基于DWT的數(shù)字圖像水印算法研究與實(shí)現(xiàn).pdf

1、武漢理工大學(xué)碩士學(xué)位論文基于DWT的數(shù)字圖像水印算法研究與實(shí)現(xiàn)姓名：李綱申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：信號(hào)與信息處理指導(dǎo)教師：闕大順20080401武漢瑾|：人學(xué)碩七學(xué)像論文ABSTRACTWiththerapiddevelopmentofInformationTechnologyandtheemegenceofelectroniccommerceandcommercialmultimediaservice，copyrightprotecti

2、ontechnologyofmultimediadataisthehotspotofthecurrentresearchDigitalwatermarkingtechniqueisaneffectivemethodtosolvetheproblemofdigitalcopyrightprotection。Anddigitalwatermarkingtechniquebasedoncolorimageistheresearchhotspo

3、tinthisfieldThisdissertationmakesaresearchonthealgorithmofimagewatermarkingbasedonDwT(DiscreteWaveletTransform)Theemphasesisimagewatermarkingalgorithmbasedoncolorimage，twokindsbasicalgorithmswasimprovedwhichgrayimagewate

4、rmarkingwasembedintocolorimage，basedonthetwomethods，thisdissertationmakesawideanddeepresearchonallimprovedalgorithmofapiecedispersestoembedwatermarkinginformationbasedonDWTTheexpedmentalresultsshowthesuperiorityofdesigna

5、lgorithm。Themaincontributionsofthisdissertationarerecapitulatedasfollows：1Muchmoreattentionhasbeenpaidinthedomesticandoverseadevelopmentprocessandtrend，existingproblemsandresearchhotspotoftheinformationhidinganddigitalwa

6、termarking。Onthebasisofthoroughresearchoninformationhidingtheoryanditsrelatingtechniques，thisdissertationanalyzestheproblemindigitalwatermarking，discussesthemaintopicandthesolutionsofthissubject，andalsoexplainedthebasict

7、heoryofdigitalwatermarkingtechnologywhichisincludingwatermarkingwaveletgenericembeddingmodelandthetypicalalgorithmThencomparesDWTtoothertransformdomainalgorithm，discussesthemainreasontochoosethealgorithmbasedonDWT2。Forri

8、sewatermarkingsecurity，thealgorithmunitesArnoldvariesandrandomvariesbeforethewatermarkingembedding，SOthetowkeysmaketheWatermarkingsequencemuchmoresteady3Thealgorithmresearchesthebilevelimagewatermarkingtoinsertintheimage