Online handwritten mathematical expression recognition
Büyükbayrak , Hakan and Yanıkoğlu, Berrin and Erçil, Aytül (2007) Online handwritten mathematical expression recognition. In: Document Recognition and Retrieval XIV: IS&T/SPIE International Symposium on Electronic Imaging (SPIE 2007), San Jose, California, USA
Official URL: http://dx.doi.org/10.1117/12.704043
We describe a system for recognizing online, handwritten mathematical expressions. The system is designed with a user-interface for writing scientific articles, supporting the recognition of basic mathematical expressions as well as integrals, summations, matrices etc. A feed-forward neural network recognizes symbols which are assumed to be single-stroke and a recursive algorithm parses the expression by combining neural network output and the structure of the expression. Preliminary results show that writer-dependent recognition rates are very high (99.8%) while writer-independent symbol recognition rates are lower (75%). The interface associated with the proposed system integrates the built-in recognition capabilities of the Microsoft’s Tablet PC API for recognizing textual input and supports conversion of hand-drawn figures into PNG format. This enables the user to enter text, mathematics and draw figures in a single interface. After recognition, all output is combined into one LATEX code and compiled into a PDF file.
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