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简介：Conventionalcameracalibrationthatemployscalibrationtargetsisacommonlyusedmethodtoacquireacamera'sintrinsicand/orextrinsicparameters.Thecalibrationtargetsareusuallydesignedasperiodicarraysofsimplehigh-contrastpatternsthatprovidehighlyaccurateworldcoordinatesystempointsandthecorrespondingimagepixelcoordinatesystempoints.Theexistingpixelcoordinateextractionalgorithmscanreachasub-pixellevel;however,theytreateachsinglepatterninoneimageasanindependentindividual,whichmakesitdifficulttofurtherimproveextractionaccuracy.Inthispaper,anovelmethodisproposedbyutilizingtheperiodicarrangementcharacteristicsofthecalibrationtargetpatternasaglobalconstrainttoimprovethecalibrationaccuracy.Basedonacamera'spinholemodel,theintersectionpointoftwofittedcurvesisusedasanoptimizedpixelpointtoreplacetheinitialone.Followingthepixelcoordinateoptimizationprocedures,experimentswereperformedusingrealdatafroma3Dlaserlinescannerandadynamicprecisioncalibrationtarget.Ourresultsshowthattherelativeerrorsofcamerahomographymatrixelementsobtainedbytheproposedoptimizationmethodwerereducedcomparedwiththecommonlyusedmethod.Theaveragecoordinatemeasurementaccuracycanbeimprovedbynearly0.05mm.Itisshownthattheproposedoptimizationmethodcanenhancethecameracalibrationaccuracy,especiallywhentheextractedpixelsareofpoorerprecision.

简介：BasedonallthefeaturesoftheKLOEonlinesoftware,theonlinecalibrationsystemperformscurrentcalibrationqualitycheckinginrealtimeandstartsautomaticallynewcalibrationprocedureswhenneeded.Acalibrationmanagerprocesscontrolsthesystem,implementingtheinterfacetotheonlinesystem,receivinginformationfromtheruncontrolandtranslatingitsstatetransitionstoaseparatestatemachine.Itactsasa"calibrationruncontroller"andperformsfailurerecoverywhenrequestedbyasetofprocesscheckers.Thecoreofthesystemisamulti-threadedOOhistogramserverthatreceiveshistogrammingcommandsbyremoteprocessesandoperatesonlocalROOThistograms.AclientlibraryandC,fortranandC++applicationinterfacelibrariesallowtheusertoconnectanddefinehisownhistogramorreadhistogramsownedbyothersusinganbool-likeinterface.Severalcalibrationprocessesrunninginparallelinadestributed,multiplatformenvironmentcanfillthesamehistograms,allowingfastexternalinformationcheck.Amonitorthreadallowremotebrowsingforvisualinspection,Pre-filtereddataarereadinnonprivilegedspymodefromthedataacquisitionsystemviatheKloeIntegratedDataflow,privilegedspymodefromthedataacquisitonsystemviatheKoleIntegratedDataflow.Themaincharacteristicsofthesystemarepresented.

简介：Amomentactuatorwithdirectdetectionofforcesisdescribed,Momentfrequencyre-sponseandmomentexcitationpurityasperformancecriteriaareproposed.Methodsfortheperfor-mancecalibrationoftheactuatorarepresented.Assessmentiscarriedoutbymeansofthereciprocityprinciple.

简介：一部新款奔驰S280更换发动机控制模块后,使用STAR2000编程巡航功能不起作用,读取发动机和巡航控制系统故障码,没有故障码.我们所使用的编程方法是,读取旧控制模块上的程序,再写到新控制模块上.按编程方法应该没错,为什么巡航功能被取消呢?带着这一问题,我们一起学习奔驰编程新方法,FlashingandSoftwareCaiibrationNumber(SCN)闪存和软件校正码.

简介：这篇论文集中于从一条革命的侧面的图象校准一个针孔照相机的问题。在这篇论文，广泛地利用的革命过时的人或物和从侧面的照相机刻度的一种实际、精确的技术的侧面的图象的对称独自被开发了。与为照相机刻度的传统的技术相比，例子，它可以涉及拿某精确用机器制造的刻度模式的图象(例如一个刻度格子)，或为决定的边察觉消失经常远离图象的点集中或甚至做不身体上存在，或能数字地不稳定的基本矩阵和Kruppa方程的计算，这里介绍的方法使用就革命的侧面，它通常在日常生命被发现(e。g。碗和花瓶)，反对由于减少的费用和刻度的增加的可接近性使这个过程更容易。这篇论文第一分析在革命的侧面和一个照相机的内在的参数的对称性质之间的关系，然后显示出怎么使用革命的侧面的图象为决定内在的参数提供足够的信息。在这个过程期间，高度精确的侧面抽取算法也被使用了。最后，从真实数据的结果被介绍，表明建议方法的效率和精确性。

