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500 个结果
  • 简介:InterferometricSyntheticApertureRadar(InSAR)allowsproductionofhighresolutionDEManddetectionofsmallearthmotionsusingmultiplepassSARdatasetsobtainedbyremotesensingsatellite.ButthewholeprocesshasnotyetreachedsufficientrobustnesstowarrantautomatedDEMproductionascommonlyproducedbystereovisionwithopticalimages.TheautomaticalgorithmforprecisionregistrationisoneofthebottlenecksinInSARdataprocessing.Inthispaper,anautomaticapproachwithmulti-stepimagematchingalgorithmispresented.Allproceduresareautomaticallyimplemented.TheexperimentiscarriedoutsuccessfullywithSIR-C/L-bandInSARdata.Thetriangularpiecewiserectificationisalsoadvancedinreducinglocaldistortionbetweentheimagesandprocessingthelargesceneimage.Theprimaryresulthasprospectintheprecisionregistrationfortherepeat-trackInSARdataandrevealsthepotentialofthepresentedautomaticstrategy.

  • 标签: INTERFEROMETRY RADAR REGISTRATION IMAGE MATCHING
  • 简介:<正>QUESTION:I’mtheCEOofaforeigncorporation,ourcompanywanttosetupaChinese-foreignjointventureinChinesethisyear.Buttothisday,wedon’tknowhowtohandletheproceduresoftheregistrationfortaxationofourjointventure.Pleasetellusthedetails;we’llbeextremelygratefultoyourhelp.

  • 标签: VENTURE grateful handle REGISTRATION DETAILS corporation
  • 简介:客观:等待的病人预定设计一个软件在平淡的内部放射性核种照耀治疗自动地做复杂、多重的计算避免错误并且弄短。方法:软件在MicrosoftWindowsXP操作系统上被设计。可视化Basic5.0和微软存取2000分别地被用作这里的程序语言和数据库系统。数据和DBGrid控制和可视化Basic的VB数据窗户指南习惯于的控制存取和存取数据库。结果:任何放射性核种的放射性能不仅是计算的,而且为甲状腺机能亢进或甲状腺癌症和总数的治疗的管理的全部的碘剂量为恶意的肿瘤的骨头转移的补救管理153个Sm-EDTMP答案能在外面是ciphered。结论:当软件能自动地做复杂、多重的计算时,工作变得更容易、更快、更正确、有趣。病人的信息,诊断和治疗能为进一步的学习被记录。

  • 标签: 放射性 核衰变 视觉基础 数据库管理
  • 简介:Underthecomprehensivedeepeningreformandpromotingnewurbanization,Chinalaunchedanewroundofreformofhouseholdregistrationsystem.Reformhasamajorbreakthroughinfiveareas:toimplementnewurbanizationstrategyofhuman-centric,toachieveequalizationofbasicpublicservicesgradually,tobreakuplandrightsandruralmigrants,toprovideprotectionforfamilymigrants,andtoincreasefinancialsupportbygovernments.Butthereformstillfacesmanydifficulties,howtodeterminetheconditionssettledbycitysizeisdifficulttoimplementeffectively,financialtransferpaymentsystemreformisfacingenormousdifficulties,aswellasthesizeoftheurbanpopulationisdifficulttodetermineetc.

  • 标签: 户籍制度改革 财政转移支付制度 城镇化战略 破口 农村移民 城市规模
  • 简介:Thispaperintroducesarobustglobalnonlinearoptimizer-differentialevolution(DE),whichisasimpleevolutionalgorithmtosearchforanoptimaltransformationthatmakesthebestalignmentoftwosetsoffeaturepoints.TomaptheproblemofmatchingintotheframeworkofDE,theobjectivefunctionisproportionaltotheregistrationerrorwhichismeasuredbyHausdorffdistance,whiletheparametersoftransformationareencodedinfloating-pointasthefunctionalvariables.ThreeterminationcriteriaareproposedforDE.Asimulationof2-dimensionalpointsetsandasimilaritytransformationarepresentedtocomparetherobustnessandconvergencepropertiesofDEwithgeneticalgorithm's(GA).AndtheregistrationofanobjectanditscontourmodelhavebeendemonstratedbyusingofDEtonaturalimages.

