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基于DTC鲁棒盲水印算法算法研究 Abstract Withtheriseofdigitalmedia,theprotectionofdigitalcopyrighthasbecomeincreasinglyimportant.Digitalwatermarkingisaneffectivetechnologytoprotectthecopyrightofdigitalmedia.Inthispaper,wefocusontheDTCrobustblindwatermarkingalgorithm,whichisanewlyproposedalgorithmbasedonthediscrete-timechaossystemandtheDTC(DualTreeComplex)wavelettransform.Thealgorithmiscapableofwatermarkingbothimagesandaudiofiles,andithasbeenshowntohavegoodrobustnessagainstvariousattackssuchasnoise,compression,andcropping. Introduction Withtherapiddevelopmentofdigitalmediatechnology,digitalmultimediacopyrightprotectionhasbecomeincreasinglyimportant.Thepiracyofdigitalcontenthasbecomeacommonphenomenon,whichposesseriousthreatstotheintellectualpropertyrightsofcontentcreators.Therefore,digitalwatermarkingtechnology,asameansofdigitalcontentprotection,hasattractedmoreandmoreattentionfromresearchers. Digitalwatermarkingreferstotheprocessofembeddingapieceofinformationintodigitalmedia,whichcanbeidentifiedandextractedasevidenceofownership.Thewatermarkinformationcanbeusedtoproveownership,authenticatethecontent,anddetectanytampering.Digitalwatermarkingtechnologycanbeclassifiedintofragilewatermarkingandrobustwatermarking.Fragilewatermarkingisusedtodetectanymodificationsoftheoriginaldata,whilerobustwatermarkingisusedtoembedredundantinformationthatcansurvivevariousattacks. Inrecentyears,manywatermarkingalgorithmsbasedonchaoticsystemshavebeenproposed,suchastheArnoldtransformbasedwatermarkingalgorithmandtheDNA-basedwatermarkingalgorithm.Thesealgorithmshaveshowngoodperformanceintermsofrobustnessagainstattacks.Inthispaper,weproposetheDTCrobustblindwatermarkingalgorithmbasedonthedualtreecomplexwavelettransformandthediscrete-timechaossystem.Thealgorithmcanbeusedtowatermarkbothimagesandaudiofiles. TheDTCRobustBlindWatermarkingAlgorithm TheDTCrobustblindwatermarkingalgorithmisanewalgorithmthatcombinesthedualtreecomplexwavelettransformandthediscrete-timechaossystemtoembedandextractawatermark.Thealgorithmco