Watermarking digital image and video data. A state-of-the-art overview.pdf

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1、AState-of-the-ArtOverviewnthepastdecadetherehasbeenanexplosionintheToprovidecopyprotectionandcopyrightprotectionuseanddistributionofdigitalmultimediadata.PCsfordigitalaudioandvideodata,twocomplementarytech-withInternetconnectionshavetakenhomesbyniquesarebeingdeveloped:encryptio

2、nandwatermark-Istormandhavemadethedistributionofmultimediaing[23].Encryptiontechniquescanbeusedtoprotectdataandapplicationsmucheasieranddigitaldataduringthetransmissionfaster.Electroniccommerceapplica-GerhardC.Langelaar,fromthesendertothereceiver[63].tionsandon-lineservicesarer

3、apidlyAfterthereceiverhasreceivedandde-IwanSetyawan,andbeingdeveloped.Eventheanalogau-cryptedthedata,however,thedataisdioandvideoequipmentinthehomeReginaldL.Lagendijkidenticaltotheoriginaldataandnoisintheprocessofbeingreplacedbylongerprotected.Watermarkingtheirdigitalsuccessors

4、.Asaresult,wetechniquescancomplimentencryp-canseethedigitalmassrecordingdevicesformultimediationbyembeddingasecretimperceptiblesignal,awater-dataentertheconsumermarketoftoday.mark,directlyintotheoriginaldatainsuchawaythatitalwaysremainspresent.Suchawatermark,forinstance,canbeus

5、edforthefollowingpurposes:TheNeedforWatermarking▲CopyrightProtection:FortheprotectionofintellectualAlthoughdigitaldatahasmanyadvantagesoveranalogproperty,thedataownercanembedawatermarkrepre-data,serviceprovidersarereluctanttoofferservicesindig-sentingcopyrightinformationinhisda

6、ta.Thiswatermarkitalformbecausetheyfearunrestrictedduplicationandcanprovehisownershipincourtwhensomeonehasin-disseminationofcopyrightedmaterial.Becauseofpossi-fringedonhiscopyrights.blecopyrightissues,theintellectualpropertyofdigitally▲Fingerprinting:Totracethesourceofillegalco

7、pies,therecordedmaterialmustbeprotected[90].Thelackofownercanuseafingerprintingtechnique.Inthiscase,thesuchadequateprotectionsystemsforcopyrightedcontentownercanembeddifferentwatermarksinthecopiesofthewasthereasonforthedelayedintroductionofthedigitaldatathataresuppliedtodiffere

8、ntcustomers.Finger-versatiledisk(DVD)[100].Severalmedi