简介：Onthebasisofathoroughunderstandingofthephysicalcharacteristicsofremotesensingimage,thispaperemploysthetheoriesofwavelettransformandsignalsamplingtodevelopanewimagefusionalgorithm.ThealgorithmhasbeensuccessfullyappliedtotheimagefusionofSPOTPANandTMofGuangdongprovince,China.Theexperimentalresultsshowthataperfectimagefusioncanbebuiltupbyusingtheimageanalyticalsolutionandre-constructionintheimagefrequencydomainbasedonthephysicalcharacteristicsoftheimageformation.Themethodhasdemonstratedthattheresultsoftheimagefusiondonotchangespectralcharacteristicsoftheoriginalimage.

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简介：Inthisdissertation,sereralkeyproblemsinthefieldofsteganographicimagesecurityaremainlystudiedanddiscussed:(1)Anovelkindofimagecryptosystemisstudied.Theencryptedinformationofsecretimageisembeddedintoanordinaryimage,whichcanbetransmittedpublicly,anditwillnotcauseattentionofillegaleavesdropper.Thefollowingresultsareachieved:(a)Theimagehidingalgorithmanditsimprovedalgorithmbasedonwavelettransformandvectorquantizationareproposed,andbothalgorithmsembedthesecretimageaftertakingfulladvantageofwavelettransform(WT)tocompressit.(b)IntroducingtheCDMAconceptincommunicationtheory,anovelkindofimagecryptosystem—imagehidingcryptosystemofimagedivisionmultipleaccessisproposed.Weencryptkeyinformationofseveralsecretimagesandthenhidethemintoanimage,whichisanordinaryimage.Afterreceiversgettheimage,eachreceivercanrestorecorrespondingsecretimageindependently.Comparedwithotherimageencryptionalgorithms,ournewimagehidingcryptosystemcancompresssecretimagedataefficiently.Moreover,thesecurityandpracticabilityofoursystemisbetter.(2)Digitalwatermarkingisthemostimportantbranchofinformationhiding,whichhasbeenthehotspotofinternationalacademia.Digitalwatermarkinghasbeenproposedasasolutiontotheproblemofcopyrightprotectionofmultimediadocumentsinnetworkedenvironments.Inthisfield,thefollowingresultsareachieved:(a)AnewfrequencyinformationhidingandwatermarkingalgorithmbasedonWTandDiscreteCosineTransform(DCT)ispresented.AftercompressedbyWT,theinformationofsecretimageisembeddedintoDCTdomain.ThealgorithmhasgoodimperceptibilityandsecurityandisrobustagainstJPEGcompressingandcropping.Thealgorithmcanbeusedtoembedwatermarkintoimages,andthewatermarkmaybeone256-colorpictureormoreandmorethanonesecretimagecanbehiddenintoasinglecarrierimage.(b)Anovelwatermarkingalg

简介：基于本地HSV，图象和对象的形状反对认出的一个方法为机器人追踪被建议。在颜色片断以后，目标的形状的知识被用来认出目标。追踪结果的机器人证明方法的可获得性。

简介：WorkhasbeendonewithextendingtheusefulimaginganddetectionrageofCCD.ThiswasaccomplishedthroughdirectopticalcouplingandbondingofimageintensifierstotheCCD.IthasbeenshownthattheusefulrangeofaCCDmaybeextendedtwoordersofmagnitudeusingthesetechniquesincouplingamicrochannelplateimageintensifiertotheCCDarray.AlloftheseworksweredonewithpresentlyavailableCCDmadebyChina

简介：磅(基于地点的服务)是从GIS的发展的显著结果到geospatial信息服务。从下一代因特网和网提供的群众和机会由geospatial信息的要求面对了2.0，geospatial信息服务的一个新模型基于DMI(数字可测量的图象)被介绍。首先，磅的概念和网2.0的机会被介绍，然后，DMI的特征被讨论。拿图象城市

