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ID:57020649
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页数:35页
时间:2020-07-26
《电子信息类专业英语第7章・・.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、UnitSevenImagesandTelevisionsPassageAFundamentalConceptsPassageBCompression/DecompressionTechniquesPassageCTelevisionPassageAFundamentalConceptsComputationalimageprocessingcanbedefinedastheoperationofmathematicalfunctionsonnumericrepresentationsofpictorialscenes.Ingeneralitispartofanoverallprocess
2、ofvisualperception,patternrecognitionandimageunderstanding.Theseformtheessentialcomponentsofcomputervision.Fortunatelyimageprocessingisconceptuallyrathersimplerthanmanyofthecognitiveprocessesassociatedwithcomputervisionandhasbeenthesubjectofrathermorepracticalandsuccessfuleffort.Whilstitmaybeofsci
3、entificinteresttoexploitmathematicsinthepursuitofperception,theobjectivebasisofimageprocessingistoapplyanalgorithmtoarepresentation(usuallydigital)ofavisualscenetoproducefollowingresults.[1]·Understandingthroughquantitation.·Perceptionthroughanimprovementinachosenindexofquality.·Efficiencythroughi
4、mprovedimagecoding.ImageAnalysisThegoalsofimageanalysiscantakeavarietyofforms:·Acompletesymbolicdescriptionofanimageatanadequatelevelofabstraction.·Alistofinterestingevents,orobjects,occurringwithintheimage.· Adescriptionofchangeswhichhaveoccurredbetweensuccessiverecordingsofanimage.Thefirstofthe
5、sedefinitionsallowsussomeflexibilityinthechosenlevelofabstraction.Inimageprocessingwewillnormallybeoperatingatthelowestlevel,whichnamesregions,pixelsorlinesandattributescharacteristics.Athigherlevelswebegintobringinknowledgeoftheimageddomain.Thegeneralstructureoftheoverallimagingsystemcanbesimplif
6、iedasinFigure7.1.Figure7.1AgeneralmodelofimageanalysisAsystemforpatternanalysisandunderstandingmayrequireuptosevenbasiccomponents.·Adatabasewhichcontainstheoutcomesofcaptureorprocessing.·Amodulecontainingalgorithmsandprotocolsofprocessing.·Amodulecontainingknowledgeaboutthetaskdomainandthecandidat
7、enatureoftheimage.·Amodulecontainingconceptsofcontrolandstrategiesofprocessing.·Alearningmodulewhichenhancesknowledgeinthetaskdomainbyanalyzingtheeffectivenessofcurrentprocessingstrategies.·Amodulewhichexplainsac
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