On-line Overlaid-Handwriting Recognition Based on Substroke HMMs

  • Authors:
  • Hiroshi Shimodaira;Takashi Sudo;Mitsuru Nakai;Shigeki Sagayama

  • Affiliations:
  • -;-;-;-

  • Venue:
  • ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 2
  • Year:
  • 2003

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Abstract

This paper proposes a novel handwriting recognition interfacefor wearable computing where users write characterscontinuously without pauses on a small single writingbox. Since characters are written on the same writingarea, they are overlaid with each other. Therefore thetask is regarded as a special case of the continuous characterrecognition problem. In contrast to the conventionalcontinuous character recognition problem, location informationof strokes does not help very much in the proposedframework. To tackle the problem, substroke based hiddenMarkov models (HMMs) and a stochastic bigram languagemodel are employed. Preliminary experiments were carriedout on a dataset of 578 handwriting sequences with acharacter bigram consisting of 1,016 Japanese educationalKanji and 71 Hiragana characters. The proposed methoddemonstrated promising performance with 69.2% of hand-writingsequences beeing correctly recognized when differentstroke order was permitted, and the rate was improvedup to 88.0% when characters were written with fixed strokeorder.