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大连民族学院本科毕业设计（论文）基于MATLAB的指纹识别系统设计基于MATLAB的指纹识别系统设计-I-摘要生物识别技术已经成为身份识别和网络安全的发展技术之一，其中指纹识别技术是目前公认的安全，准确，方便的身份认证技术之一，使之成为人们研究的热点。本文主要设计一个基于matlab的指纹识别系统。首先主要介绍了指纹识别技术研究的背景，意义，及现状。其次，实现了指纹识别系统，描述了指纹识别系统的基本结构，并且对指纹图像的预处理、特征提取、特征匹配这三个必要的环节的算法进行了详细地研究，在指纹图像预处理阶段，本文使用基于灰度的算法对图像进行了分割，同时，针对二值化后图像中仍存在的噪声，也进行了相应的修整处理，尽可能的为以后指纹特征的提取打好基础，从而成功地实现了对指纹数字图像的处理、特征提取、保存和匹配等功能。最后，对指纹识别系统进行了仿真，仿真结果表明该系统可以较好的进行识别，准确率达到了95.1%。关键词：指纹识别；预处理；二值化；特征提取；特征匹配基于MATLAB的指纹识别系统设计-II-AbstractBiometrictechnologyhasbecomeoneofthedevelopingtechnologiesforidentityrecognitionandnetworksecurity.Andfingerprintidentificationtechnologyisnowrecognizedasoneofthemostsafe,accurateandconvenientauthenticationtechnologies,anditisafocusforresearchers.Thispaperdesignsamatlab-basedfingerprintrecognitionsystem.Thefirstintroducesthefingerprintrecognitiontechnologyresearchbackground,significance,andthestatusquo.Secondly,toachievefingerprintidentificationsystem,describesthebasicstructureofthefingerprintidentificationsystem,andthefingerprintimagepreprocessing,featureextraction,featurematchingthesethreeessentialaspectsofthealgorithmisstudiedindetailinthefingerprintimagepre-processingstagethisarticleusesanalgorithmbasedongrayimagesegmentationcarriedoutatthesametime,fortheimageafterbinarizationnoisestillexists,butalsoforthecorrespondingtrimmingprocess,asmuchaspossibleforthefuturelaythefoundationforfingerprintfeatureextractionandthussuccessfullyachievedfingerprintdigitalimageprocessing,featureextraction,storageandmatchingfunctions.Finally,thefingerprintidentificationsystemforsimulation,simulationresultsshowthatthesystemcanidentifyabetteraccuracyratereached95.1%.KeyWords：FingerprintRecognition；Processing；Binarization；FeatureExtraction；FeatureMatching基于MATLAB的指纹识别系统设计-III-目录摘要.....................................................................................................................................IAbstract......................................................................................................................................II1绪论........................................................................................................................................11.1本课题背景和意义.....................................................................................................11.2指纹识别技术研究现状.............................................................................................11.3本文的章节安排.........................................................................................................22指纹识系统设计.....................................................................................................................42.1指纹识别系统设计基本结构.....................................................................................42.2指纹图像分割.............................................................................................................42.2.1指纹图像分割介绍.........................................................................................42.2.2均值方差法....................................................................................................52.3指纹图像的细化.........................................................................................................62.3.1指纹图像细化的预处理.................................................................................62.3.2指纹图像细化方法计算................................................................................72.4指纹图像的特征提取.................................................................................................82.4.1指纹特征提取概述........................................................................................82.4.2指纹特征提取和去伪特征.............................................................................92.5指纹图像匹配方法..................................................................................................102.5.1指纹图像匹配介绍.......................................................................................102.6本章小结...................................................................................................................113仿真结果及其分析...............................................................................................................123.1仿真结果及分析.......................................................................................................123.2本章小结...................................................................................................................14结论..................................................................................................................................16参考文献............................................................................................................................17附录MATLAB程序..............................................................................................................18致谢..................................................................................................................................35基于MATLAB的指纹识别系统设计–1–1绪论1.1本课题背景和意义指纹识别技术的应用十分广泛，指纹因具有终生不变性及稳定性,而且不同人指纹相同的概率几乎为零,因此指纹自动识别系统被广泛应用于案例分析、商业活动中的身份鉴别等