TY - JOUR
T1 - Structure extraction from decorated characters using multiscale images
AU - Omachi, Shi N.ichiro
AU - Inoue, Masaki
AU - Aso, Hirotomo
N1 - Funding Information:
This research was partially supported by the Ministry of Education, Science, Sports, and Culture, Grant-in-Aid for Encouragement of Young Scientists, 10780216, 1998. A part of this paper appeared in [24].
PY - 2001/3
Y1 - 2001/3
N2 - Decorated characters are widely used in various documents. Practical optical character reader is required to deal with not only common fonts but also complex designed fonts. However, since the appearances of decorated characters are complicated, most general character recognition systems cannot give good performances on decorated characters. In this paper, an algorithm that can extract character's essential structure from a decorated character is proposed. This algorithm is applied in preprocessing of character recognition. The proposed algorithm consists of three procedures: global structure extraction, interpolation of structure, and smoothing. By using multiscale images, topographical features, such as ridges and ravines are detected for structure extraction. Ridges are used for extracting global structure and ravines are used for interpolation. Experimental results show character structures are clearly extracted from very complex decorated characters.
AB - Decorated characters are widely used in various documents. Practical optical character reader is required to deal with not only common fonts but also complex designed fonts. However, since the appearances of decorated characters are complicated, most general character recognition systems cannot give good performances on decorated characters. In this paper, an algorithm that can extract character's essential structure from a decorated character is proposed. This algorithm is applied in preprocessing of character recognition. The proposed algorithm consists of three procedures: global structure extraction, interpolation of structure, and smoothing. By using multiscale images, topographical features, such as ridges and ravines are detected for structure extraction. Ridges are used for extracting global structure and ravines are used for interpolation. Experimental results show character structures are clearly extracted from very complex decorated characters.
KW - Character recognition
KW - Decorated character
KW - OCR
KW - Structure extraction
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U2 - 10.1109/34.910884
DO - 10.1109/34.910884
M3 - Article
AN - SCOPUS:0035280022
VL - 23
SP - 315
EP - 322
JO - IEEE Transactions on Pattern Analysis and Machine Intelligence
JF - IEEE Transactions on Pattern Analysis and Machine Intelligence
SN - 0162-8828
IS - 3
ER -