Dissertation
Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Character recognition devices

Design and Implementation of Online Handwritten Nǚshu Characters Recognition System

Author LiYunChao
Tutor WangJiangQing
School Central South University for Nationalities
Course Applied Computer Technology
Keywords Nǚshu Online handwritten recognition Structure feature Featureextraction Classifier
CLC TP391.43
Type Master's thesis
Year 2013
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Nǚshu is the unique surviving characters and an ancient literature in the world.Therefore, we must take advantage of the information technology to protect it. As areal-time recognition method, online handwritten recognition has high efficiency ofrecognition and characters could be recognized when naturally written on ahandwritten board, which plays an important role in protecting this precious culturalheritage. In addition, there are so many kinds of words in Nǚshu and appears to bevery artistic and peculiar that gives rise to be recognized difficultly. The research onthe online handwritten Nǚshu character recognition has a very important theoreticaland social role.According to the problem of online handwritten Nǚshu character recognition,some works have been carried out after anglicizing the characteristics of onlinehandwritten Nǚshu characters. We design a root-radical-stroke-based onlinehandwritten character recognition classifier and implement a stable online handwrittencharacter recognition system which has been put into use effetely.The main research work and features in this thesis are as follows:1) In the light of the characteristics of online handwritten Nǚshu characters, wepropose a structure-based recognize method and design a root-radical-stroke-basedonline handwritten character recognition classifier;2) Linear normalization method has been used for preprocessing. As a result of somany curved strokes in Nǚshu character, we propose an improved secondary searchmethod and combine with the line approximation method to extract feature points forstroke recognition by dynamic programming into stroke feature dictionary, then applythe connected domain into radical segmentation, rearrange the stroke order for radicalrecognizing, and utilize the long stroke feature and the strokes clustering informationto classify the Structure of roots in Nǚshu character. Finally, we make use of theradical and root mapping into recognition; other in-depth technology has beenresearched in this paper, such as distinction of similar characters, broken andconnected strokes.3) The experimental results show that the first-time recognition rate in ourapproach has been increased by16.4%than the ordinary online handwritten characterrecognition method based on strokes and stroke order; the ten-time recognition ratecould be reached as high as96.5%.

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