基于視覺特性的密寫與密寫分析算法及實踐研究.pdf

1、南開大學(xué)碩士學(xué)位論文基于視覺特性的密寫與密寫分析算法及實踐研究姓名：石培培申請學(xué)位級別：碩士專業(yè)：信息與通信工程；通信與信息系統(tǒng)指導(dǎo)教師：李朝暉201105AbstractAbstractWiththeadventoftheinformationage，informationsecurityissueshavebeenpaidmoreandmoreattentionAndwiththedevelopmentofinformationte

2、chnologytheinformationsecurityconcepthasbeingexpandedanddeepenedcontinuouslyAtpresent，thetechniquesmainlyincludecryptographyandinformationllidinginthefieldofinformationsecurityTheaimoferyptologytechniqueishidingtheconten

3、tofsecretwhiletheinformationhiding’SaimishidingtheexistenceofsecretThroughembeddingunnoticeablesecretsintodigitalmediasignalssuch觴images，audioandvideo，informationhidingrealizesthefunctionofeopynghtprotectionandsecretcomm

4、unication，andgivesanewsolutiontothesecurityissuesofdigitalinformationAsanimportantbranchofinformationhidingsteganographyhasuniqueadvantageinsecretcommunicationandhaspromptlybecomeahotspotintheresearchfieldofinformationse

5、curityThesteganographybasedonvisualcharacteristicshasgoodvisualimperceptibilityandhighdataembeddingcapacityTherefore，itoccupiesanimportantpositionintheresearchofsteganographyResearchsituationofsteganographyandsteganalysi

6、salereviewedinthispaperGenerallyspeakingbotllpartiesofacontradictionhavemanyproblemstObeknownandmanydifficultiestObesolvedTherefore，manyresearchersareneededtostudythisareaindepthTlispaperintroduceschaostheoryintosteganog

7、raphyandadoptslogisticmappingmethodtogeneratechaoticsequenceThemainapplicationsare勰follows：firstlyitCanbeusedtosecretinformationencryptionwhichcanenhancethesecurityofthesteganography；secondlyitisusedtostimulatethebinaryd

8、atastream，whichcallfacilitatetheprocessofvariousexperiments；thirdlyitisusedtosetthethresholdincrementTllispaperdesignsandrealizesBPCSalgorithmandPVDalgorithm，andgivesthesteganalysisseparatelyInchapter5，thispaperpointsout