基于相關(guān)系數(shù)的快速分形圖像編碼方法.pdf

1、上海大學(xué)碩士學(xué)位論文基于相關(guān)系數(shù)的快速分形圖像編碼方法姓名：任卓敏申請學(xué)位級別：碩士專業(yè)：電工理論與新技術(shù)指導(dǎo)教師：林貽俠20030101AbstractThefractalimagecompressionisoneoftheimportantresearchfieldsforFractalTheorywhileslowencodingspeedoftheclassicalalgorithmdetersitsapplicationsSe

2、veralenhancedalgorithmshadbeenproposedtoyieldbetlerperformanceincompressionratio，encodingspeedandreconstructionqualityetcThepaperbringsforwardafastfractalencodingalgorithmwithawholenewconcepttospeed—uptheencodeprocessThe

3、mainreasonaccountingfortheslowencodingspeedisthelargeamountofmatchesbetweentheRangeblocksandDomainblocksinordertofindthemostsimilarblockpairsinfractalencodingprocessObviously，theblocks’correlativitycanbesomemeasurementof

4、similaritywiththestrongcorrelativitycorrespondingtothegoodsimilarityandpooronestothebadsimilarityRealizingthefact，amatchingdiscriminantbasedonthecorrelativitycoefficientwilleffectivelyeliminatealargenumberofDomainblockso

5、utoftheRangeblocks’match，savingtimeandimprovingspeedgreatlyWhilethehighsimilarityofmatchedDomainblocksandRangeblocksensuresthesatisfiedmatchingresultsthereisonlyslightdropinreconstructionqualityTheexperimentresultdemonst

6、ratesthefeasibilityandefficiencyofthenewalgorithm，acquiringbothhighspeed—upinencodingprocessandgoodreconstructionqualityWhenthealgorithmiscombinedwithdifferentcompressionmethodsbetterperformancewillbewellexpectedinthefut