多功能數(shù)字水印技術(shù)的研究與實(shí)現(xiàn).pdf

1、上海師范大學(xué)碩士學(xué)位論文多功能數(shù)字水印技術(shù)的研究與實(shí)現(xiàn)姓名：蔣慧鈞申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：王沛20070301上海師范大學(xué)項(xiàng)士學(xué)住論文：多功能敷字水印技術(shù)的研究與實(shí)現(xiàn)RESEACHANDIMPLEMENTAIONG0FMUL_TIFUNCTl0NALWATERMARKINGABSTRACTWitlIthempiddevelopmentofcomputernetworktechnologythestorage丑耐c

2、opyofthedi百talmultimediatechnique，moreandmoreemphasisispaid佃cop巾ghtprotectionandverificationofdigitalproductsDigitalwatennagldngprotectstheco剛ghtandcontentauthenticationbyembeddingsomesecretinformationwhichiscalledwaterm

3、ark11搖existenceofthewatermarkinthedigitalproductsshouldnotinfluencethequalityoftheoriginald／畫(huà)taJproductobviouslyanditisdifficulttemovethewatermarkThereagemanypapersaboutrobustdigitalw鋤cfmafking，butpapersaboutfra癭ledigita

4、lwatermarkinga塢fewerThusn忙resemchofmulti—functionaldigitalwatermarkingisusuallyignoredInthispaperakindofmultifunctionaldigitalwatermarkingisprovidewhich啪beappliedtOcopynghtprotection嘲trackingandcofltentauthentication缸the

5、鞠metimeTl鹼multifunct／onalwatenmAisdividedintotwoparts；robustwatermarkandfragilewatermark丁hcrobustwatermarkisusedtoprovidethecopyghtprotectionofimageand蝴tracking；thefragilewatermarkisusedforauthen6cationofthecontenL11磚atK

6、hofdevisedoorealgorithms誠(chéng)也detailedpc響徹a瓣analysisandcomputersimulmionsmmaincontributionofthispaperislistedasfollows：L11磚algorithmofrobustwatermarkingwhichimplcxaentedcopyrightprotection哪basedOnthecharacteristicofsystemati

7、ccodeinRSeTrorcorrectingcodeAimedatclientandCertificateAuthoritythisalgorithmdesignedtwodifferentextracungmethods，whichensuredtwodifferentreqmrementsofrobusmcss2malgorithmofrobustwatermarkingwhicIlimplementedus盯tracingwa

8、sbasedOilSVDquantizationandgroupil瑤insertingwatermarkItreachedthestandardofstrongrobustnessandcouldachieve100％extractingw／thcertainattracting3n磚algorithmofsemifragilewatermarkin呂whichimplementedtheauthenticationofcontent

9、wasbased011themainsegmentsofimagequaJitylosinginJPEG2000compression砸碑watermarkisemployingtheselfcharacteristicofneighborhoodAnd位釬哂商mageandoriginalwatermarkiSnotirlneedwhileextractingmSalgorithmwasalsoprovided山efuRctlonof

10、tamperedpositioningwhichmadethissemirfragilewatcmmtdnginotepracticability4Inthe砒afterauth0／consideringtheinfluencebctweellrobustandsemifragilewatermarkingalIfunctionsabovementionedwereaddedintooneimageThesimulationresult

11、sshowedthiskindofmultifunctionaldjgitalwatermarkingprovidedcop)耐ghtprotectionusertrackingaswellascontentauthenticationandeachfunclionperformedweilKEYWORDS：multifumtional擊目忸1watemtarkm島copyngmprotectionc沁ntlmtauthemicatio