Multitrack bar code and associated decoding method
Bar code reader
Omnidirectional bar code reader using virtual scan of video raster scan memory Patent #: 5124537
ApplicationNo. 851493 filed on 03/16/1992
US Classes:235/462.09, 2-D bar code235/462.11Including an imager (e.g., CCD or camera-type reader)
ExaminersPrimary: Dolinar, Andrew M.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG06K 007/10
AbstractA method and apparatus for decoding a two-dimensional bar code symbol using a charge-coupled device (CCD) camera or a charge-modulation device (CMD) camera. The CCD/CMD camera takes pictures of the symbol and the picture is converted into digital data. The location and orientation of the two-dimensional bar code symbol is determined and verified. Defects and damages on the symbol are detected and corrected. The symbol is scanned to read the codewords of the two-dimensional bar code symbol.