基于多尺度分形的數(shù)字水印算法研究.pdf

1、黑龍江大學(xué)碩士學(xué)位論文基于多尺度分形的數(shù)字水印算法研究姓名：韓玉蘭申請學(xué)位級別：碩士專業(yè)：信號與信息處理指導(dǎo)教師：蔣愛平20100428AbstractAbstractInrecentyears，InteractisanexcellentdistributionsystemfordigitalmediabecauseitischeapandfastItisknownthatdigitalmediacanbeeasilyreplicate

2、dandmodifiedThus，digitalwatermarkinghasbeendevelopedtoprotectthecopyrightandintegrityofmulti—mediacontentAsaveryimportantbrandofnonlinearscientificresearch，fractaltheoryhasspreadoverlotsofareasofimageprocessingincludingd

3、igitalwatermarkingInviewofsomealgorithmstotherobustness，thethesisconductsaprimaryresearchonthedigitalwatermarkingbyfractalandContourlettransformFirstlyfractalcodingisappliedtothedigitalwatermarkingandtraditionalsubblockD

4、CTalgorithmisimprovedTheembeddingandextractionwasimplemented、柝msignificanceThen，anewwatermarkingalgorithmbasedonmultifractalandtwodimensionLogisticchaoticmapisproposedThealgorithmisbasedonContourletandWaveletPerformancec

5、omparisonofthealgorithminbothdomainsisperformedItdemonstratesthatContourlethavefuturepotentialinwatermarkingAfterthat，astherequestofverificationandwatermarking’Sdevelopingdirection，anewalgorithmbasedonmultifractalandCont

6、ourlettransformisproposedWhenextractingwatermarkdatathealgorithmdoesnotneedoriginalimage，anditrealizesblindextractionAtlastinordertOtestimperceptibilityandrobustnessofthealgorithms，computersimulationsonthethreealgorithms

7、areperformed，respectivelyExperimentalresultsshowthatontheconditionofinvisibilitythealgorithmshavegoodrobustnessagainstcommonattackssuchasJPEGnoiseandSOonKeywords：Digitalwatermarking，F(xiàn)ractalcoding，LuminanceshiftingfactorM