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METHOD FOR DECODING A LINEAR BAR CODE

  • US 20120256001A1
  • Filed: 12/21/2009
  • Published: 10/11/2012
  • Est. Priority Date: 12/21/2009
  • Status: Active Grant
First Claim
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1. A method for decoding a linear barcode in an image, by a sensor having a set of pixels, the method comprising:

  • a) selecting a predetermined scanning line, comprising a first ordered set of pixels, in which each pixel is identified by a first index and has a respective intensity value;

    b) decoding said barcode by constructing a profile of said barcode from intensity values of said pixels of said predetermined scanning line;

    c) obtaining a second set of scanning lines, which also comprises said predetermined scanning line, in which said scanning lines are ordered according to a second index and each scanning line comprises a respective first set of pixels for defining a third set of pixels, each identified by said first index and by said second index; and

    d) selecting a fourth ordered set of pixels from said third set of pixels and constructing an oversampled profile of said barcode by ordering intensity values calculated from intensity values of said pixels of said fourth set, said fourth set of pixels comprising pixels of said predetermined scanning line and further pixels of said third set that do not belong to said predetermined scanning line, to obtain a subpixel resolution that is able to decode said barcode.

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