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Omnidirectional bar code reader using virtual scan of video raster scan memory

  • US 5,124,537 A
  • Filed: 10/29/1990
  • Issued: 06/23/1992
  • Est. Priority Date: 10/29/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for reading a bar code symbol, said apparatus comprising:

  • a memory;

    means for capturing a two dimensional image;

    means for storing said captured two dimensional image in said memory, said stored two dimensional image containing an image of a bar code symbol anywhere within the field of view of said stored two dimensional image;

    means for partitioning said memory into a plurality of memory segments;

    means for simultaneously scanning in each of said plurality of memory segments of said memory through said stored two dimensional image in a virtual scan pattern corresponding to a desired scanning pattern to provide a plurality of virtual scanning pattern outputs;

    means coupled to said plurality of virtual scanning pattern outputs for simultaneously processing said stored two dimensional image in each of said plurality of memory segments in order to read out information contained in said stored two dimensional image of said bar code symbol;

    wherein said means for partitioning said memory into a plurality of memory segments comprises means for interleaving said memory so that a single memory access at one address corresponds a plurality of image pixels respectively corresponding to more than one of said plurality of memory segments.

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