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Character recognition based on non-linear multi-projection profiles measure

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Abstract

In this paper, we study a method for isolated handwritten or hand-printed character recognition using dynamic programming for matching the non-linear multi-projection profiles that are produced from the Radon transform. The idea is to use dynamic time warping (DTW) algorithm to match corresponding pairs of the Radon features for all possible projections. By using DTW, we can avoid compressing feature matrix into a single vector which may miss information. It can handle character images in different shapes and sizes that are usually happened in natural handwriting in addition to difficulties such as multi-class similarities, deformations and possible defects. Besides, a comprehensive study is made by taking a major set of state-of-the-art shape descriptors over several character and numeral datasets from different scripts such as Roman, Devanagari, Oriya, Bangla and Japanese-Katakana including symbol. For all scripts, the method shows a generic behaviour by providing optimal recognition rates but, with high computational cost.

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Correspondence to K. C. Santosh.

Additional information

K C Santosh is currently a research fellow at the US National Library of Medicine (NLM), National Institutes of Health (NIH), USA. Before this, K C worked as a postdoctoral research scientist at the Université de Lorraine — LORIA (UMR-7503) Campus Scientifique and ITESOFT, France. He earned his PhD in Computer Science from INRIA Nancy Grand Est, Université de Lorraine, France in 2011, MS in information technology by research and thesis from the school of ICT, SIIT, Thammasat University, Thailand in 2007, and BS in electronics and communication from PU, Nepal, in 2003. His research interests include document image analysis, document information content exploitation, biometrics (such as face) and (bio)medical image analysis.

Laurent Wendling received the PhD in computer science from the University of Paul Sabatier, Toulouse, France in 1997. He received the HDR degree in 2006. From 1993 to 1999, he was with the IRIT in the field of pattern recognition. From 1999 to 2009, he was an assistant professor at the ESIAL Nancy, and a member of LORIA in the field of symbol recognition. His current research topics are spatial relation, feature selection, and image segmentation. He is currently a full professor at the Paris Descartes University, in the field of computer science. He is also the group leader of the SIP team, LIPADE.

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Santosh, K.C., Wendling, L. Character recognition based on non-linear multi-projection profiles measure. Front. Comput. Sci. 9, 678–690 (2015). https://doi.org/10.1007/s11704-015-3400-2

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