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System and method of enabling a cellular/wireless device with imaging capabilities to decode printed alphanumeric characters

  • US 20060098874A1
  • Filed: 11/04/2005
  • Published: 05/11/2006
  • Est. Priority Date: 11/08/2004
  • Status: Active Grant
First Claim
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1. A method for decoding printed alphanumeric characters from images or video sequences captured by a wireless device, the method comprising:

  • pre-processing the image or video sequence to optimize processing in all subsequent operations;

    searching one or more grayscale images for key alphanumeric characters on a range of scales;

    comparing the values on said range of scales to a plurality of templates in order to determine the characteristics of the alphanumeric characters;

    performing additional comparisons to a plurality of templates to determine character lines, line edges, and line orientation;

    processing information from prior said pre-processing, said searching, said comparing, and said performing additional comparisons, to determine the corrected scale and orientation of each line;

    recognizing the identity of each alphanumeric character in a string of such characters;

    decoding the entire character string in digitized alphanumeric format.

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