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1、HMM-basedfacerecognitionsystemembeddedintheandroidintheresearchanditsapplicationKeywords:HMMfacerecognitionembeddedARM90IntroductionEmbeddedfacerecognitionsystemandcomparedtothetraditionalsystemofidentificationhasastrongadvantage,nospecialacquisitionequipment,lowcost,
2、simpletouse;thesametime,facerecognitiondoesnotinterferewiththeuser,doesnotinfringetheprivacyofusers,areinitiativetoidentifynon-infringement,easyforuserstoaccessthismainlineofembeddedARM9systemdevelopmenttothetheoreticalbasisoftheHMM,showscompleteimagecapture,facedetec
3、tionandrecognitionfunctionscorrespondingtothehardwareplatformandsoftwaremodulesdesignedtoandimplementationprocess;andimagepre-processingisoptimizedtodofloating-pointarithmetic,greatlyincreasingthespeedofembeddedsystems.Partofthesystemsoftwarecanbedirectlyappliedwithth
4、eLinuxoperatingsystemforsmartphones,theuseofmobilephonesandbuilt-incamera,apersonalfacialfeaturedatacanbeanalyzedandthenstoredincontrasttotheinitialfaceinformationdatabase,completetheidentificationfunction.1AsystemarchitectureanddesignThesystemusestheSamsungintroduced
5、theARM920TRISCprocessorkernel-S3C2410A.Itsexcellentprocessingperformanceshouldbeviewedasthefirstchoiceforthedevelopmentofportabledevices.Atthesametimetomeetthesmartphonesonthevideoimageacquisitionneeds,thesystemusesaUSBbus-basedvideoacquisitionmodule,andgreatlyimprove
6、dcomparedtotheserialtransmissionofdataacquisitionrates.Thesysteminvolvesdigitalimageacquisition,processing,storage,transmissionandHMMalgorithmsandothertechniques.ThesystemarchitectureshowninFigure1.2imageacquisitionhardwaredesignInviewofthetraditionalhighcostCCDimages
7、ensor,therelativecomplexityoftheadditionalcircuitryandhighpowerconsumption,thesystemusesOmniVision'sOV7640CMOSchipasthecompany'simagesensor.OV7640isalowvoltage(2.5V),highsensitivityCMOSimagesensor.Real-timeacquisitionandstoragesystemsneedhigh-speeddatatransmission,the
8、systemhardwarewiththequestionputforwardhigherrequirements.Thesystemdesign,partsacquisitionandtransmissionpartsinbetweenwitht
