快速分形图像编码算法的研究

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1、北京交通大学硕士学位论文快速分形图像编码算法的研究姓名：刘美琴申请学位级别：硕士专业：信号与信息处理指导教师：赵耀20061201ABSTRACTFIChasattractedtheattentionofmanynativeorabroadresearcherssinceItwasintroducedintothefieldofimagecoding,duetoitsadvantages，suchashilghcompressionperformance,simpleandfastdecodin

2、gprocess，novelencodinganddecodingtheoryandresolutionindependence．Themainconsumingtimeistheprocessoffindingthebestmatcheddomainblockinalargedomainpoolfuragivenrangeblock,computingandquantizingtheparametersandtheprocessofimagepartition．Thisdissertation

3、beginswiththedevelopment，advantagesanddisadvantagesoffractalimagecoding,andthenintroducessomeimprovedFICalgorithms．Themaincontributionsoftllisdissertationareasfuliows：①Accordingtotherelationshipbetweenthevariancesofrangeblocksanddomainblocks,aalgorit

4、hmisproposedtoimproveFisher’sscheme．ExperimentresultsshowthattheproposedalgorithmneedslessencodingtimeandhavealmostthesamedecodedimagequalityasFisher’s．②AfastfractalimagecodingalgorithmbasedonFGSEisproposedinthisdissertation．It锄speeduptheencodingproc

5、essandkc印thesamedecodedimagequality．Nowadays,mostimprovedfractalimagecodingalgorithmsareinthecostofthedecreaseofthedecodedimage．AfastoptimalblockmatchinginmotionestimationnamedFGSEisfeaturedbyprovidingasequenceoffinegrainedboundarylevelsinanaimtoreje

6、ctacheckingcandidateasearlyaspossible．ALemmawasintroducedtodescribetherelationshipbetweenFICandFGSE．AndthenFGSEcanbeusedinthesearchprocessforthematchedblocksinFIC．③Amultipledescriptionscodingalgorithmbasedonfractalimagecodingisproposedinsectionfive。M

7、ultipledescriptionscoding(MDC)hasemergedasanattractiveframeworkforrobusttransmissionoverunreliablechannels．Inthisthesis,FICisintroducedintoMDCaftertransformingtheparameters．Meanwhile，thefastfractalimagecodingalgorithmbasedonFGSEintroducedaboveisalsou

8、sedinthealgorithmtospeeduptheimagecodingfurther．KEYWORDS：FIC，Variance，FGSE，Lemma,MDC，MDLVQ，MDSQCLASSNo：致谢本论文的工作是在我尊敬的导师赵耀教授的悉心指导下完成的，从开始选题到最后的论文完成，无不倾注着导师的大量心血。当科研工作陷入困境时，赵耀教授总是给予我启迪和帮助，当论文工作进展顺利时，赵耀教授总是鼓励我再接再厉。同时赵教授严谨的治学态度、科学的工作方法、渊博的知识、敏锐的洞察力给我留下了深