Applications of hidden Markov models in bar code decoding

Authors:
S. Krešić-Jurić;D. Madej;Fadil Santosa
Affiliations:
Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture, University of Split, Rudjera Boškovića b.b., 21000 Split, Croatia;Symbol Technologies, One Symbol Plaza, Holtsville, NY 11742-1300, United States;School of Mathematics, University of Minnesota, 127 Vincent Hall, 206 Church St. SE, Minneapolis, MN 55455, United States
Venue:
Pattern Recognition Letters
Year:
2006

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Abstract

We present a novel approach to edge detection in bar code signals using a hidden Markov model (HMM). We also present an algorithm for selection of an optimal filter scale used in smoothing the data. Experimental results show that the proposed HMM is superior in performance compared with existing algorithms in commercial scanners.