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Optical Code Scanner Optimized for Reading 2D Optical Codes

  • US 20150144693A1
  • Filed: 11/22/2013
  • Published: 05/28/2015
  • Est. Priority Date: 11/22/2013
  • Status: Active Grant
First Claim
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1. A method of operating an optical code scanner implemented by a digital processor within the optical code scanner, the method comprising:

  • capturing an image from the item scanning area of the optical code scanner;

    generating a sequence of reduced resolution images from the captured image wherein each successive generated image has a lower resolution than the prior image;

    enhancing the contrast of the lowest resolution generated image not previously enhanced to improve the quality of the image;

    identifying a region of interest in the enhanced generated image with the highest resolution wherein the region of interest includes an optical code candidate;

    modifying a portion of the captured image that corresponds to the identified region of interest to correct for geometrical distortion; and

    recovering optical code data from the optical code candidate located in the modified portion of the captured image.

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