Abstract
This paper presents a dual classifier handprinted character recognition system that is implemented using Radial Basis Function (RBF) networks. Each classifier in the system extracts a different set of features from the input character and makes its own indpendent classification decision. The features used are the diagonal and partitioned radial projections, and the four-directional edge maps of the mage. The system then combines these decisions before giving a final classification output. Several different methods of desinging the combiner are examined. The proposed system is tested on a database of handprinted alphanumeric characters, and the results are fourd to be very promising.
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Govindan VK, Shivaprasad AP. Character recognition—a review. Pattern Recognition 1990; 23: 671–683
Trier OD, Jain AK, Taxt T. Feature extraction methods for character recognition—a survey. Pattern Recognition 1996; 29(4): 641–662
Kundu A, Yang H, Bahl P. Recognition of handwritten word: first and second order hidden. Markov model based aproach. Pattern Recognition 1989; 22(3): 283–297
Bose CB, Kuo SS. Connected and degraded text recognition using hidden Markov model. Pattern Recognition 1994; 27(10): 1345–1363
Chen MY, Kundu A, Srihari SN. Variable duration hidden Markov model and morphological segmentation for handwritten word recognition. IEEE Transactions on Image Processing 1995; 4(12): 1675–1688
Vlontzos JA, Kung SY. Hidden Markov models for character recognition. IEEE Transactions on Image Processing 1992; 1(4): 539–543
Park HS, Lee SW. Off-line recognition of large-set handwritten characters with multiple hidden Markov models. Pattenr Recognition 1996; 29(2): 231–244
Kim WS, Park RH. Off-line recognition of handwritten Korean and alphanumetic characters using hidden Markov models. Pattern Recognition 1996; 29 (5): 845–858
Knerr S, Personnaz L, Dreyfus G. Handwritten digit recognition by neural networks with single-layer training. IEEE Transactions on Neural Networks 1992; 3(6): 962–968
Burges CJC et al. Off line recognition of handwritten postal words using nerual networks. International Journal of Pattern Recognition and Artificial Intelligence 1993; 7(4): 689–704
Gupta A et al. An intergrated architecture for recognition of totally unconstrained handwritten numerals. International Journal of Pattern Recognition and Artificial Intelligence 1993; 7(4): 757–773
Lee SW. Multilayer cluster neural network for totally unconstrained handwriten numeral recognition. Neural Networks 1995; 8(5): 783–792
Suen CY et al. Computer recognition of unconstrained hand written numerals. Proceedings of the IEEE 1992; 80(7): 1162–1180
Xu L, Krzyzak A, Suen CY. Methods of combining multiple classfiers and their applications to handwriting recognition. IEEE Transactions on Systems, Man and Cybernetics 1992; 22(3): 418–435
Lam L, Suen CY: Optimal combinations of patern classifiers. Pattern Recognition Letters 1995; 16(9): 945–954
Huang YS, Suen CY. A method of combining multiple experts for the recognition of unconstrained handwritten numerals. IEEE Transactions on Pattern Analysis and Machine Intelligence 1995; 17(1): 90–94
Musavi MT et al. On the training of radial basis function classifiers. Neural Networks 1992; 5: 595–603
Wettscherek D, Dietterich T. Improving the performance of radial basis function networks by learning center locations. Advances in Neural Information Processing Systems 1992; 4: 1133–1140
Albert A. Regression and the Moore-Penrose Pseudoinverse. Academic Press, 1972
Cheng HD, Xia DC. A novel parallel approach to character recognition and its VLSI implementation. Pattern Recognition 1996: 29(1): 97–119
Duda RO, Hart PE. Pattern Classification and Scene Analysis. Wiley, 1973
Prewitt JMS. Object enhancement and extraction. In Picture Processing and Psychopictorics, Lipkin B, Rosenfeld A. (eds). Academic Press, 1970; 75–149
Kirsh R. Computer determination of the constituent structure of biological images. Computers in Biomedical Research 1971; 4: 315–328
Chen YS, Hsu WH. A modified fast parallel algorithm for thinning digital patterns. Pattern Recognition Letters 1988; 7: 99–106
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Chim, Y.C., Kassim, A.A. & Ibrahim, Y. Dual classifier system for handprinted alphanumeric character recognition. Pattern Analysis & Applic 1, 155–162 (1998). https://doi.org/10.1007/BF01259365
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DOI: https://doi.org/10.1007/BF01259365