简介：质地分析经常在处理领域的图象被讨论，但是大多数方法在灰色级的图象或颜色图象以内是有限的，并且质地的现在的概念主要基于单身的乐队的灰色级的图象被定义。遥感图象的必要字符之一多维或甚至高度维，并且传统的质地概念不能为这些包含足够的信息。因此，一个合适的质地定义基于遥感想象，对追求必要，它是在这份报纸的第一讨论。这份报纸描述印射的模型光谱在用Markov随机的地(MRF)的二维的图象空格的向量，基于MRF，和分析建立multiband遥感图象的一个质地模型吉布斯的计算势能和吉布斯参数。进一步，这份报纸也分析传统的吉布斯模型的限制，比较喜欢避免参数的评价的一个新吉布斯模型，并且以后介绍为hyperspectral遥感图象的一个新质地分割算法。

简介：为了更方便地并且更快速理解超声图象的内容，在这份报纸，我们建议一个coarse-to-fine超声图象captioning整体模型，它能自动地产生由相关n克构成在超声图象描述疾病信息的注解文章。首先，在超声图象的机关被粗糙的分类模型检测。第二，超声图象被相应有细密纹理的分类模型根据机关标签编码。最后，我们输入编码向量到产生模型自动地产生的语言产生模型，和语言在超声描述疾病信息的注解文本想象。在我们的实验，编码模型能在超声图象识别获得高精确性率。并且语言产生模型能自动地产生高质量的注解文本。在实际应用，coarse-to-fine超声图象captioning整体模型能帮助病人和医生获得很好超声图象的内容理解。

简介：Thispaperpresentssomeresultsoftherelationbetweenwavelettransformandfractaltransform.Thewavelettransformoftheattractoroffractaltransformpossesestranslationalandscaleinvariance.Sowespeedthefractalimageencodingbytestingtheinvarianceofthewavelettransformappropriateforimageencoding.Theclassficationschemeofrangeblocksbywavelettransformisgiveninthispaper.

简介：Theregularizedimageinterpolationmethodiswidelyusedbasedonthevectorinterpolationmodelinwhichdown-samplingmatrixhasverylargedimensionandneedslargestorageconsumptionandhighercomputationcomplexity.Inthispaper,afastalgorithmforimageinterpolationbasedonthetensorproductofmatricesispresented,whichtransformsthevectorinterpolationmodeltomatrixform.Theproposedalgorithmcanextremelyreducethestoragerequirementandtimeconsumption.Thesimulationresultsverifytheirvalidity.

简介：ReconstructinganHR(high-resolution)imagewhichpreservestheimageintrinsicstructuresfromitsLR(low-resolution)counterpartishighlychallenging.Thispaperproposesanewsurfacereconstructionalgorithmappliedtoimageinterpolation.Theinterpolationsurfaceforthewholeimageisgeneratedbyputtingallthequadraticpolynomialpatchestogether.Inordertoeliminatethejaggiesoftheedge,anewweightfunctioncontainingedgeinformationisincorporatedintothepatchreconstructionprocedureasaconstraint.Extensiveexperimentalresultsdemonstratethatourmethodproducesbetterresultsacrossawiderangeofscenesintermsofbothquantitativeevaluationandsubjectivevisualquality.

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简介：Specklefilteringofsyntheticapertureradar(SAR)imageswhilepreservingthespatialsignalvariability(textureandfinestructures)stillremainsachallenge.ManyalgorithmshavebeenproposedfortheSARimagerydespeckling.However,simulatedannealing(SA)methodisoneofexcellentchoicescurrently.AcriticalprobleminthestudyonSAistoprovideappropriatecoolingschedulesthatensurefastconvergencetonear-optimalsolutions.Thispapergivesanewnecessaryandsufficientconditionforthecoolingschedulesothatthealgorithmstateconvergesinallprobabilitytothesetofgloballyminimumcoststates.Moreover,itconstructsanappropriateobjectivefunctionforSARimagedespeckling.AnexperimentalresultoftheactualSARimageprocessingisobtained.

