# A METHOD FOR HANDWRITTEN CHARACTERS RECOGNITION BASED ON A VECTOR FIELD

### Tetsuya Izumi, Tetsuo Hattori, Hiroyuki Kitajima, Toshinori Yamasaki

#### Abstract

In order to obtain a low computational cost method for automatic handwritten characters recognition, this paper proposes a combined system of two rough classification methods based on features of a vector field: one is autocorrelation matrix method, and another is a low frequency Fourier expansion method. In each method, the representation is expressed as vectors, and the similarity is defined as a weighted sum of the squared values of the inner product between input pattern and the reference patterns that are normalized eigenvectors of KL ( Karhunen-Loeve) expansion. This paper also describes a way of deciding the weight coefficients based on linear regression, and shows the effectiveness of the proposed method by illustrating some experimentation results for 3036 categories of handwritten Japanese characters.

#### References

- Masato S. et al., 2001. A Discriminant Method of Similar Characters with Quadratic Compound Function, IEICE Transactions, Vol.J84-D2, No.8, pp.1557- 1565, Aug. 2001 (in Japanese).
- Takashi N. et al., 2000. Accuracy Improvement by Compound Discriminant Functions for Resembling Character Recognition, IEICE Transactions, Vol.J83- D2, No.2, pp.623-633, Feb. 2000 (in Japanese).
- Kazuhiro S. et al., 2001. Accuracy Improvement by Gradient Feature and Variance Absorbing Covariance Matrix in Handwritten Chinese Character Recognition, IEICE Transactions, Vol.J84-D2, No.11, pp.2387-2397, Nov. 2001 (in Japanese).

#### Paper Citation

#### in Harvard Style

Izumi T., Hattori T., Kitajima H. and Yamasaki T. (2004). **A METHOD FOR HANDWRITTEN CHARACTERS RECOGNITION BASED ON A VECTOR FIELD** . In *Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO,* ISBN 972-8865-12-0, pages 417-420. DOI: 10.5220/0001149004170420

#### in Bibtex Style

@conference{icinco04,

author={Tetsuya Izumi and Tetsuo Hattori and Hiroyuki Kitajima and Toshinori Yamasaki},

title={A METHOD FOR HANDWRITTEN CHARACTERS RECOGNITION BASED ON A VECTOR FIELD},

booktitle={Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO,},

year={2004},

pages={417-420},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0001149004170420},

isbn={972-8865-12-0},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO,

TI - A METHOD FOR HANDWRITTEN CHARACTERS RECOGNITION BASED ON A VECTOR FIELD

SN - 972-8865-12-0

AU - Izumi T.

AU - Hattori T.

AU - Kitajima H.

AU - Yamasaki T.

PY - 2004

SP - 417

EP - 420

DO - 10.5220/0001149004170420