简介：ＲｅｌａｔｉｖｅＥｎｅｒｇｙＣａｌｉｂｒａｔｉｏｎｆｏｒＭｅａｓｕｒｅｍｅｎｔｏｆＰａｒｔｉｃｌｅＣｏｒｒｅｌａｔｉｏｎｓ￥ＤｕａｎＬｉｍｉｎ；ＬｉＺｕｙｕ；ＪｉｎＧｅｎｍｉｎｇ；ＨｅＺｈｉｙｏｎｇ；ＬｕｏＱｉｎｇｚｈｅｎｇ；ＷｕＨｅｙ...

简介：Thispaperdescribesthestructure,geometricmodelandgeometriccalibrationofPhotogrammetronI-thefirsttypeofphotogrammetronwhichisdesignedtobeacoherentstereophotogrammetricsysteminwhichtwocamerasaremountedonaphysicalbasebutdrivenbyanintelligentagentarchitecture.Thesystemcalibrationisdividedintotwoparts:thein-labcalibrationdeterminesthefixedparametersinadvanceofsystemoperation,andthein-situcalibrationkeepstrackingthefreeparametersinreal-timeduringthesystemoperation.Inavideosurveillanceset-up,preparedcontrolpointsaretrackedinstereoimagesequences,sothatthefreeparametersofthesystemcanbecontinuouslyupdatedthroughiterativebundleadjustmentandKalmanfiltering.

简介：WiththehelpofCCDimages,therealizationofhighprecisionpo-sitioningandmeasurementhasbecomethebasicstandardformachinevisionandrealtimephotogrammetrysystems.However,deformationandothersortsofdegradationoccurringduringtransmissionaremajorlimitingfactorsofthepreci-sionattainablewithmostcurrentCCDcamerasandframegrabbers.SoapreciseradiometricandgeometrictransmissionofimagesfromCCDsensortomemoryisafundamentalaspectofCCDcameracalibration.Thegeometriccalibrationsystem,whichusessomeimageprocessingalgorithmsoftheCCDcamerabasedonthere-searchedanddevelopedsystemisdiscussed.Thereliabilityandvalidityarealsodiscussed.TheexperimentalresultsforthecalibrationoftheCCDarraywillbetakenasanimportantqualityindexforCCDevaluation.

简介：在变换模拟调查和传统的靠近的范围摄影测量学的地里，由商业数字照相机调查目标到目前为止被开发了，这种技术在生产的每部分广泛地被使用。以便得到目标的三维的信息，商业数字照相机必须被检验。很长时间，数字照相机被DLT检验了。当时，一定有高精确的控制域。为没有控制点，认识到调查，为自我刻度的一个方法被建议。

简介：Aimingattheproblemthatthereisn'tanystandardizedcalibrationmethodfortheperformanceindexofsurfaceplasmonresonance(SPR)sensor,thecalibrationmethodforkeyperformanceindicesofSPRsensorissummarizedandproposedbasedonthecomparisonofrelativemethodsanddefinitionofeachindex.Experimentaldataofsucrosesolutionswithvariousconcentrationsareobtainedbytheself-buildingSPRinstrument,andthenthecalibrationmethodisusedtodeterminetheperformanceindices,suchasnoise,drift,sensitivity,resolution,linearity,dynamicrangeandreproducibility.Experimentalresultsshowthatthedefinitionofindicesisreasonable,andthecalibrationmethodiscorrect,whichhasgreatsignificanceforperformanceevaluationofSPRsensor.

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简介：Inthetest-fieldcalibration,multi-azimuthstereoimagepairsareproducedoftheoutdoorlargecontrol-fieldbythestereo-visionsystemundercali-bration.Whileintheanalyticalprocessing,therelationshipbetweenimagepairsisadoptedasaconstraintcondition,whichensuresthestabilityandqualityofthecalibrationresults.Thispaperintroducesthedeductionprocessoftheconstraintconditions.

