High Precision Image Restoration Based on Kalman Filter for Optical Remote Sensed Images
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摘要: 光学卫星成像系统调制传递函数(MTF)的准确量测是高质量影像复原的基础。传统的MTF测量方法忽略了卫星平台振动、影像噪声等因素的干扰,导致测量结果与真实值存在较大偏差,不利于影像质量的提升。本文在分析现有MTF测量方法的基础上,提出了基于卡尔曼滤波的高精度MTF测量方法,该方法利用卡尔曼滤波对实测的线扩展函数(LSF)进行迭代处理,获取无干扰的LSF,为影像复原质量的提高奠定基础。本文利用国产高分辨率卫星成像数据进行实验,采用边缘能量、对比度、奈奎斯特频率值作为复原前后影像质量评价的依据,实验结果表明,采用本文方法获取的MTF进行复原的影像无论是在边缘保持还是噪声抑制方面都优于传统方法。Abstract: HighprecisionMTFmeasurementisthebasisofhighqualityimagerestoration.Giventhepresenceofnoiseinimagesandvibrationfromthepayload,traditionalMTFmeasurementbasedonthetargetimagewillproduceabiasedresult,andthebiasedresultwillintroducenewnoiseafterim agerestoration.Inthispaper,basedonanalysisofcharacteristicsandlimitationsoftraditionalimagerestorationmethod,weproposeanimagerestorationapproachbasedonhighprecisionMTFmeasure mentusingtheKalmanfilter.ThisapproachfirstlyusesGuassianfittingtoobtaintheoreticalvalueofthelinespreadfunctionfromthemeasuredvalue,thenitusestheKalmanfiltertoobtainthetrueval ueofthelinespreadfunctionfromtheoreticalvalueandmeasuredvalue.ExperimentsonTDI CCDimagesshowthattheapproachproposedinthispaperyieldbetterperformancethantraditionalimagerestoration,especiallyforthewaterareaswhichcontainlesstextureandcityareaswhichcontainsrichtexture.
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Key words:
- opticalimagingsystem /
- imagerestoration /
- Kalmanfilter /
- modulationtransferfunction /
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[1] HelderD,ChoiT,RangaswamyM.In flightChar acterizationofSpatialQualityUsingPointSpreadFunctions[J].犐狀狋犲狉狀犪狋犻狅狀犪犾犛狅犮犻犲狋狔犳狅狉犘犺狅狋狅 犵狉犪犿犿犲狋狉狔犪狀犱犚犲犿狅狋犲犛犲狀狊犻狀犵，２００４，２：１４９１７０[2] ChoiT.IKONOSSatelliteOn orbitModulationTransferFunctionMeasurementUsingEdgeandPulseMethod[D].SouthDakotaState:SouthDa kotaStateUniversity,2002[3] QiuXiaojun.TheStudyofMTFImageRestorationMethod[D].Nanjing:NanjingUniversityofSci enceandTechnology,2006(邱晓君.基于MTF遥感影像恢复技术研究[D].南京:南京理工大学,2006)[4] HelderD.On orbitModulationTransferFunctionMeasurementsforIKONOSandQuickBird[D].SouthDakotaState:SouthDakotaStateUniversity,2006[5] DennisL.IKONOSSatelliteinOrbitModulationTransferFunctionMeasurementUsingEdgeandPulseMethod[D].SouthDakotaState:SouthDa kotaStateUniversity:2002[6] GePing,WangMi,PanJun,etal.AStudyofA daptiveMTFImageRestorationofHighResolutionTDI CCDImageData[J].犚犲犿狅狋犲犛犲狀狊犻狀犵犳狅狉犔犪狀犱牔犚犲狊狅狌狉犮犲狊，２０１０（４）：２３２８（葛平，王密，潘俊，等．高分辨率ＴＤＩＣＣＤ成像数据的自适应ＭＴＦ影像复原处理研究［Ｊ］．国土资源与?校玻埃保埃ǎ矗?3 28)[7] JiangPeng,YeShirong,HeShujing,etal.Groud basedGPSTomographyofWetRefractivitywithA daptiveKalmanFilter[J].犌犲狅犿犪狋犻犮犪狀犱犐狀犳狅狉犿犪 狋犻狅狀犛犮犻犲狀犮犲狅犳犠狌犺犪狀犝狀犻狏犲狉狊犻狋狔，２０１３，３８（３）：２９９３０２（江鹏，叶世榕，何书镜，等．自适应Ｋａｌｍａｎ滤波用于ＧＰＳ层析大气湿折射率［Ｊ］．武汉大学学报·信息科学版,2013,38(3):299 302)[8] YueQingxing,QiuZhenge,JiaYonghong,etal.ResearchonImageSimulationofSatelliteThree Line ArrayTDI CCDCamera[J].犌犲狅犿犪狋犻犮犪狀犱犐狀 犳狅狉犿犪狋犻狅狀犛犮犻犲狀犮犲狅犳犠狌犺犪狀犝狀犻狏犲狉狊犻狋狔，２０１０，３５（１２）：１４２７１４３１（岳庆兴，邱振戈，贾永红，等．三线阵ＴＤＩＣＣＤ相机在轨成像数学仿真方法［Ｊ］．武汉大学学报·信息科学版,2010,35(12):1427 1431)[9] ForsterBC,BestP.EstimationofSPOT犘ｍｏｄｅＰｏｉｎｔＳｐｒｅａｄＦｕｎｃｔｉｏｎａｎｄＤｅｒｉｖａｔｉｏｎｏｆａＤｅｃｏｎｖｏ lutionFilter[J].犐犛犘犚犛犑狅狌狉狀犪犾狅犳犘犺狅狋狅犵狉犪犿犿犲 狋狉狔犪狀犱犚犲犿狅狋犲犛犲狀狊犻狀犵，１９９４，４９（６）：３２４２［１０］ＧｕＸｉｎｇｆａ，ＬｉＸｉａｏｙｉｎｇ，ＭｉｎＸｉａｎｇｊｕｎ，ｅｔａｌ．ＯｎorbitMeasurementandCompensationofMTFforCBERS02BCCDImages[J].犛犮犻犲狀犮犲犻狀犆犺犻狀犪犛犲狉犈犐狀犳狅狉犿犪狋犻狅狀犛犮犻犲狀犮犲，２００５，３５（Ｂ１２）：２６４０（顾行发,李小英,闵祥军,等.CBERS02B卫星CCD相机MTF在轨测量及影像MTF补偿[J].中国科学,2005,35(B12):26 40)[11] FonsecaLMG,PrasadGSD,MascarenhasNDA.CombinedInterpolationRestorationofLand satImagesThroughFIRFilterDesignTechniques[J].犐狀狋犲狉狀犪狋犻狅狀犪犾犑狅狌狉狀犪犾狅犳犚犲犿狅狋犲犛犲狀狊犻狀犵，１９９３，１４(13):2547 2561[12] PanZhiqiang,GuXingfa,LiuGuodong,etal.Rel ativeRadiometricCorrectionofCBEERS 01CCDDataBasedonDetectorHistogramMatching[J].犌犲狅犿犪狋犻犮犪狀犱犐狀犳狅狉犿犪狋犻狅狀犛犮犻犲狀犮犲狅犳犠狌犺犪狀犝狀犻 狏犲狉狊犻狋狔，２００５，３０（１０）：９２５９２７（潘志强，顾行发,刘国栋,等.基于探元直方图匹配的CBERS 01星CCD数据相对辐射校正方法[J].武汉大学学报· 信息科学版,2005,30(10):925 927) -
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