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284Vol.28NO．4JChongqingTechnolBusinessUniv.NatSciEd20118Aug.20111672－058X201104－0390－044000672010－12－192011－02－23．1977－．ARM9。、。PCAARM9TP216A1。1．1PCAPrincipalComponentsAnalysisPCAK－LK－L。1。。1．2PCAixi。x1x2…xn12。D3Dn×pp4KKp×p。x=1nΣni=1xi1yi=xi－x2D=y0y1…yn－13K=DTD=1nΣni=1yiyTi4Kλiνi。。。λm5。S=v1v2…vm5Sp×m。。1．3PCAx1x2…xn珋x、。N'N'＜N。、、。。x6。。dExwk=x－wkTx－wk槡622。。341。1PC。6。122。S3C2410FLASHSDRAMLED。FLASHSDRAM。、、。1934ARM9ARM9SDRAM60MSDRAM。、、SDRAM。。ARM9URATARM9RJ45PCPC。3ARM963。31FLASHSDRAM。pmmeanfacetpleyetplPmMeanFacetEyet。PCFlash。2CCDfdata。3。。、、、。4。Meanpm。PCA。5。6。。。。。FRR。FAR7-9。4ARM9CMOSPCA。7．461s98．5%1．25%。293281YANGJZHANGDVYANGJY．TWODimensionalPCAANewApproachtoAppearance－basedFaceRepresentationandRecognitionJ．IEEETrans．PatternAnal．MachineIntell2004261131-1372．J．．201023827-283．WinCEJ．20093258-2624．USBJ．20096558-5625．M．20096．PC/104J．2010242-437．SOPCJ．201125491-968．J．201125497-1019．J．20062744667-4673DesignandImplementationofDoorSecuritySystemBasedonFaceRecognitionZHUChao-pingSchoolofComputerScienceandInformationEngineeringChongqingTechnologyandBusinessUniversityChongqing400067ChinaAbstractFaceRecognitiontechnologyisthecompositeapplicationofbiotechnologyandcomputertechnologythedemandforsafetyandreliabilityofaccesscontrolsystembecomeshigherandhigherinmarket．ThedesignschemeofdoorsecuritysystembasedonARM9waspresented．Firstlyeffectivefeatureswereselectedandthealgorithmoffacedetectionandrecognitionwasbrieflyintroducedthenaccordingtotheimplementingprincipleofthealgorithmthedesignschemeofhardwaresystemwasdescribedindetail．Finallythealgorithmwastransplantedontothehardwaresystemthencontrolsoftwarewasdevelopedandimbeded-styleandrapiddoorsecuritysystembasedonfacerecognitionsystemwasimplemented．Theexperimentalresultsdemonstratethatthesystemworksreliablyandspeedlyandthefunctionofdoorsecuritysystemwasrealized．KeywordsfacerecognitionPCAARM9doorsecuritysystem3934