數(shù)字散斑圖像相關(guān)亞像素搜索算法的研究及應(yīng)用.pdf

1、天津大學(xué)碩士學(xué)位論文數(shù)字散斑圖像相關(guān)亞像素搜索算法的研究及應(yīng)用姓名：常一鳴申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：光學(xué)指導(dǎo)教師：唐晨20090901ABSTRACTABSTRACTDigitalimage／specklecorrelation(DISC)isoneofmodemphotometrictechnologiesDISChasbeenappliedinmanyfields，suchasnondestructivetesting，micro—s

2、caledeformationfieldmeasurement，deformationmeasurementinhightemperatureenvironment，electronicpackaging，aviation，aerospaceandSOonItsadvantagesareautomatic，non—contact，highprecisionandfullfieldThekeytoDISCiSsub—pixelsearch

3、algorithmScholarsfromvariouscountrieshavebeencommittedtOresearchinthisareaSubpixelsearchisactuallyakindofoptimizationproblemParticleSWalTlloptimizationisverysuitableforsubpixelsearch，foritishigh—precision，fastconvergence

4、andeasytoachieveArtificialneuralnetworksarecomplexnetworksystems，whicharesimulatedbyhumanbrainANNcouldprocessinformationparalleledandmakenon—linearconversion，anditisthefocusinthefieldofartificialintelligenceIthasbroadapp

5、licationprospectsinDISC，duetOitsstrongselflearningabilityThemaincontentsofthispaperarebasedontheapplicationofparticleswarmoptimization(PSO)andartificialneuralnetworks(ANN)indigitalspecklecorrelationtechnologyAcomputersim

6、ulationschemeisemployedtotestthereliabilityandstabilityofPSOforDISCinvarioussituations，andPSOforDISChasalsobeenappliedtomeasuretherigidbodytranslationandtheuniaxialtensileinpracticalexperimentsInthispaperANNisalsoapplied

7、toDISCThroughbeingtrainedwiththeresultscalculatedwiththecorrelationalgorithm，ANNestablishestherelationshipbetweenthecoordinatesofpointsandthedisplacementvaluesofthemAsaresult，ANNcouldcalculatethedisplacementvaluesofother

8、pointsComparedwiththemethodthatusescorrelationalgorithmdirectlyANNcouldnotonlycalculatemorequicklybutalsocouldcalculatethevaluesofthepointsthatisontheedgeofthespeckleimagesKEYWORDS：Digitalimage／specklecorrelation，particl