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Encoding Used in the Real World


  • Graphic identifier representing a set of information, consisting of black bars and white spaces of unequal width, arranged according to different code formats
  • International standards
  • EAN-13 used to identify a specific retail product type, 13 digits
  • Code 39 used in industrial applications, 39 characters
  • Code 128 used in the health industry, blood banking, and electronics manufacture, 128 characters
  • Online Barcode Reader

QR code

  • A black and white graphic that records the data symbol information according to certain rules with a specific geometric figure
  • Recording data symbol information in a black and white pattern in a step-by-step manner with a certain geometry
  • Stacked/Row QR Code: Code 16K, Code 49, PDF417
  • Matrix QR Code: QR Code