: 09/29/2015
  • Est. Priority Date: 10/08/2009
  • Status: Active Grant
First Claim
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1. An optical character recognition system, comprising:

  • an optical character recognition camera;

    a light source emitting infra-red light that is coaxial with the optical character recognition camera; and

    a retroreflective sheeting comprising indicia including a light scattering material;

    wherein the light scattering material is a surface that has been selectively roughened;

    the retroreflective sheeting comprising indicia including light scatter material is irradiated using the light source and imaged using the optical character recognition camera thereby recognizing characters of the indicia.

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