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Research Unit Human-Computer Interaction, Institute for Medical Informatics, Statistics and Documentation, Medical University Graz, Auenbruggerplatz 2-V, A-8036 Graz, Austria


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Abstract Handwriting is an important modality for Human-Computer Interaction. For medical professionals, handwriting is still the preferred natural method of documentation. Handwriting recognition has long been a primary research area in Computer Science. With the tremendous ubiquity of smartphones, along with the renaissance of the stylus, handwriting recognition has become a new impetus. However, recognition rates are still not 100% perfect, and researchers still are constantly improving handwriting algorithms. In this paper we evaluate the performance of entropy based slant- and skew-correction, and compare the results to other methods. We selected 3700 words of 23 writers out of the Unipen-ICROW-03 benchmark set, which we annotated with their associated error angles by hand. Our results show that the entropy-based slant correction method outperforms a window based approach with an average precision of ±6.02° for the entropy-based method, compared with the ±7.85° for the alternative. On the other hand, the entropy-based skew correction yields a lower average precision of ±2:86°, compared with the average precision of ±2.13° for the alternative LSM based approach. View Full-Text

Keywords: entropy; handwriting recognition; point cloud data; preprocessing entropy; handwriting recognition; point cloud data; preprocessing

Autor: Andreas Holzinger 1,* , Christof Stocker 1, Bernhard Peischl 2 and Klaus-Martin Simonic 1

Fuente: http://mdpi.com/


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