介绍数字图像处理 毕业论文外文翻译

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1、附录1外文原文Source:"the21stcenturyliteraturetheappliedundergraduateelectroniccommunicationseriesofpracticalteachingplanTheinformationandcommunicationengineeringspecialtyinEnglishch02_1.PDF120-124Ed:HanDingZhaoJuMin,etcTextA:AnIntroductiontoDigitalImageProcessing1.IntroductionDigitalimagep

2、rocessingremainsachallengingdomainofprogrammingforseveralreasons.Firsttheissueofdigitalimageprocessingappearedrelativelylateincomputerhistory.Ithadtowaitforthearrivalofthefirstgraphicaloperatingsystemstobecomeatruematter.Secondly,digitalimageprocessingrequiresthemostcarefuloptimizati

3、onsespeciallyforrealtimeapplications.Comparingimageprocessingandaudioprocessingisagoodwaytofixideas.Letusconsiderthenecessarymemorybandwidthforexaminingthepixelsofa320x240,32bitsbitmap,30timesasecond:10Mo/sec.Nowwiththesamequalitystandard,anaudiostereowaverealtimeprocessingneeds44100

4、(samplespersecond)x2(bytespersampleperchannel)x2(channels)=176Ko/sec,whichis50timesless.Obviouslywewillnotbeabletousethesametechniquesforbothaudioandimagesignalprocessing.Finally,digitalimageprocessingisbydefinitionatwodimensionsdomain;thissomehowcomplicatesthingswhenelaboratingdigit

5、alfilters.Wewillexploresomeoftheexistingmethodsusedtodealwithdigitalimagesstartingbyaverybasicapproachofcolorinterpretation.Asamoreadvancedlevelofinterpretationcomesthematrixconvolutionanddigitalfilters.Finally,wewillhaveanoverviewofsomeapplicationsofimageprocessing.Theaimofthisdocum

6、entistogivethereaderalittleoverviewoftheexistingtechniquesindigitalimageprocessing.Wewillneitherpenetratedeepintotheory,norwillweinthecodingitself;wewillmoreconcentrateonthealgorithmsthemselves,themethods.Anyway,thisdocumentshouldbeusedasasourceofideasonly,andnotasasourceofcode.2.Asi

7、mpleapproachtoimageprocessing(1)Thecolordata:Vectorrepresentation①BitmapsTheoriginalandbasicwayofrepresentingadigitalcoloredimageinacomputer'smemoryisobviouslyabitmap.Abitmapisconstitutedofrowsofpixels,contractionofthewords“PictureElement”.Eachpixelhasaparticularvaluewhichdeterminesi

8、tsappearingc