基于DSP的指纹采集系统毕业论文

吉林大学毕业设计（论文）-1-摘要本论文设计的是基于DSP的指纹采集系统设计与指纹图像预处理算法的研究与实现。基于数字信号处理器TMS320VC5502的指纹采集系统是以电容式固态指纹传感器FPS200来采集指纹，以数字信号处理器DSP为控制和计算核心，其中DSP模块由电源电路，复位电路，时钟电路，JTAG电路，外部存储器电路组成，然后通过CPLD器件为其外围逻辑电路，最终以USB的接口方式传给上位机。而所采集的指纹图像要通过图像的分割、指纹图像的二值化、指纹图像的细化等指纹图像预处理算法对原始图像进行预处理使之更清晰。先在指纹图像预处理过程中，提出了结合方差法和方向图法的分割方法。在指纹分割的基础上，选用了应用方向重心改进的二值化算法对分割后的指纹图像进行二值化操作。最后，本论文选择了OPTA细化算法对二值化后的指纹图像进行了细化。关键词：指纹采集系统,DSP,指纹图像预处理吉林大学毕业设计（论文）-2-AbstractThisthesisisthedesignoffingerprintacquisitionsystemdesignbasedonDSPandtheresearchandimplementationoffingerprintimagepreprocessingalgorithm.TMS320VC5502fingerprintacquisitionsystembasedondigitalsignalprocessingisbasedoncapacitancesensorforsolid-statefingerprintofFPS200tocollectfingerprints,thedigitalsignalprocessingforDSPisthecoreofcontrolandcalculation,andDSPmodulesbythepowersupplycircuit,resetcircuit,clock,JTAGcircuit,externalmemorycircuit,thenthroughCPLDdevicesregardasitsexternallogicalcircuit,ultimatelytoUSBinterfacetoPC.Throughthefingerprintimagesegmentation,fingerprintimagebinarization,thinningalgorithmforfingerprintimagepreprocessingpreprocesstheoriginalimageoffingerprintimagetomakeitclearer.Firstly,Intheprocessoffingerprintimagepreprocessing,itofferedamethodofcombiningvariancemethodandpatternofsegmentation.Basedonfingerprintsegmentation,itchoosesinthefocusofthedirectionoftheimprovedbinarizationalgorithmafterthefingerprintimagesegmentationtomakebinarization.Finally,inthisthesisIhaveselectedtheOPTAthinningalgorithmafterfingerprintimagesbinarizationtogoonthinning.KeyWords：FingerprintAcquisitionSystem,DSP,FingerprintImagePreprocessing吉林大学毕业设计（论文）-1-目录摘要.................................................................................................................................1Abstract....................................................................................................................................2引言.................................................................................................................................11绪论....................................................................................................................................21.1课题的背景及意义..................................................................................21.1.1课题的背景...................................................................................................21.1.2课题的意义...................................................................错误!未定义书签。1.2发展历史及国内外现状............................................错误!未定义书签。1.3生物识别技术简介....................................................错误!未定义书签。1.4指纹识别技术简介....................................................错误!未定义书签。1.5指纹识别技术相对于生物识别技术的优点.............错误!未定义书签。2硬件电路设计.......................................................................................错误!未定义书签。2.1系统总体方案设计....................................................错误!未定义书签。2.2指纹采集模块设计....................................................错误!未定义书签。2.2.1指纹传感器介绍..........................................................错误!未定义书签。2.2.2FPS200指纹传感器简介..........................................错误!未定义书签。2.2.3FPS200指纹传感器的硬件电路设计....................错误!未定义书签。2.3CPLD模块设计........................................................错误!未定义书签。2.3.1CPLD简介....................................................................错误!未定义书签。2.3.2CPLD硬件电路设计..................................................错误!未定义书签。2.4DSP硬件电路设计...................................................错误!未定义书签。2.4.1系统TMS320VC5502DSP芯片功能.......................错误!未定义书签。2.4.2电源模块设计..............................................................错误!未定义书签。2.4.3复位电路设计..............................................................错误!未定义书签。2.4.4时钟电路设计..............................................................错误!未定义书签。2.4.5JTAG接口电路设计....................................................错误!未定义书签。吉林大学毕业设计（论文）-2-2.4.6SDRAM接口电路设计..............................................错误!未定义书签。2.4.7Flash接口电路设计.....................................................错误!未定义书签。2.5USB模块设计...........................................................错误!未定义书签。3指纹图像预处理算法分析..................................................................错误!未定义书签。3.1预处理分析...............................................................错误!未定义书签。3.2指纹图像的分割........................................................错误!未定义书签。3.3指纹图像的二值化....................................................错误!未定义书签。3.4指纹图像的细化........................................................错误!未定义书签。4软件设计...............................................................................................错误!未定义书签。4.1CCS集成开发环境概述.............................................错误!未定义书签。4.2程序设计概述...........................................................错误!未定义书签。4.2.1DSP程序设计..............................................................错误!未定义书签。4.2.2FPS200程序设计........................................................错误!未定义书签。结论...................................................................................................错误!未定义书签。参考文献............................