Proceedings of the Korea Society of Information Technology Applications Conference (한국정보기술응용학회:학술대회논문집)

The Korea Society of Information Technology Applications (한국정보기술응용학회)
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Active threshold design of PDF-417 two-dimensional bar-code

  • An, La-Yeon (A College of Information and Communication Daegu University) ;
  • Woo, Hong-Chae (A College of Information and Communication Daegu University) ;
  • Kim, Han-Yong (AD Information and Communication, Daegu University)
  • Published : 2005.11.25
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Abstract

In this paper, an algorithm to extract bar-space area is suggested. In a section of bar-code space area the threshold value is computed, and bar and space are extracted according to threshold value. PDF417 is used everyday life and printed in many different materials. The printed PDF417 is especially influenced by various light source. The decision of bar and space is very hard under the change of illumination. The fixed threshold value to distinguish the bar and space can not be applied. in these cases, The proposed algorithm is developed to investigate variable threshold. The variable threshold can be obtained by simple calculation.

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