资源描述：
《Center weighted median filters.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、984IEEETRANSACTIONSONCIRCUITSANDSYSTEMS,VOL.38,NO.9,SEPTEMBER1991CenterWeightedMedianFiltersandTheirApplicationstoImageEnhancementSung-JeaKO,Member,ZEEEandYongHoonLee,Member,ZEEEAbstract-Thecenterweightedmedian(CWM)filter,whichistheperformanceofmedianfilteringisunsatisfactoryinaweightedm
2、edianfiltergivingmoreweightonlytothecentralsuppressingsignal-dependentnoise.Recently,inresponsevalueofeachwindow,isstudied.Thisfiltercanpreserveimagedetailswhilesuppressingadditivewhiteand/orimpulsive-typetothesedifficulties,severalvariationsofmedianfiltersnoise.Thestatisticalpropertieso
3、ftheCWMfilterareanalyzed.havebeenintroduced.Specifically,themax/median[8],ItisshownthattheCWMfiltercanoutperformthemedianFIR-medianhybrid[91,[101,andmultistagemedian[91,filter.SomerelationshipsbetweenCWMandothermedian-type[111filtershavebeendevelopedfordetailpreservingfilters,suchastheWi
4、nsorizingsmootherandthemultistagesmoothing.Thesefilterspreservemoreimagedetailsatmedianfilter,arederived.InanattempttoimprovetheperformanceofCWMfilters,antheexpenseofnoisesuppression.In[12],anadaptiveadaptiveCWM(ACWM)filterhavingaspacevaryingcentralmedianfilterthatadjuststhewindowsizedep
5、endingonweightisproposed.WeshowthattheACWMfilterisanexcel-theinputisproposedtotradebetweendetailpreservationlentdetailpreservingsmootherthatcansuppresssignal-depen-andnoisesuppression.Forsignal-dependentnoisereduc-dentnoiseaswellassignal-independentnoise.tionsomeadaptivemedian-typefilter
6、s,suchasadaptivedoublewindowmodifiedtrimmedmean[131andsignaladaptivemedian1141filters,havebeenproposed.TheI.INTRODUCTIONoutputsoftheadaptivemedian-typefiltersareobtainedAVARIETYofadaptivefilteringtechniqueshasbeenbasedontheresultsofmedianfiltering,andasaconse-proposedforenhancingimagesde
7、gradedbynoisequencetheseadaptivefilterstendtoremoveimagedetails[1]-[6].Byadjustingtheirparameters,dependingonlocaljustlikemedianfiltering.characteristicsoftheinputimage,thesefilterspreserveTheweightedmedian(WM)filterisanextensionofthesharpsustainedchanges(edges)intheimage
