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1、附 录附录A 外文资料TheresearchofdigitalimageprocessingtechniqueIntroductionInterestindigitalimageprocessingmethodsstemsfromtwoprincipalapplicationareas:improvementofpictorialinformationforhumaninterpretation;andprocessingofimagedataforstorage,transmission,andrepresentationforaut
2、onomousmachineperception.Thischapterhasseveralobjectives:(1)todefinethescopeofthefieldthatwecallimageprocessing;(2)togiveahistoricalperspectiveoftheoriginsofthisfield;(3)togiveanideaofthestateoftheartinimageprocessingbyexaminingsomeoftheprincipalareainwhichitisapplied;(4
3、)todiscussbrieflytheprincipalapproachesusedindigitalimageprocessing;(5)togiveanoverviewofthecomponentscontainedinatypic叭general-purposeimageprocessingsystem;and(6)toprovidedirectiontothebooksandotherliteraturewhereimageprocessingworknormallyisreporter.WhatIsDigitalImageP
4、rocessing?Animagemaybedefinedasatwo-dimensionalfunction,f(x,y)，wherexandyarespatial(plane)coordinates,andtheamplitudeoffatanypairofcoordinates(x,y)iscalledtheintensityorgrayleveloftheimageatthatpoint.Whenx,y,anddigitalimage.Tirefieldofdigitalimageprocessingreferstoproces
5、singdigitalimagesbymeansofadigitalcomputer.Notethatadigitalimageiscomposedofafinitenumberofelements,eachofwhichhasaparticularlocationandvalue.Theseelementsarereferredtoaspictureelements,imageelements,pels,andpixels.Pixelisthetermmostwidelyusedtodenotetheelementsofadigita
6、limage.Visionisthemostadvancedofoursenses,soitisnotsurprisingthatimagesplaythesinglemostimportantroleinhumanperception.However,unlikehumanwhoarelimitedtothevisualbandoftheelectromagnetic(E11)spectrum,imagingmachinescoveralmosttheentireEMspectrum,rangingfromgammatoradiowa
7、ves.Theycanoperateonimagesgeneratedbysourcesthathumanarenotaccustomedtoassociatingwithimage.theseincludeultrasound,electronmicroscopy,andcomputer-generatedimages.Thus,digitalimageprocessingencompassesawideandvariedfieldofapplication.Thereisnogeneralagreementamongauthorsr
8、egardingwhereimageprocessingstopsandotherrelatedareas,suchasimageanalysisandcomputervision,start,someti
