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Method of and apparatus for reading a two-dimensional bar code symbol and data storage medium

  • US 20020020747A1
  • Filed: 04/06/2001
  • Published: 02/21/2002
  • Est. Priority Date: 04/06/2000
  • Status: Active Grant
First Claim
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1. A method of reading a two-dimensional bar code symbol having orientation modules and a finder pattern with a center point, the method comprising a data module search step for calculating position and shape information for all modules constituting the bar code symbol by calculating an orientation axis passing through an orientation module and the finder pattern center point in a scanned image of the bar code symbol based on finder pattern position, orientation module position, and orientation module shape information in the scanned image.

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