Character and speech recognition research and its practical uses

Feature extraction and decision graph for handwritten character “8”

Fig.1 Feature extraction and decision graph for handwritten character “8”

Flow of mail address reading

Fig.2 Flow of mail address reading

Flow of telephone speech recognition

Fig.3 Flow of telephone speech recognition

  The human interface between human and machine becomes important year by year as the progress of information society. One of key technologies is the pattern recognition. We, human beings communicate each other mainly and naturally by use of patterns like character, speech, picture etc.

  Sadakazu Watanabe and Kunio Sakai have contributed to these human interface problems, especially character and speech recognition researches and its practical applications as pioneers.

  Sadakazu Watanabe has made researches on pattern recognition technologies for handwritten characters and speaker-independent speech recognition. He has developed the new technology, that is, the hybrid recognition one. The technology has been very useful for the postal code and address recognition and telephone speech recognition.

  Kunio Sakai has made researches on Kanji character (Chinese character) recognition. He has developed the new method for printed Kanji character, that is, hierarchical step classification. The method has been in practical uses as the OCR widely.

  As mentioned above, Sadakazu Watanabe and Kunio Sakai have made big contribution to human interface field.

  For this contribution, the IEICE gave the achievement award to Sadakazu Watanabe and Kunio Sakai in 1989.



Publications

[1] H. Genchi, K. Mori, S. Watanabe, and S. Katsuragi、Recognition of Handwritten Numerical Characters for Automatic Letter Sorting、1968、Proc. of IEEE, Vol.56, No.8, pp.1291-1301, 1968
[2] S. Watanabe, Y. Nakamura, M. Suda, K. Ohi, K. Yura, H. Sasaki, N. Takagi, and A. Tanaka、Kanji Character Recognition and its Application to Address Reading、1988、Proc. of Advanced Technology Conference, pp.828-841, 1988
[3] Y. Takebayashi, H. Shinoda, H. Asada, T. Nitta, S. Hirai, and S. Watanabe、Telephone Speech Recognition Using a Hybrid Method、1984、Proc. of IEEE International Conference on Pattern Recognition, pp.1232-1235, 1984

Related Researches

Category

Information Processing
(Human Information Processing)

Events in World

1989
Tiananmen Square incident arose. (China)
1989
The Berlin Wall was abolished. (Germany)
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