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46201412INTELLIGENTCOMPUTEＲANDAPPLICATIONSVol．4No．6Dec．20142014－11－101980－、。MATLAB211135。MATLAB。MATLABTP301A2095－2163201406－0087－03TheMedianFilteringAlgorithmofImageEnhancementbasedonMATLABWANGSainanJiangsuProvinceNanjingEngineeringVocationalCollegeNanjing211135ChinaAbstractImageenhancementtechnologyistoimprovetheimageofthemostcommonlyusedtechniquesthepurposeistoimprovetheimagevisualeffectmaketheimagemoreclear．Thispapermainlyexpoundsthenonlinearmedianfilteringal-gorithmofspatialfilteringprincipleandtheoreticalbasis．AndintheMATLABplatformthroughthedifferentfiltertemplateandaddingdifferentnoisemedianfilteringsimulationexperimentandtheexperimentalresultsanalysisaregivenout．KeywordsMedianFilteringImageEnhancementMATLAB01。。、。、、MATLAB。1。。。2。1．13。fxy、、AGxy=Medxy∈AGxy11。1．2。X1X2…XnX'1＜X'2＜…＜X'n2y=MedX1X2…Xn=X'nnisodd12X'n2+X'n2+[]1nis{even22。3×355×5137×7259×941。1015202020202025100“20”。1．3medfilt2MATLABmedfilt21K=medfilt2BmnBm×n。2K=medfilt2Bmn3B。2MATLAB7．6。MATLAB4。2．10．083×3、5×5、7×7、9×9。MATLABimnoisemedfilt2。I=imread’saturn．png’%I=rgb2grayIJ=imnoiseI’salt＆pepper’0．08%subplot231imshowItitle’’subplot232imshowJtitle’0．08’k1=medfilt2J%3×3k2=medfilt2J55%5×5k3=medfilt2J77%7×7k4=medfilt2J99%9×9subplot233imshowk1title’3x3’subplot234imshowk2title’5x5’subplot235imshowk3title’7x7’subplot236imshowk4title’9x9’1。1Fig．1Medianfilteringwithsaltandpeppernoisefilter2．20．0800．040．069×9。I=imread’saturn．png’%M=rgb2grayIN1=imnoiseM’salt＆pepper’0．08%0．08N2=imnoiseM’gaussian’00．04%00．04N3=imnoiseM’speckle’0．06%00．06G1=medfilt2N199%N19×9G2=medfilt2N299G3=medfilt2N399subplot241imshowMtitle’’subplot242imshowN1title’’subplot243·88·4imshowN2title’’subplot244imshowN3title’’subplot246imshowG1title’’subplot247imshowG2title’’subplot248imshowG3title’’2。2Fig．2Medianfiltertoremoveavarietyofdifferentnoisecontrastimages3。10．083×3、5×5、7×7、9×9。。2。。、。4。5MATLAB。。1．MATLAB7．6M．2009．2．MATLABM．2014．3．D．2013．4．MATLABM．2014．5．J．20133364－367407．·98·6MATLAB