數(shù)字圖像壓縮與加密技術(shù)的研究與實(shí)現(xiàn).pdf

1、西安電子科技大學(xué)碩士學(xué)位論文數(shù)字圖像壓縮與加密技術(shù)的研究與實(shí)現(xiàn)姓名：韓寧申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師：楊世勇201103AbstractWiththefastdevelo伽nentofne觚orkandmultimedia，thesecurityandefficiencyofimagedatatransmissionhasbeengainingmoreandmoreattentionSothedigitalimagec

2、ompressionandencryptiontechnologyhaVebeenbornThispapermainlydiscussestheimagecompressioncodingalgorithmthatisbasedonwaVelettransformandtheimageencryptionalgorithmbasedonchaostheoryThemaincontentsof。theresearchcanbesummar

3、izodasthefollowingaspects：1Theembeddedco(1ingalgorithmbasedonwavelet—tree，includhgEmbeddedZerotreesWaVeletalgor汕mandSetPanitioninginHierarchicalTreesalgorithm，isstudiedindetailIn()rdertoachievehighercompressionratio，weco

4、mbineEZWalgoritllmandadaptivearithmeticcodingalgorithmtoimplementanimagecompressionsVstemInaddition，onthebasisoftheanalysisoftheSPIHTprinciple，improVementismadeteducememoryconsumptionandenhancethealgorithm’se衢ciency2Anew

5、imageencUptionalgorithmbasedonchaoticsystemsispresentedInthenewalgorithm，thepositicInofimagepixelsisscrambledbyastandardchaosmapAndthevalueofimagepb①IsischangedbyaXORmatrixwhichisgeneratedbytheLogisticMappingThesimulatio

6、nresultsshowthattheproposedencryptionalgorit№isvalid3Adigitalimagec()ntentprotectionsystemisrealizedbyaniInageencryptionmethodillwhichthecompressedilnagecodeStre鋤andarandomsequencegeneratedbyLogisticmapping、Villbethebitw