GENERATING NEW SAMPLES FROM HANDWRITTEN NUMERALS BASED ON POINT CORRESPONDENCE

This paper describes a character generation method based on point correspondence between patterns. The number of training samples used in constructing a recognition dictionary strongly affects its recognition performance. Unfortunately, it\\\\\\'s so time­consuming to gather large new samples that it is more useful to generate new samples from a few original ones. The character generation method proposed herein is based on the point correspondence between each sample and the template derived from all samples. The proposed method can automatically generate new samples that appear to be written naturally and extends the handwriting deforma­ tion seen in the original samples. Initial experiments show that using the samples so generated can improve the recognition performance.

[1]  Peter E. Hart,et al.  Nearest neighbor pattern classification , 1967, IEEE Trans. Inf. Theory.

[2]  Henry S. Baird,et al.  Document image defect models and their uses , 1993, Proceedings of 2nd International Conference on Document Analysis and Recognition (ICDAR '93).

[3]  K. Ishii,et al.  Generation of distorted characters and its applications , 1983 .

[4]  Kenichiro Ishii Design of a recognition dictionary using artificially distorted characters , 1990, Systems and Computers in Japan.

[5]  Tin Kam Ho,et al.  Large-Scale Simulation Studies in Image Pattern Recognition , 1997, IEEE Trans. Pattern Anal. Mach. Intell..

[6]  Norihiro Hagita,et al.  Model for selectively increasing learning sample number in character recognition , 1996, Electronic Imaging.

[7]  Ihsin T. Phillips How to extend and bootstrap an existing data set with real-life degraded images , 1999, Proceedings of the Fifth International Conference on Document Analysis and Recognition. ICDAR '99 (Cat. No.PR00318).

[8]  Akira Suzuki,et al.  On-line cursive Kanji character recognition as stroke correspondence problem , 1995, Proceedings of 3rd International Conference on Document Analysis and Recognition.

[9]  Fumitaka Kimura,et al.  Modified Quadratic Discriminant Functions and the Application to Chinese Character Recognition , 1987, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[10]  R. Casey Moment normalization of handprinted characters , 1970 .