斜Haar類變換和Walsh變換及其在數(shù)字水印中的應用.pdf

1、華中科技大學碩士學位論文斜Haar類變換和Walsh變換及其在數(shù)字水印中的應用姓名：范燕平申請學位級別：碩士專業(yè)：計算數(shù)學指導教師：施保昌20080401華中科技大學碩士學位論文華中科技大學碩士學位論文IIAbstractWiththepopularityofwktheadventoftheinfmationageinfmationaccesshasgraduallybeenveryadvantageshtcut.Howeverital

2、somakesthecopyrightprotectionofdigitalproductssecurityofwkinfmationmemeimptant.Digitalwatermarkingasanewtechnologyofcopyrightprotectionisakindofleadingtechnologiesininfmationhidingitgainswidelyresearchapplication.thogona

3、ltransfmscanbedividedintosinusoidaltransfmsnonsinusoidaltransfms.WalshtransfmsHaartransfmsarethemostimptantmembersinnonsinusoidaltransfms.Theyhaveverysimpleconvenientalgithmsobeappliedinmanyareas.TheslantHaartypetransfmi

4、sdiscussedbyusingtheideaofbisectionevolutionmutationgeneratesbycombiningHaartypetransfmslanttransfm.IthastheexcellenceofHaartypetransfmslanttransfm.Thealgithmisconvenientinplaceverysuitablefrealtimeprocessing.Firstlyanew

5、digitalwatermarkingalgrithmbasedonslantHaartypetransfmWalshtransfmisproposedinthepaper.ThealgithmmakesfulluseoftheadvantagesofslantHaartypetransfmlikesimpleoperationflexibleparameterssoon.Itisespeciallybetterftheimageswh

6、osebrightnessarechangedgradually.Onthisbasisthepaperthengivesanewdualdigitalwatermarkingalgithmfcolimage.Thealgithmrealizestheadvantagesofhightransparentstrongrobustnessmultifunctionlargepayloadsize.Atthemeantimeitadopts

7、theselfrestingtechnologytomaketheminadvance.Theexperimentalresultsshowthattheproposedwatermarkalgithmsarenotonlyinvisibletotheimagebutalsorobusttoattack.Becauseofthechoiceofembeddedsubblockthealgithmsareverysuitablefimag