Character recognition method by time-frequency analyses using writing pressure

Tatsuhito Watanabe, Seiichiro Katsura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


With the development of information and communication technology, personal verification becomes more and more important. In the future ubiquitous society, the development of terminals handling personal information requires the personal verification technology. The signature is one of the personal verification methods; However, the number of characters is limited in the case of the signature and therefore false signature is used easily. Thus, personal identification is difficult from handwriting. This paper proposes a "haptic pen" that extracts the writing pressure, and shows a character recognition method by time-frequency analyses. Although the figures of characters written by different amanuenses are similar, the differences appear in the time-frequency domain. As a result, it is possible to use the proposed character recognition for personal identification more exactly. The experimental results showed the viability of the proposed method.

Original languageEnglish
Pages (from-to)498-504+14
Journalieej transactions on industry applications
Issue number4
Publication statusPublished - 2010


  • Character recognition
  • Force sensation
  • Haptic energy conversion
  • Human support system
  • Real-world haptics
  • Wavelet transformation

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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