A Novel Model for the Print-and-Capture Channel in 2D Bar Codes

  • Alberto Malvido
  • Fernando Pérez-González
  • Armando Cousiño
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4105)


Several models for the print-and-scan channel are available in the literature. We describe a new channel model specifically tuned to the transmission of two-dimensional bar codes and which is suitable not only for scanners, but also for time/space-variant scenarios including web cameras or those embedded in mobile phones. Our model provides an analytical expression for accurately representing the output of the print-and-capture channel, with the additional advantage of directly estimating its parameters from the available captured image, and thus eliminating the need of painstaking training. A full communication system with a two-dimensional bar code has been implemented to experimentally validate the accuracy of the proposed model and the feasibility of reliable transmissions. These experiments confirm that the results obtained with our method outperform those obtained with existing models.


Mobile Phone Channel Model Symbol Error Probability Average Luminance Capture Device 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Alberto Malvido
    • 1
  • Fernando Pérez-González
    • 1
  • Armando Cousiño
    • 1
  1. 1.Dept. Teoría de la Señal y ComunicacionesUniversity of VigoVigoSpain

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