Improving readability by modifying graphic QR code microstructure

Hsing Chih Liu, Tzren Ru Chou, Chun Shien Lu, Hsi Chun Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


White modules of quick response codes (QR codes) are degraded by dot gain, especially when printed at smaller sizes, which results in more false blacks than false whites in error analysis, and also severely affects decoding ability. To reduce the false blacks generated from printing and to improve code readability, modifying the microstructure of graphic QR codes by reducing the size of the information dots is proposed. Experimental results show that the resultant QR code reduces the number of false blacks and thus the error rate. This method applies to the physical output of both conventional and graphic QR codes.

Original languageEnglish
Pages (from-to)879-881
Number of pages3
JournalElectronics Letters
Issue number23
Publication statusPublished - 2021 Nov


  • Computer vision and image processing techniques
  • Microstructure
  • Optical storage and retrieval
  • error analysis
  • error correction
  • image processing
  • image recognition
  • printing
  • quick response codes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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