介绍数字图像处理 毕业论文外文文献翻译

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

2、rocessingremainsachallengingdomainofprogrammingforseveralreasons.Firsttheissueofdigitalimageprocessingappearedrelativelylateincomputerhistory.Ithadtowaitforthearrivalofthefirstgraphicaloperatingsystemstobecomeatruematter.Secondly,digitalimageprocessingrequiresthemostcarefuloptimiz

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

4、s44100(samplespersecond)x2(bytespersampleperchannel)x2(channels)=176Ko/sec,whichis50timesless.Obviouslywewillnotbeabletousethesametechniquesforbothaudioandimagesignalprocessing.Finally,digitalimageprocessingisbydefinitionatwodimensionsdomain;thissomehowcomplicatesthingswhenelabora

5、tingdigitalfilters.Wewillexploresomeoftheexistingmethodsusedtodealwithdigitalimagesstartingbyaverybasicapproachofcolorinterpretation.Asamoreadvancedlevelofinterpretationcomesthematrixconvolutionanddigitalfilters.Finally,wewillhaveanoverviewofsomeapplicationsofimageprocessing.Theai

6、mofthisdocumentistogivethereaderalittleoverviewoftheexistingtechniquesindigitalimageprocessing.Wewillneitherpenetratedeepintotheory,norwillweinthecodingitself;wewillmoreconcentrateonthealgorithmsthemselves,themethods.Anyway,thisdocumentshouldbeusedasasourceofideasonly,andnotasasou

7、rceofcode.2.Asimpleapproachtoimageprocessing(1)Thecolordata:Vectorrepresentation①BitmapsTheoriginalandbasicwayofrepresentingadigitalcoloredimageinacomputer'smemoryisobviouslyabitmap.Abitmapisconstitutedofrowsofpixels,contractionofthewords“PictureElement”.Eachpixelhasaparticularval

8、uewhichdeterminesitsappearingcolo