简介：Anewmethodforconstructingafittingsurfaceonatriangulargridispresented.Assumingimagesareobtainedbysamplingfromtheoriginalscene.Conventionalpolynomialinterpolationmethodsgenerallyconstructthefittingsurfaceonasquaregrid.Differentfromexistingmethods,thenewmethodconstructsthefittingsurfaceonatriangulargridwhichcandividetheoriginalsurfacemoredetailedandimproveapproximationaccuracy.Asthequalityoftheimageedgesplaysakeyroleinvisualeffectsofimage,thenewmethodusesimageedgesasconstraintstogetatrianglegrid.Thenewmethodconstructsacubicpolynomialpatchlocallyusingimagedatatoapproximatetheoriginalsurface.Experimentalcomparisonresultsofthenewmethodwithothermethodsshowthatthenewmethodcanproducehigh-qualityimagesandremovethezigzaggingartifact.

简介：Inthispaper,anewtechniqueisproposedforrotation,scalingandtranslation(RST)invariantimagewatermarkingbasedonlog-polarmappings(LPM)andphase-onlyfiltering(POF).ThewatermarkisembeddedintheLPMofFouriermagnitudespectrumoftheoriginalimage,andasmallportionofresultingLPMspectrumisusedtocalculatethewatermarkpositions.Thistechniqueavoidscomputinginverselog-polarmapping(ILPM)topreservethequalityofthewatermarkedimage,andavoidsexhaustivesearchtosavecomputationtimeandreducefalsedetection.Experimentalresultsdemonstratethatthedigitalwatermarkingtechniqueisinvariantandrobusttorotation,scaling,andtranslationtransformation.

简介：ThisletterintroducescolorconstancyandRetinextheoryforimageenhancement.Itclas-sifiesRetinexalgorithmsintofourcategoriesandprovidestheirprinciplesandimplementationsingeneral.TheexperimentalresultsofFrankle-McCann,MSR(Multi-ScaleRetinex)andPNSD(Pro-jectedNormalizedSteepestDescent)Retinexalgorithmsarepresentedandcompared.Moreover,varianceandaveragegradientareproposedtoevaluatetheperformanceofthedifferentalgorithms.

简介：Microcirculationimagesoftenhavelowqualityinacquisitionprocess,whichaffectthefollowingstepsofprocess.ThispaperintroducesenhancementalgorithmbasedonnonsubsampledContourlettransform(NSCT).Itanalyzesthecharacteristicsofthemicrocirculationimagesgenerated,andseparatesmicrocirculationimagestolightweightandthereflectionweight.ItalsoanalyzestheconstructionmethodonNSCTandprovesthatthismethodcanbeappliedonmicrocirculationimageenhancementalgorithm.Tocorrectlightweightofmicrocirculationimageandobtainenhancementimagetheenhancementmicrocirculationimagewasnotonlysuperiortotheoriginalimagevisually,butalsoimprovedobjectivedataobviously.Thealgorithmsprovideanewmethodtomicrocirculationimagepre-processingandguidethelatterstepsoftheimageprocessing.

简介：Inimagereconstructionalgorithms,thechoicesoffilterfunctionsandinterpolatingfunctionsareveryimportantforthecomputationalspeedandthequalityoftheimagereconstructed,especially,forfan-beamgeometry,theoccurrenceofthesingularintegraloperatormayleadtosomegreatoscillationscomparedtotheoriginalimage.Inthispaperwewillgiveadirectconvolu-tionalgorithmwhichneedsnotthecomplexcomputationsoccuringintheFouriertransform,thenusingacircleintegralweobtainastablecomputationalprogram.Differentfromallotherpreviouswindowfunctionsusedbymanypioneerresearchers,inouralgorithmwechooseawindowfunctionsimilartoGabor'swindowfunctione-x^2/2,whichcanberegardedastheapproximationtotheinverseFouriertransformofalocallyintegrablefrequencyfunction.AlsowepointoutthatsuchreconstructionalgorithmprocedurescanbeusedtodealwiththeSPECTprojectiondatawithconstantattenuation.

简介：Someshortcomingsofcommonfractalimagecodingmethodsarestudied,thentheyarecorrectedwithanewmethod.ThenewmethodisimprovedfurtherinDCTdomain.Codingresultsshowtheadvantageofthenewmethod.