基于多小波的醫(yī)學(xué)CT圖像去噪算法研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文基于多小波的醫(yī)學(xué)CT圖像去噪算法研究姓名：郭健申請學(xué)位級別：碩士專業(yè)：系統(tǒng)理論指導(dǎo)教師：張曉威20090501哈爾濱T程大學(xué)碩十學(xué)位論文ABSTRACTBecausethequalityofmedicalimageaffectsdiagnosisandtherapyofdoctortostateofanillnessdirectly，medicalimageprocessinghasbecomeahotspot

2、WaveletanalysisinheritsanddevelopsFouriertransformItiswidelyappliedtothedomainofmedicalimageThesinglewaveletbasisdonothasalltheprosperitiesessentialtotheimagedenoisingalgorithmbasedonwavelettransform，whichlimitsfurtherim

3、prove—mentofthesinglewaveletWaveShrinkalgorithmintheimagedenoisingeffectHence，themultiwaveletswhichhavebetterpropertiesattractpeople’SconcernandsomeresearchresultshavebeenobtainedThisarticletransformtheimagestomultiwavel

4、etsdomainbymultiwaveletstransformation，defineanewadaptiveWaveShrinkfunction，usingaspecialdifferenceformoftheLaplacianoperatorandalsoconsideringoffractaldimensionofeverysubbandinthewaveletdomainAndbasedonthis，wepresentane

5、walgorithmDifferentfromtheformeralgorithmstodenoising，thenewalgorithmCanautomaticallydeterminethewaveletcontractionthresholdinthemultiwaveletsdomainwithnoneofempiricalknowledgeofimagestodenoiseAsforsomestandard256levelge

6、ymedicalimages，seriesofsimulatedexperimentsaremadeExperimentalresultsshowthat，totheimbalancablemultiwavelets，newalgorithmnotnolyhasgooddenoisingeffect，butalsoCaneffectivelyremainthedetailedinformationveinscharacteristics