对图像边缘检测算法的研究学术报告中英文翻译.docx
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对图像边缘检测算法的研究学术报告中英文翻译.docx
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对图像边缘检测算法的研究学术报告中英文翻译
ToimageedgeexaminationalgorithmresearchacademicreportAbstract
Inimageprocessing,asabasiccharacteristic,theedgeoftheimage,whichiswidelyusedintherecognition,segmentation,intensificationandcompressoftheimage,isoftenappliedtohigh-leveldomain.Therearemanykindsofwaystodetecttheedge.Ingeneral,therearetwomaintechniques:
oneisclassicmethodbasedonthegraygradeofeverypixel;theotheroneisbasedonwaveletanditsmulti-scalecharacteristic.Thefirstmethod,whichisgotthelongestresearch,getstheedgeaccordingtothevarietyofthepixelgray.ThemaintechniquesareRobert,Laplace,Sobel,CannyandLOGalgorithm.Thesecondmethod,whichisbasedonwavelettransform,utilizestheLipschitzexponentcharacterizationofthenoiseandsingularsignalandthenachievesthegoalofremovingnoiseanddistillingtherealedgelines.Inrecentyears,anewkindofdetectionmethod,whichbasedonthephaseinformationofthepixel,isdeveloped.Weneedhypothesizenothingaboutimagesinadvance.Theedgeiseasytofindinfrequencydomain.It'sareliablemethod.Inchapterone,wegiveanoverviewoftheimageedge.Andinchaptertwo,someclassicdetectionalgorithmsareintroduced.Thecauseofpositionalerrorisanalyzed,andthendiscussedamoreprecisionmethodinedgeorientation.Inchapterthree,wavelettheoryisintroduced.Thedetectionmethodsbasedonsamplingwavelettransform,whichcanextractmaimedgeoftheimageeffectively,andnon-samplingwavelettransform,whichcanremaintheoptimumspatialinformation,arerecommendedrespectively.Inthelastchapterofthisthesis,thealgorithmbasedonphaseinformationisintroduced.UsingthelogGaborwavelet,two-dimensionfilterisconstructed,manykindsofedgesaredetected,includingMachBand,whichindicatesitisaoutstandingandbio-simulationmethod.Hopingalltheworkinthispaperisofsomevaluetoresearchandapplicationsofimageedgedetection.
Theimageedgeisoneofimagemostbasiccharacteristics,ofteniscarryingimagemajorityofinformation.Buttheedgeexistsintheimageirregularstructureandinnotthesteadyphenomenon,alsonamelyexistsinthesignalpointofdiscontinuityplace,thesespotshavegiventheimageoutlineposition,theseoutlinesarefrequentlywewhentheimageryprocessingneedstheextremelyimportantsomerepresentativecondition,thisneedsustoexamineandtowithdrawitsedgetoanimage.Buttheedgeexaminationalgorithmisintheimageryprocessingquestiononeofclassicaltechnicaldifficultproblems,itssolutioncarriesonthehighlevelregardingusthecharacteristicdescription,therecognitionandtheunderstandingandsoonhasthesignificantinfluence;Alsobecausetheedgeexaminationallhasinmanyaspectstheextremelyimportantusevalue,thereforehowthepeoplearedevotingcontinuouslyinstudyandsolvethestructuretoleavehavethegoodnatureandthegoodeffectedgeexaminationoperatorquestion.Intheusualsituation,wemaythesignalinsingularpointandthepointofdiscontinuitythoughtisintheimageperipheralpoint,itsnearbygradationchangesituationmayreflectfromitsneighboringpictureelementgradationdistributiongradient.Accordingtothischaracteristic,weproposedmanykindsofedgeexaminationoperator:
IfRobertoperator,Sobeloperator,Prewittoperator,Laplaceoperatorandsoon.Thesemethodsmanyarewaitingfortheprocessingpictureelementtocarryonthegradationanalysisforthecentralneighborhoodachievementthefoundationrealizedandhasalreadyobtainedthegoodprocessingeffecttotheimageedgeextraction.Butthiskindofmethodsimultaneouslyalsoexistshastheedgepictureelementwidth,thenoisejammingisseriousandsoontheshortcomings,evenifusessomeauxiliarymethodstoperformthenoiseremoval,alsocorrespondingcanbringtheflawwhichtheedgefuzzyandsoonovercomeswithdifficulty.Alongwiththewaveletanalysisappearance,itsgoodtimefrequencypartialcharacteristicbythewidespreadapplicationintheimageryprocessingandinthepatternrecognitiondomain,becomesinthesignalprocessingthecommonlyusedmethodandthepowerfultool.Throughthewaveletanalysis,mayinterweavedecomposesinthesameplaceeachkindofcompositesignalthedifferentfrequencytheblocksignal,butcarriesontheedgeexaminationthroughthewavelettransformation,mayuseitsmulti-criteriaandthemulti-resolutionnaturefully,realeffectiveexpressestheimagetheedgecharacteristic.Whenthewavelettransformationcriterionreduces,ismoresensitivetotheimagedetail;Butwhenthecriterionincreases,theimagedetailisfilteredout,theexaminationedgewillbeonlythethickoutline.Thischaracteristicisextremelyusefulinthepatternrecognition,wemaybecalledthisthickoutlinetheimagethemainedge.Ifwillbeableanimagemainedgeclearintegrityextraction,thistothegoaldivision,therecognitionandsoonfollowingprocessingtobringtheenormousconvenience.Generallyspeaking,theabovemethodallistheworkwhichdoesbasedontheimageluminanceinformation.Inthemultitudinousscientificresearchworkerunder,hasobtainedtheverygoodeffectdiligently.But,becausetheimageedgereceivesphysicalconditionandsoontheilluminationinfluencesquitetobebigabove,oftenenablesmanytohaveacommonshortcomingbasedonbrightnessedgedetectionmethod,thatistheedgeisnotcontinual,doesnotsealup.Consideredthephaseinformationintheimageimportanceaswellasitsstablecharacteristic,causesusingthephaseinformationtocarryontheimageryprocessingintonewresearchtopic.Inthispapersoonintroducesonekindbasedonthephaseimagecharacteristicexaminationmethod--phaseuniformmethod.Itisnotusestheimagetheluminanceinformation,butisitsphasecharacteristic,namelysuppositionimageFouriercomponentphasemostconsistentspotachievementcharacteristicpoint.Notonlyitcanexaminebrightnesscharacteristicsandsoonstepcharacteristic,linecharacteristic,moreovercanexamineMachbeltphenomenonwhichproducesasaresultofthehumanvisionsensationcharacteristic.Becausethephaseuniformitydoesnotneedtocarryonanysuppositiontotheimagecharacteristictype,thereforeithastheverystrongversatility.
Theimagemajoritymaininformationallexistsintheimageedge,themainperformancefortheimagepartialcharacteristicdiscontinuity,isintheimagethegradationchangequitefierceplace,alsoisthesignalwhichweusuallysaidhasthestrangechangeplace.Thestrangesignalthegradationchangewhichmovestowardsalongtheedgeisfierce,usuallywedividetheedgeforthestepshapeandtheroofshapetwokindoftypes.Inthestepedgetwosidegreylevelshavetheobviouschange;Buttheroofshapeedgeislocatedthegradationincreaseandthereducedintersectionpoint.Mayportraytheperipheralpointinmathematicsusingthegradationderivativethechange,tothestepedge,theroofshapeedgeasksitsstep,thesecondtimederivativeseparately.Toanedge,hasthepossibilitysimultaneouslytohavethestepandthelineedgecharacteristic.Forexampleonasurface,changesfromaplanetothenormaldirectiondifferentanotherplanecanproducethestepedge;Ifthissurfacehastheedgesandcornerswhichtheregularreflectioncharacteristicalsotwoplanesformquitetobesmooth,thenworksaswhenedgesandcornerssmoothsurfacenormalaftermirrorsurfacereflectionangle,asaresultoftheregularreflectioncomponent,canproducethebrightlightstripontheedgesandcornerssmoothsurface,suchedgelookedlikehaslikelysuperimposedalineedgeinthestepedge.Becauseedgepossibleandinsceneobjectimportantcharacteristiccorrespondence,thereforeitistheveryimportantimagecharacteristic.Forinstance,anobjectoutlineusuallyproducesthestepedge,becausetheobjectimageintensityisdifferentwiththebackgroundimageintensity.
Thepaperselectedtopicoriginatesinholdstheimportantstatusandthefunctionpracticalapplicationtopicintheimageproject.Theso-calledimageprojectdisciplineisrefersfoundationdisciplineandsoonmathematics,opticsprinciples,thedisciplinewhichintheimageapplicationunifieswhichaccumulatesthetechnicalbackgrounddevelops.Theimageprojectscontentareextremelyrich,andsoondividesintothreelevelsdifferentlyaccordingtotheabstractdegreeandtheresearchtechnique:
Imageryprocessing,imageanalysisandimageunderstanding.Theimagedivisionisinbetweentheimageanalysisandtheimageryprocessing,itsmeaningis,theimagedivisionisfromtheimageryprocessingtotheimageanalysisessentialstep,alsoisfurtherunderstandstheimagethefoundation.Theimagedivisionhastheimportantinfluencetothecharacteristic.Theimagedivisionandbasedonthedivisiongoalexpression,thecharacteristicextractionandtheparametersurveyandsoontransformstheprimitiveimageasamoreabstractmorecompactform,causesthehigh-levelimageanalysisandpossiblyunderstandsinto.Buttheedgeexaminationistheimagedivisioncorecontent;thereforetheedgeexaminationholdstheimportantstatusandthefunctionintheimageproject.Thereforetheedgeexaminationresearchalwaysisintheimageengineeringresearchthehotspotandthefocalpoint,moreoverthepeopleenhanceunceasinglytoitsattentionandtheinvestment.
Weknewthat,theedgeexaminationessenceisusessomealgorithmtowithdrawintheimagetheobjectandthebackgroundjunctiondemarcationline.Wedefinetheedgefortheimageinthegradationoccurtherapidchangeregionboundary.Theimageg
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- 对图像边缘检测算法的研究学术报告 中英文翻译 图像 边缘 检测 算法 研究 学术报告 中英文 翻译
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