Bayesian Network Modeling of Strokes and their Relationships for On-line Handwriting Recognition

  • Authors:
  • Affiliations:
  • Venue:
  • ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
  • Year:
  • 2001

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Abstract

Abstract: It is important to model strokes and their relationships for on-line handwriting recognition, because they reflect character structures. We propose to model them explicitly and statistically with Bayesian networks. A character is modeled with stroke models and their relationships. Strokes, parts of handwriting traces that are approximately linear, are modeled with a set of point models and their relationships. Points are modeled with conditional probability tables and distributions for pen status and X, Y positions in the 2-D space, given the information of related points. A Bayesian network is adopted to represent a character model, whose nodes correspond to point models and whose arcs their dependencies. The proposed system was tested on the recognition of on-line handwriting digits. It showed higher recognition rates than the HMM based recognizer with chaincode features and was comparable to other published systems.