TI 的指纹识别技术解决方案

WhitePaperSPRA894A–May20031DSPforSmartBiometricSolutionsRamSathappanDigitalSignalProcessorGroupABSTRACTBiometricsisthescienceofmeasuringandstatisticallyanalyzingbiologicaldata.Ininformationtechnology,biometricsreferstotheuseofaperson’sbiologicalcharacteristicsforpersonalidentificationandauthentication.Fingerprint,iris-scan,retinal-scan,voiceprint,signature,handprintandfacialfeaturesaresomeofthemostcommontypesofhumanbiometrics.Digitalsignalprocessors(DSPs),whicharespeciallydesignedsingle-chipdigitalmicrocomputersthatprocesselectricalsignalsgeneratedbyelectronicsensors(e.g.,cameras,fingerprintsensors,microphones,etc.),willhelptorevolutionizethisworldofbiometrics.Thecoreofthebiometricauthenticationprocessismadeupofimageprocessingandpatternmatchingorminutiaecomparisonalgorithms.AndtheprogrammableDSP,withanarchitecturewell-suitedforimplementingcomplexmathematicalalgorithms,canefficientlyaddressalltheprocessingneedsofsuchasystem.ThefollowinginformationintroducestheconceptofacompletebiometricssystemsolutionbasedonTexasInstruments(TI)semiconductorcomponents,developmenttools,andsoftwaresolutions.Additionally,thevariousconceptsthatoutlinetheinherentadvantagesofaDSPinabiometricsystem-betteraccuracy,fasterrecognitionandlowercost,allleadingtosmarterbiometrics-willalsobecovered.SPRA8942DSPforSmartBiometricSolutionsContents1Introduction.....................................................................................................................................32BiometricsSystem..........................................................................................................................42.1SensingElement.......................................................................................................................42.2ProcessingElement..................................................................................................................52.3StorageElement........................................................................................................................52.4InterfaceElement......................................................................................................................63CompleteSystemSolution.............................................................................................................64DSPforSecureandTrustedBiometrics.......................................................................................74.1SecureStandaloneDevice........................................................................................................74.2TrustedNetworkDevice............................................................................................................95BiometricSystemExamples........................................................................................................105.1TMS320VC5509DSP-BasedBiometricFingerprintSolution..................................................105.2TMS320DM642DMP-BasedBiometricSmartCamera...........................................................116Summary........................................................................................................................................12AppendixATMS320DigitalSignalProcessorPlatform...................................................................13AppendixBeXpressDSPDevelopmentTools...................................................................................14CodeComposerStudio...................................................................................................................14DSKandEVM.................................................................................................................................14Third-PartyNetwork........................................................................................................................14Third-PartyBiometricSolutions.......................................................................................................15FiguresFigure1.TotalBiometricsMarketRevenues(World),2000-2006.......................................................3Figure2.BiometricsSystemElements................................................................................................4Figure3.CompleteBiometricSystemSolution...................................................................................7Figure4.UseofDSPasaSecureStandaloneDevice.......................................................................8Figure5.UseofDSPasaTrustedNetworkDevice............................................................................9Figure6.TMS320C5509DSP-BasedFingerprintBiometricSolution...............................................10Figure7.TMS320DM642DMP-BasedBiometricSmartCamera......................................................11Figure8.TexasInstrumentsTMS320DSPPlatforms.......................................................................13SPRA894DSPforSmartBiometricSolutions31IntroductionImaginehowconvenientitwouldbetoactivatethesecurityalarmatyourhomewiththetouchofa