  • 标签: 图象处理 非线性微分演变 理想转化 函数值 收敛性
  • 简介:ChinaHasaPopulationof1.2058BilionwithHouseholdRegistrationDatafromtheMinistryofPublicSecurityshowthatbytheendof1997,China'spo...

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  • 简介:Thispaperproposesanovelregistrationmethodforaugmentedreality(AR)systemsbasedonOrientedFASTandRotatedBRIEF(ORB)andFastRetinaKeypoint(FREAK)naturalfeatures.IntheproposedORBFREAKmethod,featureextractionisimplementedbasedonthecombinationofORBandFREAK,andthefeaturepointsarematchedusingHammingdistance.Togetgoodmatchingpoints,cross-checksandleastmediansquaresareusedtoperformoutlierfiltration,andcameraposeisestimatedusingthematchedpoints.Finally,ARisrendered.Experimentsshowthattheproposedmethodimprovesthespeedofregistrationtobeinrealtime;theproposedmethodcanaccuratelyregisterthetargetobjectunderthecircumstancesofpartialocclusionoftheobject;anditalsocanovercometheeffectsofrotation,scalechange,ambientlightanddistance.

  • 标签: AUGMENTED REALITY REGISTRATION Oriented FAST and
  • 简介:一个改进图象登记方法与混合优化器基于相互的信息被建议。第一,相互的信息措施与词法坡度信息被相结合。坡度信息的本质是有大坡度大小的地点应该被排列,而且在那些地点的坡度的取向应该是类似的。第二,一个混合优化器把PSO与鲍威尔相结合算法被建议制止相互的信息功能的本地最大值并且改进登记精确性到亚象素水平。最后,multiresolution数据结构不能仅仅基于Mallat分解改进登记功能的行为,而且改进算法的速度。试验性的结果证明新方法能产出好登记结果,比关于光滑和吸引力盆以及集中速度的传统的优化器优异。

  • 标签: 最优化设计 图象处理 交互信息 计算机技术
  • 简介:陆上的3D激光扫描的获得和登记是在在三种尺寸城市印射并且当模特儿的一项基本任务。为了自动化这项任务,没有标记的登记方法被要求。基于地平线特征的存在,这份报纸建议一个新奇方法。地平线特征从全景的3D扫描被提取并且作为启用绳为合并扫描匹配的使用的绳编码了。在Bremen的古老的城市中心的建议方法的起始的结果被介绍。

  • 标签: 激光雷达 点云处理 3D 城市建模 没有标记的登记 地方识别
  • 简介:Howtoimprovetheprobabilityofregistrationandprecisionoflocalizationisahardproblem,whichisdesideratedtosolve.Thetwobasicapproaches(normalizedcross-correlationandphasecorrelation)forimageregistrationareanalysed,twoimprovedapproachesbasedonspatial-temporalrelationshiparepresented.Thismethodaddsthecorrelationmatrixaccordingtothedisplacementsinx-cirectionandy-directions,andtheregistrationposeissearchedintheaddedmatrix.Themethodovercomestheshortcomingthattheprobabilityofregistrationdecreasingwithareaincreasingowingtogeometricdistortion,improvestheprobabilityandtherobustnessofregistration.

  • 标签: 图象配准 相位相关 标准互相关 空时关联
  • 简介:Inlandmark-basedimageregistration,estimatingthelandmarkcorrespondenceplaysanimportantrole.Inthisletter,anovellandmarkcorrespondenceestimationtechniqueusingmeanshiftalgorithmisproposed.Imagecornerpointsaredetectedaslandmarksandmeanshiftiterationsareadoptedtofindthemostprobablecorrespondingpointpositionsintwoimages.Mutualinformationbetweenintensityoftwolocalregionsiscomputedtoeliminatemis-matchingpoints.Multi-levelestimation(MLE)techniqueisproposedtoimprovethestabilityofcorrespondingestimation.Experimentsshowthattheprecisioninlocationofcorrespondencelandmarksisexact.Theproposedtechniqueisshowntobefeasibleandrapidintheexperimentsofvariousmono-modalmedicalimages.

