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1、附 录附录A 外文资料TheresearchofdigitalimageprocessingtechniqueIntroductionInterestindigitalimageprocessingmethodsstemsfromtwoprincipalapplicationareas:improvementofpictorialinformationforhumaninterpretation;andprocessingofimagedataforstorage,transmission,andrepresentationforautonomousmachineperception.
2、Thischapterhasseveralobjectives:(1)todefinethescopeofthefieldthatwecallimageprocessing;(2)togiveahistoricalperspectiveoftheoriginsofthisfield;(3)togiveanideaofthestateoftheartinimageprocessingbyexaminingsomeoftheprincipalareainwhichitisapplied;(4)todiscussbrieflytheprincipalapproachesusedindigit
3、alimageprocessing;(5)togiveanoverviewofthecomponentscontainedinatypic叭general-purposeimageprocessingsystem;and(6)toprovidedirectiontothebooksandotherliteraturewhereimageprocessingworknormallyisreporter.WhatIsDigitalImageProcessing?Animagemaybedefinedasatwo-dimensionalfunction,f(x,y)，wherexandyar
4、espatial(plane)coordinates,andtheamplitudeoffatanypairofcoordinates(x,y)iscalledtheintensityorgrayleveloftheimageatthatpoint.Whenx,y,anddigitalimage.Tirefieldofdigitalimageprocessingreferstoprocessingdigitalimagesbymeansofadigitalcomputer.Notethatadigitalimageiscomposedofafinitenumberofelements,
5、eachofwhichhasaparticularlocationandvalue.Theseelementsarereferredtoaspictureelements,imageelements,pels,andpixels.Pixelisthetermmostwidelyusedtodenotetheelementsofadigitalimage.Visionisthemostadvancedofoursenses,soitisnotsurprisingthatimagesplaythesinglemostimportantroleinhumanperception.Howeve
6、r,unlikehumanwhoarelimitedtothevisualbandoftheelectromagnetic(E11)spectrum,imagingmachinescoveralmosttheentireEMspectrum,rangingfromgammatoradiowaves.Theycanoperateonimagesgeneratedbysourcesthathumanarenotaccustomedtoassociatingwithimage.theseincludeultrasound,electronmicroscopy,andcomputer-gene
7、ratedimages.Thus,digitalimageprocessingencompassesawideandvariedfieldofapplication.Thereisnogeneralagreementamongauthorsregardingwhereimageprocessingstopsandotherrelatedareas,suchasimageanalysisandcomputervision,start,someti
