Nested state indexing in pairwise Markov networks for fast handwritten document image rule-line removal

  • Authors:
  • Huaigu Cao;Rohit Prasad;Premkumar Natarajan;Venu Govindaraju

  • Affiliations:
  • BBN Technologies, Cambridge, MA;BBN Technologies, Cambridge, MA;BBN Technologies, Cambridge, MA;CUBS, University at Buffalo, Amherst, NY

  • Venue:
  • ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
  • Year:
  • 2009

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Abstract

The Markov random field (MRF) has been applied to modeling the connectivity constraints of the text in document images for tasks like binarization and rule-line removal. One challenge of applying the MRF is its high computational cost. This paper presents a method using two nested set of states trained to reduce the computational cost of patch-based MRF. The two sets of states are trained at different levels in coarseto-fine order. We show effective reduction of run time but very little loss of quality using rule-line removal experiments.