cr图像处理技术分析及其影像增强算法研究-控制理论与控制工程专业毕业论文-analysis of cr image processing technology and research on its image enhancement algorithm - graduation thesis of control theory and control engineering specialty.docx

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cr图像处理技术分析及其影像增强算法研究-控制理论与控制工程专业毕业论文-analysis of cr image processing technology and research on its image enhancement algorithm - graduation thesis of control theory and control engineering specialty.docx

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cr图像处理技术分析及其影像增强算法研究-控制理论与控制工程专业毕业论文-analysis of cr image processing technology and research on its image enhancement algorithm - graduation thesis of control theory and control engineering specialty

东北大学硕+学位论文ABSTRACTAnalysisofComputedRadiographyImageProcessingTechniqueandAlgorithmStudyofImageEnhancementAbstractInComputedRadiographysystem，theimagequalityisrelatedwithdatacollection，dataaccessing，dataprocessingandrecording，whichbelongtothetaskofimageprocessing．TheprocessingaboutimagedisplayisoneofthekeytechniquesintheCRimageworkingstation．ThebasicrequirementofCRimageprocessingistodisplaytheimageclearlywithoutlosingusefulinformation．Imageenhancementistheprimaryimageprocessingmethod．Nowtherearealotofmethodsaboutimageenhancement，buttheyalwayshavesomenegativeeffects．Forexample，artifactedgeisthemostfamiliarnegativeeffect．Itisunacceptableinpracticalapplicationofmedicalimage．BasedOBthecarefulanalysisoftheoperationoftheCRreader,thispaperpointsouteonnaturalnoiseandquantanoisearemainfactors，whichaffectthequalityofCRimage．Combiningwith the characteristics of CRimage andmedical imageprocessing，synthesizingvariantadvancedimageenhancementalgorithms，thispaperemphaticallystudiesthe enhancementalgorithms．Thispaperpointsoutamulti—scalecontrastalgorithm，whichbasedonLaplacianpyramidtransformandcombiningwithCRvaluestretchanddynamicrangereduction．Uponthisalgorithm，thetotalimagecontrastanddetailscontrastcanbeenhanced，atthesametime，thehighfrequencynoiseinlowdoseareaalsocanbesuppressedefficiently．Thebasicideainthisalgorithmistodecomposetheimageintocomponents，whichrepresentdifferent spacefrequency．Inthisway,theimagedetail，edge，backgroundandnoisearedecomposed．Soithasmostadvantagesinimageenhancementanddenoise．Thesecanbeshownbyexperiment．WealsocomparedCRimagewithconventionalXray．TherearemanymeritsinCRimage．Inthispaper,weanalyseDICOM3．0inCRimageindetail．Underactualrequirement，vistasforthelaterworkinCRworkstationaregiveninthe．Ill尔北大学硕士学位论文ABSTRACTpaper．AllimagearereceivedfromCRandDRequipmentsofNeusoftDigitalMedicalSystems．ThepaperbuildsaCRimageprocessingsystembyVC++．someofthemethodsarepractisedbyMATLAB，KeyCR Image Processing，Laplacian Pyramid，Image Enhancement，Multi-ScaleContrast，DICOM(Digita