简介：顺序的点树提供最先进的技术因为使点模型变为，由重排层次根据为快显示在GPU上跑的几何错误顺序指。这篇论文论述一个看法依赖者方法由在层次点的顺序的表嵌入层次树结构扩充顺序的点树。由方法，二种索引被构造便于近从主要在一份订单显示到远方的点；从对粗糙好。作为结果，不可见的点能为硬件加速在高效率view-dependently被挑选，；同时，顺序的点树的优点能仍然充分被拿。因此，新方法能跑得比常规顺序的点树快得多，；当目标拥有复杂吸藏关系时，加速能高度特别地被支持；因为不可见的点将在在更好的层次的点的一个高百分比，仔细看了。

简介：Inthispaper,twoapproachesareusedtosolvethePerspectiveThree-PointProblem(P3P):thesymboliccomputationapproachandthegeometricapproach.Inthesymboliccomputationapproach,weuseWu-Ritt'szerodecompositionalgorithmtogiveacompletetriangulardecompositionfortheP3Pequationsystem.ThisdecompositionprovidesthefirstcompleteanalyticalsolutiontotheP3Pproblem.Inthegeometricapproach,wegivesomepuregeometriccriteriaforthenumberofrealphysicalsolutions.Thecompletesolutionclassificationfortwospecialcaseswiththreeandfourparametersisalsogiven.

简介：近日，CheckPoint公司一款为小型企业设计的Safe@Office(tm)安全专用设备最新上市!

简介：AnewmethodforrecognizingChinesecharactersisproposed.Itisbasedontheso-calledfeaturepointsofChinesecharacters.Thefeaturepointsweuseincludethoseonthestrokeofacharacter.i.e.,endpoints.turningpoints,forkpointsandcrosspoints.andthekeypointsonthebackgroundofcharacter.ThismethoddiffersfromthepreviousonesforitcombinesthefeaturepointsonstrokewiththoseonbackgroundanditusesfeaturepointstorecognizeChinesecharactersdirectly.AChinesecharacterrecognitionsystembasedtotop-downdynamicalmatchingoffeaturepointisdeveloped.Thesystemcanrecognizenotonly6763printedsampleSongfontChinesecharactersofsize5.6×5.6mm^2withhighrecognitionrate,butalsothegeneralprintedbooks,magazinesanddocumentswithasatisfactoryrecognitionrateandspeed.

简介：我们在场统一的一个多水平分区为能被设计或在一种含蓄的形式代表的表面重建的代数学的集合表面(MPU-APSS)。代数学的点集合表面(APSS)用本地移动从一套未组织起来的点定义光滑的表面最少平方(MLS)代数学的范围适合。由于本地性质，然而，APSS不为几何学编辑并且当模特儿工作很好。相反，我们的方法基于统一途径的分区为散布的点集合造一个含蓄的近似函数。由使用octree分策略，我们适应地首先为点集合构造本地代数学的范围，然后使用weighting功能一起混合这些本地形状功能。最后，我们从表面计算签署的距离功能的控制错误的近似。另外，我们在场为点使我们的表示合适的一个有效设计操作员设定过滤并且动态点采样。我们为表面重建并且几何学当模特儿例如表面结束表明我们的统一途径的有效性。

简介：Inthispaper,ageometry-basedpointcloudreductionmethodisproposed,andareal-timemobileaugmentedrealitysystemisexploredforapplicationsinurbanenvironments.Weformulateanewobjectivefunctionwhichcombinesthepointreconstructionerrorsandconstraintsonspatialpointdistribution.Basedonthisformulation,amixedintegerprogrammingschemeisutilizedtosolvethepointsreductionproblem.Themobileaugmentedrealitysystemexploredinthispaperiscomposedoftheofttineandonlinestages.Attheofflinestage,webuildupthelocalizationdatabaseusingstructurefrommotionandcompressthepointcloudbytheproposedpointcloudreductionmethod.Whileattheonlinestage,wecomputethecameraposeinrealtimebycombininganimage-basedlocalizationalgorithmandacontinuousposetrackingalgorithm.Experimentalresultsonbenchmarkandrealdatashowthatcomparedwiththeexistingmethods,thisgeometry-basedpointcloudreductionmethodselectsapointcloudsubsetwhichhelpstheimage-basedlocalizationmethodtoachievehighersuccessrate.Also,theexperimentsconductedonamobileplatformshowthatthereducedpointcloudnotonlyreducesthetimeconsumingforinitializationandre-initialization,butalsomakesthememoryfootprintsmall,resultingascalableandreal-timemobileaugmentedrealitysystem.

简介：<正>故事简要美国总统在西班牙首都马德里演讲时遭遇恐怖袭击,总统在混乱中受到枪击,接着现场发生爆炸,上百人伤亡。这名总统原来是一个假货,特工提前获晓现场不安全,紧急换了替身,