Two-tier architecture for unconstrained handwritten character recognition

K. V. Prema, N. V. Subba Reddy

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In this paper, we propose an approach that combines the unsupervised and supervised learning techniques for unconstrained handwritten numeral recognition. This approach uses the Kohonen self-organizing neural network for data classification in the first stage and the learning vector quantization (LVQ) model in the second stage to improve classification accuracy. The combined architecture performs better than the Kohonen self-organizing map alone. In the proposed approach, the collection of centroids at different phases of training plays a vital role in the performance of the recognition system. Four experiments have been conducted and experimental results show that the collection of centroids in the middle of the training gives high performance in terms of speed and accuracy. The systems developed also resolve the confusion between handwritten numerals.

Original languageEnglish
Pages (from-to)585-594
Number of pages10
JournalSadhana - Academy Proceedings in Engineering Sciences
Issue numberPART 5
Publication statusPublished - 01-12-2002

All Science Journal Classification (ASJC) codes

  • General


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