视频图像超分辨率复原

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1、北京工业大学硕士学位论文视频图像超分辨率复原姓名：纪现才申请学位级别：硕士专业：计算机应用指导教师：苏开娜2003.5.1ABSTRACTSupe卜resolutionrestorationofvideosequencesisuse向la工1doftencriticalinmanyexisting印plications．Someimagingsystemsemploydetectorarrayst11atarenotsumcientlydensetomeetmeNyquistcriterionduringimageacquisition．Therefore

2、，thespatialresolutiona缸brdedbytheopticscaIl’tbefullyutilizedinsuchimagingsystems．Thispaperresearchesandimprovestwoimportantalgorithrnstoreconstructhi曲resolutionimages，withreducedaliasing，厅omasequencesofundersampledrotateda11dshiRedf}锄es．Thereconstructedimageresolutionisfbm柳otofoIl

3、rtimeshighertllantheundersampled丘姗es．111thispaperamotioncompensationiteratiVealgorithmisdesignedbaseonthemultipleinputrestoration“gorimmforenhancingtheres01utionofmonocllromeaIldcolorimagesequences．Ⅵnousapproachestowardmotionestimationareinvestigateda11dcomparedImpmVingthespatialr

4、esolutionofanimagesequencesc—ticallyd印endsupontheaccuracyofmemotionestimatoLParticularattentionispaidtotheuseofthecolorcharmelsinestimatingthemotion．Themainpremiseisthattllreediffcrentintensitych锄elsconveyingthesalnemotioninfonnationandyieldingmoreaccuratemotionestimates．Experimen

5、tsareperfomledonmonochrameandcolorimagesequences，a11dperfo哪anceisme嬲uredbythepeaksi弘a1tonoiseratio(PSNR)．IncoI巧ugategradientop缸mizationalgorithrn，thecontinuousanddigitalmodelsofa：nimagingsystemaredefinedtoexplainimageacquisition，ttleimageregistrationalgorithmandtheconjugateFadient

6、reconstmctionalgorithrnarcdesi朗ed．Experimentresultsshowmattheconjugate掣adientreconsmlctionalgorimmisrobust，r印idconvergent，andmemorysaved．Thisalgorit}Ⅱnispronetobeextendedandmal(eitpossiblethatmultiplesensordata如sionconstnlctshighresolutionimages·JiXian—Cai[Applicationofcomputer]Di

7、rectedbySuKai—naKeywords：Super-resolutionRestoration，MotionEstimation，MotionCompensation，SystemPointSpreadFunction，hnageRe舀stration，ConjugateGradient0ptimization．n．第一章引言1．1超分辨率复原的主要概念超分辨率(Super-resolution)是去除由成像系统造成的模糊(散焦模糊、运动模糊、非理想采样等)以及复原超出光学系统衍射极限之外的空间频率信息⋯【42]。视频图像复原是指由于光学模糊(包

8、括线形运动或散焦模糊(out．offocus))会造成视频图像的退