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ID:37478599
大小:6.74 MB
页数:132页
时间:2019-05-24
《金融票据圆形印鉴真伪识别方法研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、天津大学博士学位论文金融票据圆形印鉴真伪识别方法研究姓名:朱均超申请学位级别:博士专业:光学工程指导教师:刘铁根20070701础上,检测圆形印鉴的区域边缘。确定SS和MS之问的边缘对应关系后,采用改进Hausdorff距离计算其相似性,将其作为印鉴的真伪识别特征。为减小印鉴的质量对识别结果的影响,把边缘对应关系作为印鉴质量测度,采用神经网络方法进行综合分析、判别。实验表明,其识别率大于95%。5、算法在基于DSP的嵌入式系统中的实验与测试。采用高速的DSP作为主处理器,设计、制作了嵌入式圆形印鉴图像采集、处理系统,编写了实验和测试软件,对识别算法在DSP中进行实验和测试。实验结果表明,该算
2、法可以在基于DSP的嵌入式系统中有效的进行圆形印鉴真伪识别,识别速度为1秒左右。在验证算法有效性的同时,也分析了算法各环节的处理速度,为算法的进一步优化和改进提供了依据。关键词:金融票据,圆形印鉴,印鉴识别,图像处理,嵌入式系统,数字信号处理器,模式识别nAbstractSealplaysallessentialroleinidentilyingentitystatus.Particularly,asausualmethod,itproveslaweffectoffmancialnotesstampedwithseal.Inmostcases.therecognitionofsealisco
3、mpletedwithfoldingsealindiagonalandaligningmanually.Theaccuracyofrecognitionresultdependsonmail.madedecisionandgfiftcrimesalwayshappenwithcounterfeitfinancialseal,whicharethereasonswemanagetoreaserehanotheruniquemethodtosolvethisproblem.Hence,Asealverificationsystemisstudiedinthispaper,basedonembed
4、dedsystemtechnology.nlerecognitionmethodforcirclesealoffinancenotesisdiscoveredfromtheviewofsystem,andaseriesofrecognitionalgorithmsfromimageadjustment,preprocess,featureextractiontoestimationareproposed.Basedonhigh.speedDSP.theembeddedimageacquiringandprocessingsystemisdesignedandfabricated.Experi
5、mentally,therecognitionalgorithmsiScarriedout.Thefollowingsarethemainresearchcontents:1.Imageaberrationadjustment.Thefactorsleadingtoaberrationareanalyzed.andamodelofaberrationandreconstructionisestablishedandiSusedforreconstructionadjustmentofaberratedimage.AsectiontwopointsimageadjustmentmethodiS
6、proposedtosolvethenonuniformaberrationresultingfromluminancedistributionofLEDlightsource.combiningwitlI也eoutputcharacterofCMoSimagesensor.Asfarasgeome:ricaberrationisconcerned.meshtemplateimageobtainedwithpolynomialfittingisusedforgeometricaberrationparameterdeterminationofsystemandthelitheparamete
7、rs&reusedingeometricadjustmentandgrayinterpolationforimagereconstruction.2.ResearchandimplementofROI(RegionofInteresting)extractionalgorithmofcircleseal.Theredsealisselectedasresearchsample.Thissealisproces
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