基于组合特征的小字符集脱机手写汉字识别方法

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1、AbstractAbstractItisdifficultforofflinehandwrittencharacterrecognitionbecauseofthecharacteristicsofunclearwritingandunnormativestrokesandsoon.ThisdissertationintroducesakindrecognitionmethodofofflinehandwrittencharacterbasedonintegratedfeaturesandHMM.Ontheaspectoffeatureextraction,thisdissertat

2、ionadoptstheintegratedfeaturesbasedonskeletondirectionalcharacteristicsandfeaturepoints.Themethoduseselasticmeshstrategytodividethethinnedcharacterimagewrittenbydifferentmanintomeshes,thenextractsfourkindsofkeypointfeaturesandfourkindsofskeletondirectionfeaturesofChinesecharactersimagewithinthe

3、grid.Finally,thethreefeaturevectorsofhandwrittenformChinesecharactersimagesareobtained:theoverallcharacteristics,horizontalfeaturesandtheverticalfeatures.Ontheaspectofthedesignintheclassifier,thisdissertationusesHMMtoclassify.BasedonindependentHMMclassifiers,weusethetraininghandwrittenChinesese

4、ttotraintheclassifiers.ThisdissertationusesvotingruletointegratetheHMMclassifiersandselectsthemaximumaveragesimilarityastherecognitionresultsinrecognition.Inthisdissertation,experimentalresultsbasedonspecifiedsmallcharactersetshowthatthemethodisfeasible.KeywordsOfflinehandwrittencharacterrecong

5、nitionElasticmeshesSkeletondirectionaldecompositionFeaturepointHMMII目录目录第1章引言........................................................................................................................11.1研究背景及意义.......................................................................................

6、..................11.2国内外研究现状.........................................................................................................21.3本文工作与组织结构.................................................................................................4第2章脱机手写汉字图像预处理....................................

7、....................................................62.1二值化处理.................................................................................................................62.2行字切分................................................