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基于BEMD的数字图像水印算法.docx

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基于BEMD的数字图像水印算法 Title:AnImageWatermarkingAlgorithmbasedonBEMD Abstract: Digitalimagewatermarkinghasbecomeacrucialtechniquetoprovidesecurityandcopyrightprotectioninthefieldofmultimedia.ThispaperpresentsanovelimagewatermarkingalgorithmbasedontheBidimensionalEmpiricalModeDecomposition(BEMD)method.TheproposedalgorithmextractsthesignificantfeaturepointsfromboththehostimageandthewatermarkimageusingBEMDandembedsthewatermarkintothehostimagebymodifyingthecorrespondingfeaturepoints.Experimentalresultsshowthattheproposedalgorithmachievesrobustnessagainstvariousattackswhilemaintainingahighlevelofvisualquality. 1.Introduction: Digitalimagewatermarkinghasgainedsignificantattentionduetotherapidadvancementofinternettechnologyandtheeaseofcopyinganddistributingdigitalmedia.Theobjectiveofimagewatermarkingistoembedahiddenpatternwithinthehostimagethatcanbelaterextractedforauthenticationorcopyrightprotectionpurposes.Therobustnessandimperceptibilityofthewatermarkarecrucialfactorsthatdeterminetheeffectivenessofawatermarkingalgorithm. 2.LiteratureReview: Thissectionprovidesanoverviewoftheexistingimagewatermarkingtechniques,highlightingtheirstrengthsandlimitations.Varioustransformdomainapproaches,suchasDiscreteWaveletTransform(DWT),DiscreteCosineTransform(DCT),andFastFourierTransform(FFT),havebeenwidelyused.However,thesemethodsoftensufferfromlowrobustnessagainstcommonattacks,suchascompression,noiseaddition,andgeometrictransformations. 3.BidimensionalEmpiricalModeDecomposition(BEMD): BEMDisadata-driven,adaptivesignal-processingtechniquethatdecomposesanimageintointrinsicmodefunctions(IMFs)basedonthelocalcharacteristicsoftheimage.ThissectionexplainstheprinciplesandimplementationstepsofBEMD,emphasizingitsapplicationsinimageprocessingandwatermarking. 4.ProposedImageWatermarkingAlgorithm: ThissectiondescribestheproposedimagewatermarkingalgorithmbasedonBEMD.Firstly,thehostimageandthewatermarkimagearedecomposedintotheirrespectivesetsofIMFs.Then,afeaturepointselectionstrategyisemployedtoextractthesal