基于多聚焦图像融合的新方法.doc

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1、英文翻译系别专业班级学生姓名学号指导教师ANewMethodforMulti-FocusImageFusionUsingCountourletTransformAbstractImagefusionbasedonContourlettransformwillproduceapseudo-Gibbseffectforthelackoftranslationinvariance.WeproposedamethodwhichcombinedContourlettransformwithimageblockingfusiontosolvethispro

2、blem.FirstlyanewfusionrulebasedonContourlettransformwasproposedtogettheinitialfusedimage.Secondly,sourceimagesandtheinitialfusedimagewerepartitionedintoequalsizeimageblocks.Thesourceimageblocks,whichweremoresimilartothecorrespondinginitialfusedimageblocks,werechosenasthefina

3、lfusedimageblocks.Fortheborderpartbetweentheclearpartandblurringone,theinitialfusionresultswerekept.ExperimentalresultsshowthatthismethodcaneffectivelyeliminatetheimagedistortionarisingfromContourlettransformlackoftranslationinvariance.Thefusioneffectisbetterthantheeffectofi

4、mageblockingandContourlettransformfusionmethods.Keywords:imagefusion;Contourlettransform;translationinvariance;imageblocking;blockeffecI.IntroductionBecauseofthegooddetailsperformancecapabilitieswiththemulti-resolutionanalysis,it’snowwidelyusedinimagefusionprocessing.Fusiona

5、lgorithmscommonlyusedintransformdomainincludewavelettransformandmulti-scalegeometricanalysis.Becauseseparablewavelethaslimiteddirection,whichleadstothedefectsthattheedgesanddetailsofthefusedimageappearblurry.Tosolvethisproblem,multi-scalegeometricanalysisarises.Imagefusional

6、gorithmsbasedonContourlettransformhavebeenproposedinsuccession,seeninRef..Contourlettransformhastheadvantagesofhighlydirectionalandanisotropy,whichleadstothebetterimagefusioneffectsthanwavelettransform.ButContourlettransformandwavelettransformarealllackoftranslationinvarianc

7、e.Imagefusionprocesswillproducepseudo-Gibbseffectwhichcausesimagedistortion.Imageblockingfusionalgorithmistranslationinvariantduetodirectlyselectingclearimageblocksasfusionresultswithoutthestepofsampling.However,blockingeffectswillappearontheborderpartbetweentheclearareasand

8、blurareas.Accordingtotherespectiveadvantagesofthetwoalgorithms,weproposeane