圖像數(shù)字水印研究.pdf

1、西北工業(yè)大學碩士學位論文圖像數(shù)字水印研究姓名：章玉蓉申請學位級別：碩士專業(yè)：模式識別與智能系統(tǒng)指導教師：郭雷20030301AbstractWiththerapiddevelopmentofComputerNetworkandCapacityforstoringinformation，thedigitalmediacanbeduplicatedandtransmittedrapidlyatalmostnocostButdigitalme

2、diacallbeeasilyduplicatedandtamperedsothesecurityofdigitalmediacannotbeguaranteedButit’Shardtoprotectthesecurityofdigitalmediabythetraditionaldigitalencryption，becausethesecurityofdigitalmediawouldnotbeprotectedafterdecr

3、yptionInordertocompensatethedefaultofencryption，digitalWatermarkingcomesforthDigitalWatermarkingisanewtechnologyforthecopyrightprotectiontothedigitalmediainthenetworkedenvironmentItcanprotectthesecurityofdigitalmediaeffe

4、ctivelythroughthedetectingthewatermarkembeddedinthemediaTheappearance，application，watermarksystemprinciple，classificationsandattacksareoutlinedinthispaperThispaperfocusesondigitalwatermarkingonimagesFirst，Theappearance，a

5、pplication，watermarksystemprinciple，keytechniquesareoutlinedinthispaperThefollowingsareourcontributions：1InformationtheoreticapproachesareconcernedwithcapacityinthispaperandoptimalconvertandaaackpoliciesareanalyzedAndapp

6、lyingtheseconclusiontoimage，thewatermarkcapacityofimageisapproximatelycalculated2TheauthoranalyzesWaveletDomainwatermarkingandDWThowtobeappliedtodigitalwatermark，andcompareswithDCTDomainwatermarkingbyexperimentAlsocombin

7、ingwithimagecodingtoanalyzedigitalwatermarkingKeyWords：DigitalWatermarking，InformationtheorywatermarkingcapacityParallelGaussianChannels，SpikeModel，optimalconvexchannel，optimalattackchannel，EQModel，WaveletTransform，Zerot