Segmentation of unconstrained handwritten numeral strings using the continuation property

Sungsoo Yoon; Gyeonghwan Kim; Yeongwoo Choi; Yillbyung Lee

doi:10.1117/12.410856

21 December 2000 Segmentation of unconstrained handwritten numeral strings using the continuation property

Sungsoo Yoon, Gyeonghwan Kim, Yeongwoo Choi, Yillbyung Lee

Proceedings Volume 4307, Document Recognition and Retrieval VIII; (2000) https://doi.org/10.1117/12.410856
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

The digit string recognition differs from that of isolated digits because it requires segmentation of a given string into individual digits. However, a proper segmentation requires a priori knowledge of the patterns that form meaningful units, which implies recognition capability. Therefore segmentation and recognition are not different things, rather one thing composed of two procedures with mutual dependencies. In this paper, we propose a new approach to segment the unconstrained handwritten numeral strings without the explicit guessing of break points. To segment the string of digits naturally, we adopt the concept of continuation and introduce the technique of subgraph matching to predefined prototypes. This approach makes an explicit segmentation unnecessary because it does not guess the possible break positions and also it possible to recognize a digit even if strokes not belonging to digit are attached to it. The correct segmentation rate of our method for 20 handwritten numerical strings belonging to NIST database is 97.5%.

Citation Download Citation

Sungsoo Yoon, Gyeonghwan Kim, Yeongwoo Choi, and Yillbyung Lee "Segmentation of unconstrained handwritten numeral strings using the continuation property", Proc. SPIE 4307, Document Recognition and Retrieval VIII, (21 December 2000); https://doi.org/10.1117/12.410856

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