基于Contourlet變換的數(shù)字圖像盲水印技術(shù)研究.pdf

1、蘇州大學(xué)碩士學(xué)位論文基于Contourlet變換的數(shù)字圖像盲水印技術(shù)研究姓名：魏晶晶申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：馬小虎201104AbstractResearchonBlindWatermarkingTechniqueofDigitalImagesBasedOilContourletTransformResearchonBlindWatermarkingTechniqueofDigitalImagesBasedonC

2、ontourletTransformAbstractWiththedevelopmentofmultimediatechnologyandthepopularizationoftheInternet，thedigitalproductsareusedmorewidelythanbeforeThewaysofhowtelease，acquire，andchangeinformationaremoreandmoresimpleandvari

3、edAsakindofimportantmeansinthedomainofcopyrightprotection，digitalwatermarkingtechnologybecomesahotspotintheacademicfieldInthisthesis，wedoalotofresearchondigitalwatermarkingbasedonContourletdomainThemainworksofthispaperar

4、easfollows：1Firstofall，weintroducethebackgroundsignificancehistoryanddevelopmentofthedigitalwatermarkingbothathomeandabroadThenanalyzethedigitalwatermarkingtechnologyandContourlettransformationtheory2Ablinddigitalwaterma

5、rkingalgorithmisproposedbasedontheanalysisofcharacteristicofContourletdomaininthisthesisFirstlyperfromContourlettransformonthehostimage，choosingthelowfrequencysubbandastheembeddingdomain；thenfindthepositionofdigitalwater

6、markingintheembeddingdomaincombiningwith2DlinearmappingAtlast，embeddigitalwatermarkingtothehostimagewiththemethodofparityquantitative3CombiningwiththecharacterofContourlet，analgorithmofquantitativeisproposedinthisthesisW

7、efirstcomputethethresholdofHVS(HumanVisualSystem)andperformContourlettransformtothehostimage，dividingthetransformedhostimageaccordingtothesizeofdigitalwatermarkingThenchoosethesub—blocktoembedwatermarkcombinedwithHVSThed