Single Image Haze Removal Using Dark Channel P...

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1、SingleImageHazeRemovalUsingDarkChannelPriorKaimingHe1JianSun2XiaoouTang1,21TheChineseUniversityofHongKong2MicrosoftResearchAsiaAbstractInthispaper,weproposeasimplebuteffectiveimageprior-darkchannelpriortoremovehazefromasin-gleinputimage.Thedarkchannelpriorisakindofstatis-ticsofthehaze-f

2、reeoutdoorimages.Itisbasedonakeyobservation-mostlocalpatchesinhaze-freeoutdoorim-agescontainsomepixelswhichhaveverylowintensitiesinatleastonecolorchannel.Usingthispriorwiththehazeimagingmodel,wecandirectlyestimatethethicknessofthehazeandrecoverahighqualityhaze-freeimage.Resultsonavariet

3、yofoutdoorhazeimagesdemonstratethepoweroftheproposedprior.Moreover,ahighqualitydepthmapcanalsobeobtainedasaby-productofhazeremoval.Figure1.Hazeremovalusingasingleimage.(a)inputhazeimage.(b)imageafterhazeremovalbyourapproach.(c)ourrecovered1.Introductiondepthmap.Imagesofoutdoorscenesareu

4、suallydegradedbytheturbidmedium(e.g.,particles,water-droplets)intheatmo-contrastsceneradiance.Last,thehazeremovalcanproducesphere.Haze,fog,andsmokearesuchphenomenaduedepthinformationandbenefitmanyvisionalgorithmsandtoatmosphericabsorptionandscattering.Theirradianceadvancedimageediting.Ha

5、zeorfogcanbeausefuldepthreceivedbythecamerafromthescenepointisattenuatedclueforsceneunderstanding.Thebadhazeimagecanbealongthelineofsight.Furthermore,theincominglightisputtogooduse.blendedwiththeairlight[6](ambientlightreflectedintoHowever,hazeremovalisachallengingproblembecausethelineof

6、sightbyatmosphericparticles).Thedegradedthehazeisdependentontheunknowndepthinformation.imageslosethecontrastandcolorfidelity,asshowninFig-Theproblemisunder-constrainediftheinputisonlyasin-ure1(a).Sincetheamountofscatteringdependsonthedis-glehazeimage.Therefore,manymethodshavebeenpro-tanc

7、esofthescenepointsfromthecamera,thedegradationposedbyusingmultipleimagesoradditionalinformation.isspatial-variant.Polarizationbasedmethods[14,15]removethehazeeffectHazeremoval1(ordehazing)ishighlydesiredinboththroughtwoormoreimagestakenwithdifferentdegreesofconsumer/computation