  • 标签: 医学成像 图像注册 估计 转换算法
  • 简介:Inordertoeliminatedisplacementandelasticdeformationbetweenimagesofadjacentframesincourseof3Dultrasonicimagereconstruction,elasticregistrationbasedonskeletonfeaturewasadoptinthispaper.Anewautomaticallyskeletontrackingextractalgorithmispresented,whichcanextractconnectedskeletontoexpressfigurefeature.Featurepointsofconnectedskeletonareextractedautomaticallybyaccountingtopicalcurvatureextremepointsseveraltimes.Initialregistrationisprocessedaccordingtobarycenterofskeleton.Whereafter,elasticregistrationbasedonradialbasisfunctionareprocessedaccordingtofeaturepointsofskeleton.Resultofexampledemonstratethataccordingtotraditionalrigidregistration,elasticregistrationbasedonskeletonfeatureretainnaturaldifferenceinshapefororgan'sdifferentpart,andeliminateslightelasticdeformationbetweenframescausedbyimageobtainedprocesssimultaneously.Thisalgorithmhasahighpracticalvalueforimageregistrationincourseof3Dultrasoundimagereconstruction.

  • 标签: 有弹性的登记 形态学骨骼 超声图象
  • 简介:Homologousfeaturepointextractionisakeyproblemintheopticalandsyntheticapertureradar(SAR)imageregistrationforislands.Anewfeaturepointextractionmethodusingathresholdshrinkoperatorandnon-subsampledwavelettransform(TSO-NSWT)foropticalandSARimageregistrationwasproposed.Moreover,thematchingforthisproposedfeaturewasdifferentfromthetraditionalfeaturematchingstrategiesandwasperformedusingasimilaritymeasurecomputedfromneighborhoodcirclesinlow-frequencybands.Then,anumberofreliablymatchedcoupleswithevendistributionswereobtained,whichassuredtheaccuracyoftheregistration.ApplicationoftheproposedalgorithmtoSPOT-5(multi-spectral)andYG-1(SAR)imagesshowedthatalargenumberofaccuratelymatchedcouplescouldbeidentified.Additionally,bothoftherootmeansquareerror(RMSE)patternsoftheregistrationparameterscomputedbasedontheTSO-NSWTalgorithmandtraditionalNSWTalgorithmwereanalyzedandcompared,whichfurtherdemonstratedtheeffectivenessoftheproposedalgorithm.Thealgorithmcansupplythecrucialstepforislandimageregistrationandislandrecognition.

  • 标签: 图像配准 小波变换 SAR 下采样 光学 基础
  • 简介:Segmentingwholeheartfromcardiaccomputedtomography(CTimagescanprovideanimportantbasisfortheevaluationofcardiacfunctionandhelpimprovetheaccuracyofclinicaldiagnosis.Manualsegmentationisthemostaccuratemethodforcardiacsegmentation.Butitistimeconsumingandnotsufficientlyreproducible.However,cliniciansstillrelyonthismethodinpracticalapplications.Soafullyautomaticmethodisneededtoimprovethesegmentationefficiency.Thispapeproposesaregistration-basedautomaticapproachforthree-dimensional(3DsegmentationofcardiacCTimages.TheproposedmethodutilizesthesimilarityocardiacCTimagesbetweendifferentindividuals,andusesregistrationtoachievethesegmentation.Affinetransformationisfirstlyimplementedtoachieveglobalcoarseregistration.Then,cubicB-splinesareusedtorefinethelocaldetailsinlocallyaccurateregistration.Mutualinformation(Ml)isusedasthesimilaritymeasure,andadaptivestochasticgradientdescent(ASGD)astheoptimizationalgorithm.Oumethodisappliedtothedual-sourcecardiacCTimagestosegmentwholeheartExperimentalresultsshowthattheproposedmethodcanautomaticallysegmentwholeheartfromcardiacCTimages.

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  • 简介:Redbloodcells(RBC)’flickeringpresentthedynamicpropertiesofthecytomembrane.Itscomplexitycouldbeusedforaginganalysisortheevaluationforthestoragequality.Theflickeringactivityisakindofreversibleperpendicularmotionofthespecifiedpixel.Therefore,thecomplexityanalysisdependsonthereliabledetectionoftemporalvariationforthegray-scalevaluesfromeachpixelofthecells.Inthispaper,weimprovedourpreviousworkonthescreeningofthehorizontaldriftedcellswithasurfacebasedoncellregistrationmethodandtheeffectofGSMexposuretothedynamicpropertiesoftheRBCsintermsofmulti-scalesampleentropywaspresentedinthepaper.

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