彩色圖像水印的非線性檢測方案研究.pdf

1、青島大學(xué)碩士學(xué)位論文彩色圖像水印的非線性檢測方案研究姓名：吳曉明申請學(xué)位級別：碩士專業(yè)：系統(tǒng)理論指導(dǎo)教師：段法兵20110608AbstractTherapiddevelopmentofdigitaltechnologyandinternettechnologymakesmultimedia、)~rorks(Image，VideoandAudio)growquicklyandprevailextensivelybutthepiracyb

2、ecomesincreasinglysevereThus，inordertosafeguardthelawfulrightsofcreatorstheprotectionofthecopyrightofdigitalproductsisakeyproblemfortheflourishofculturalmarketInthissituation，thedigitalwatermarkingtechnologywasproposedTh

3、edigitalwatermarkingtechnologyprovestheownershipofmultimedla、Ⅳorksbvembeddingsecretinformation，iewatermark，intotheoriginaldigitalproductsSincethedigitalwatermarkinghassuchsignificantfeaturesasinvisibilitynon—detection，ro

4、bustness，a11dsecuri劬itbecomesapowerfultoolforprotectingthecopyrightsofmultimediaworksIntllisthesiswemainlystudytheccolorimagewatermarkingWeimprovethemethodofBami，Salgorithmofthediscretecosinetransformation(DCT)一domainima

5、geswat咖arl(ingIntheRedGreenBlue(RGB)systemofcolorimages，the1LGandBbandsareex仃actedrespectivelywhichcorrespondstodifferentcolormatrixThen，byseleIctingoRebandofRGB，theDCTofthisbandiscomputedWeresorttheDCTcoefficientsbythei

6、rvalues，andviewitasaBernoullidistributionInthiswaytheclaSsicalmultiplicativealgorithmofBarnibecomesalladditionaloneThen，wededuceanonlinearwatermarkingdetectorbYtheweak—signaldetectiontheoryinadditivenoiseFi衄llv’、Ⅳeanalyz