简介：Thecurrentcalibrationfunctionusedincalculatingthemagnitudeofnaturalearthquakeswithin5kmisaconstant;afactthatcausesseveralseriousdifficultiesforthecalculationofthemagnitudeofsmallandshallow-focusearthquakes.Accordingtotheattenuationlawofexplosionsandthepropagationtheoryofelasticwaves,thecalibrationfunctioniscalculatedfornearfieldquakesfrom0kmto5km.Magnitudesoftwoaftershocksequencesarecalculated.Themagnitudesofmostexplosionearthquakesaresmall,rangingmainlyfrommagnitude0.5to1.0.TheM-tchartoftheexplosiveaftershocksiscompletelydifferentfromthatofstrongearthquakeaftershocks.Itnotonlyshowspositivecolumnarlinesindicatinglargemagnitudesbutalsoshortnegativecolumnarlinesindicatingsmallmagnitudes.

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简介：Ｔｈｅｃａｌｉｂｒａｔｉｏｎｏｆｍｅａｓｕｒｉｎｇｅｑｕｉｐｍｅｎｔｆｏｒｔｈｅｏｂｓｅｒｖａｔｉｏｎｏｆｓｅｉｓｍｏ－ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｅｍｉｓｓｉｏｎＱｕａｎ－ＸｉＺＨＡＮＧ（张全喜），Ｘｉｎ－ＭｉｎＬＩ（李新民）ａｎｄＭｉｎｇ－Ｃａ...

简介：Arraycalibrationisimportantinengineeringpractice.Inthispaper,fastcalibrationmethodsforaULA'sgainandphaseerrorsbothinfarandnearfieldsareproposed.Inthefarfield,usingasinglesoundsourcewithoutexactorientation,thismethodhorizontallyrotatesthearrayexactlyonce,performseigenvaluedecompositionforthecovariancematrixofreceiveddata,thencomputesthegainandphaseerroraccordingtotheformulas.Inthenearfield,usingthesamesinglesoundsource,itisnecessarytorotatethearrayhorizontallyatmostthreetimes,buildequationsaccordingtogeometricrelations,thensolvethem.Usingtheformulaproposedinthispaper,sphericalwavesaremodifiedintoplanewaves.Theneigenvaluesdecompositionisperformed.Thesetwocalibrationmethodswereshowntobevalidbysimulationandarefast,accurateandeasytouse.Finally,ananalysisoffactorsinfluencingestimationprecisionisgiven.

简介：Calibratingasmallfieldcameraisachallengingtaskbecausethetraditionaltargetwithvisiblefeaturepointsthatfitthelimitedspaceisdifficultandcostlytomanufacture.Wedemonstrateanovelcombinedtargetusedincameracalibration.Thetangentpointssuppliedbyonecirclelocatedatthecenterofasquareareusedasinvisiblefeatures,andtheperspectiveprojectioninvarianceisproved.Bothvisibleandinvisiblefeaturesextractedbytheproposedfeatureextractionalgorithmareusedtosolvethecalibration.Thetargetsuppliesasufficientnumberoffeaturepointstosatisfytherequirementsofcalibrationwithinalimitedspace.Experimentsshowthattheapproachcanachievehighrobustnessandconsiderableaccuracy.Thisapproachhaspotentialforcomputervisionapplicationsparticularlyinsmallfieldsofview.

简介：计算机图形和人的计算机相互作用的许多最近的应用程序作为输入设备采用了颜色照相机和深度照相机。因此，拿不同颜色和深度的硬件的两种类型的有效刻度输入被要求。我们的途径移开在明确地象在深度和颜色照相机之间的转变一样解决照相机intrinsics的以前的方法使用非线性的优化的数字困难。混合参数的一个矩阵被介绍线性化我们的优化。混合参数从深度提供转变参量的空格(深度照相机图象)到一种颜色由从深度照相机联合深度照相机和旋转转变的内在的参数到颜色的参量的空格(颜色照相机图象)照相机。旋转转变和内在的参数能明确地在标准QRfactorisation的帮助下从我们的混合参数被计算。我们与地面真相深度信息被微软Kinect捕获的综合数据和真实世界的数据测试我们的算法。当由于使用混合参数的优点花少得多计算时间(Herreras方法的1/50和Raposos方法的1/10)时，实验证明我们的途径能向刻度的可比较的精确性提供最先进的算法。

简介：Weintroduceanovelmethodtoaccuratelyextracttheopticalparametersinterahertzreflectionimaging.Ourmethodbuildsonstandardself-referencingmethodsusingthereflectedsignalfromthebottomoftheimagingwindowmaterialtofurthercompensatefortime-dependentsystemfluctuationsandposition-dependentvariationinthewindowthickness.Ourproposedmethodnotonlyimprovestheaccuracy,butalsosimplifiestheimagingprocedureandreducesmeasurementtimes.