Camera-based Kanji OCR for mobile-phones: practical issues

Author

Koga, Masashi ; Mine, Ryuji ; Kameyama, Tatsuya ; Takahashi, Toshikazu ; Yamazaki, Masahiro ; Yamaguchi, Teruyuki

Author_Institution

Hitachi Central Res. Lab., Tokyo, Japan

fYear

2005

fDate

29 Aug.-1 Sept. 2005

Firstpage

635

Abstract

A camera based optical character reader (OCR) for Japanese Kanji characters was implemented on a mobile phone. This OCR has three key features. The first is discriminative feature extraction (DFE) which enables a character classifier needing only small memory size. The second is a word segmentation method specially designed for looking up Japanese words in a dictionary. The third feature is a GUI suitable for a mobile phone. A prototype mobile phone Kanji OCR was constructed and experimentally tested. Recognition accuracy of over 95% was obtained under the best conditions, which shows the potential of our prototype as a new type of electronic dictionary.

Keywords

feature extraction; image segmentation; mobile handsets; optical character recognition; Japanese Kanji characters; camera-based Kanji OCR; character classification; discriminative feature extraction; mobile phones; optical character reader; word segmentation; Application software; Cameras; Dictionaries; Feature extraction; Graphical user interfaces; Laboratories; Optical character recognition software; Prototypes; Research and development; Software prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Document Analysis and Recognition, 2005. Proceedings. Eighth International Conference on

ISSN

1520-5263

Print_ISBN

0-7695-2420-6

Type

conf

DOI

10.1109/ICDAR.2005.65

Filename

1575622