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1、完一整论文指纹识别算法研究摘要随着计算机和网络的迅速发展,人们对身份认证的准确性、安全性与实用性提出了更高的耍求。基于生物特征识别的智能身份认证技术也逐渐受到广泛的关注。在众多的生物识别技术中,指纹识别技术是发展最早、应用最广泛的一种。指纹识别技术充分利用了指纹的普遍性、唯一性和永久性的生物特征,已逐步取代了传统的基丁标志和数字的识别方式,冃前在网络、银行、金融、医疗和安检等行业均得到了广泛丿应用。本文对指纹识别系统的原理和基本过程进行了分析研究,重点研究了指纹图像预处理算法,并且进行了验证。在指纹图像预处理部分,论文对预处理的各个步骤包括规格化、图像分割、中值滤波、二值化、细化等以及各
2、个步骤的方法进行了深入的分析和研究,选择了一种图像预处理方案。在指纹特征提取部分,采用基于Matlab实现的指纹细节特征提取方法,并给岀了去伪算法。指纹特征提取是从细化后的指纹图中得到细节特征点(即端点和分叉点),此特征点含有大量的伪特征,既耗时乂影响匹配精度。采用了边缘去伪和距离去伪,使得特征点去伪前后减小了近1/3,然后提取可靠特征点信息,以便实现指纹匹配。在指纹匹配部分,木文采用基于细节点的指纹匹配算法,并进行研究。关键词指纹识别;预处理;特征提取;匹配FingerprintRecognitionAlgorithmAbstractWiththerapidProgressofcomp
3、uterscienceandnetworktechnique,Anaccurate,secureandpracticaltechnologyofPersonalidentificationbecomesmoreandmoreimportant.TechnologyofPersonalidentificationbasedonBiometricshasreceivedextensiveattention.TechnologyofFingerprintrecognitionistheearliestoneandisappliedwidelyinthealltechniquesofbiomet
4、ricsrecognition,thenistakingfulladvantageoftheuniversality,uniquenessandpermanencyofthefingerprint,andgraduallyhastakenplaceoftraditionalidentificationmethodthatisbasedonsymbolandnumber.Nowadaysthetechnologyoffingerprintidentificationisfullyusedinnetwork,bank,finance,insuranceandsecurity.Thispape
5、rresearchthebasicprinciplesandprocessofthefingerprintidentificationsystem,andfocusonthepreprocessingalgorithmsoffingerprintimageandfinallyverify.Inthefingerprintimageprocessingsection,thesisonpreprocessingstepsincludingspecifications,imagesegmentation,medianfiltering,binarization,refinement,ands
6、oon,andeachstepofthewaytoin-depthanalysisandresearch,isanimageprocessingprogram・Partofthefingerprintfeatureextraction,fingerprint-basedMatlabimplementationdetailsoffeatureextractionmethods,andgivestothepseudoalgorithm.Fingerprintfeatureextractionisrefinedtogetthedetailsoffingerprintfeaturepoints
7、(theendpointandbifurcationpoints),thisfeaturepointscontainalargenumberoffalsefeatures,time-consumingandwillaffectthematchingaccuracy.Usedandthedistancetotheedgeofthefalseandcounterfeit,makesthefeaturepointstoreducethef