95 articles 

inria-00108312, version 1

Semi-Continuous HMMs with Explicit State Duration Applied to Arabic Handwritten Word Recognition

Abdallah Benouareth () 1, Abdellatif Ennaji () 2, Mokhtar Sellami () 1

Tenth International Workshop on Frontiers in Handwriting Recognition (2006)

Abstract: The goal of this paper is to describe an off-line segmentation-free Arabic handwritten words recognition system. This system is based on a semi-continuous 1- dimensionnal hidden Markov models (SCHMMs) with explicit state duration of different kinds (Gauss, Poisson and Gamma). First preprocessing is applied to simplify the feature extraction process, then the word image is analyzed from right-to-left, by using a sliding window approach, in order to extract from it a vectors sequence of statistical and structural features. The extracted sequence is submitted to a SCHMMs classifier based on a likelihood criterion for identifying the word using a modified version of the Viterbi algorithm. Several experiments were performed using the IFN/ENIT benchmark database, they showed, on the one hand, a considerable improvement in the recognition rate when SCHMMs with explicit state duration of either discrete or continuous distribution are used instead of standard SCHMMs (i.e. with implicit state duration), on the other hand, the Gamma distribution for the state duration, that have given the best recognition rate (90.89 % in top 1), seems more suitable for the SCHMMs based modeling of Arabic handwriting.

  • 1:  Laboratoire de Recherche en Informatique (LRI-ANNABA)
  • Université Badji Mokhtar
  • 2:  Perception, Systèmes, Information (PSI)
  • CNRS : FRE2645 – Université de Rouen – Institut National des Sciences Appliquées [INSA] - Rouen
  • Domain : Computer Science/Document and Text Processing
    Computer Science/Computer Vision and Pattern Recognition
  • Keywords : Semi-continuous HMMs – semi-continuous with explicit state duration – modified Viterbi algorithm
  • Comment : http://www.suvisoft.com
 
  • inria-00108312, version 1
  • oai:hal.inria.fr:inria-00108312
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  • Submitted on: Friday, 20 October 2006 14:05:58
  • Updated on: Friday, 20 October 2006 15:40:07