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21 个结果
  • 简介:Amethodforshadowdetectionandcompensationforcoloraerialimagesispresented.Itisconsideredthattheintensityvalueofeachimagepixelistheproductofilluminationfunctionandgroundobjectreflection,andtheshadowedregionsontheimagearemainlycausedbytheshortofillumination,sotheinformationcompensationfortheshadowedregionsshouldconcentrateontheilluminationadjustmentofconcernedareaonthebasisoftheanalysisofwholeimage.Theshadowdetectionandcompensationprocedureproposedbythispaperconsistsoffoursteps.

  • 标签: 彩色航空摄影 数学形态学 摄影测量 图像补偿 地图投影
  • 简介:低矮、修长及沉厚.正好用来形容新一代的2004年版本田Shadow750。自1997年面世以来一直配用一台水冷V型双缸发动机,在可靠性方面毋庸置疑.这也是本田十分倚重的一台动力装置.它的优势在于动力充沛及输出均匀。在新款Shadow750上本田不单将造型更新.更把发动机的性能进一步改良。

  • 标签: 本田Shadow 750摩托车 车型设计 动力性能 车辆配置 操控性能
  • 简介:Jiaxing:SteppingOutFromShanghai'sShadowBystaffreporterLuHUISUZHOUANDHangzhouhavelongbeendescribedbytheChineseasaparadiseforda...

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  • 简介:Heightextractionforbuildingsisafundamentalstepof3Dscenereconstructioninmanyvirtualrealityapplications.Inthispaper,weproposeanautomaticmethodtoextracttheheightofbuildingsinhighresolutionsatelliteimagerybasedonthelengthofshadow.Takingintoaccountthelimitationoftraditionalalgorithms,wemakeuseoftheboundaryinformationofabuildingtofacilitatedetectingandmatchingtheshadowregionswithhigheraccuracy.Then,weintroduceashadow-castmodeltocorrecttheshadowlocationinoursystem.Theexperimentalresultshowsthatwhenextractingtheheightofbuildingsfromcomplexurbanregions,ourmethodhasbetteraccuracy.

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  • 简介:Amacro-cellwasusedtostudythephenomenonofanodestriationona34VGAShadowMaskPlasmaDisplayPanel(SMPDP).Thebreakdownprocessinthesustainingperiodofthemacro-cellwastakenbyanIntensifiedChargeCoupledDevice(ICCD)withnarrowbandfilters.ThemechanismofformationandevolutionoftheanodestriationonSMPDPwereinvestigated.Theinfluenceofthewidthoftheelectrode,thesustainingvoltage,sustainingfrequencyandthevoltageoftheshadowmaskontheanodestriationwasalsostudied.Theresultsshowedthatthewidthoftheelectrodes,thesustainingvoltageandfrequencyhadastronginfluenceontheanodestriation.Thevoltageoftheshadowmask,however,hardlyaffectedtheanodestriation,thefiringvoltageorthesustainingvoltage.

  • 标签: 阳极条纹状 性状放电 等离子体掩码阴影显示器面板 强化充电立偶器件
  • 简介:Videoobjectsegmentationisimportantforvideosurveillance,objecttracking,videoobjectrecognitionandvideoediting.Anadaptivevideosegmentationalgorithmbasedonhiddenconditionalrandomfields(HCRFs)isproposed,whichmodelsspatio-temporalconstraintsofvideosequence.Inordertoimprovethesegmentationquality,theweightsofspatio-temporalcon-straintsareadaptivelyupdatedbyon-linelearningforHCRFs.Shadowsarethefactorsaffectingsegmentationquality.Toseparateforegroundobjectsfromtheshadowstheycast,lineartransformforGaussiandistributionofthebackgroundisadoptedtomodeltheshadow.Theexperimentalresultsdemonstratedthattheerrorratioofouralgorithmisreducedby23%and19%respectively,comparedwiththeGaussianmixturemodel(GMM)andspatio-temporalMarkovrandomfields(MRFs).

  • 标签: 自适应前景分割 视频分割 阴影消除 隐藏有条件随机场
  • 简介:Theshadowofacirclecastingonaunparallelplaneisanellipse,theshadowalgorithminvolvesaperspectiveaffinetransformation.Undercommonlyusedlight,thetransformationmatrixforparallelcirclesofdifferentdiameterscastingshadowsontothesameplaneisidentical.UsingAutoCADtogettheshadowofageneralobjectofrevolution,itonlyneedstotakeaseriesofcirclesalongtheaxisofsymmetryandgettheircorrespondingshadowsofellipses,drawinganenvelopetocoverallthesesilhouettesresultsintherequiredoverallshadow.Thenthediscretepointsofshadowcontourlineareprojectedbackontotheoriginalobjectsurface,shadowontheobjectisobtainedaltogether.

  • 标签: engineering GRAPHICS SHADOW algorithm CURVE OBJECT
  • 简介:中国从严肃的水问题正在经历。在在堤的构造的中国的九主要的河盆之中有许多差别,水库,制约,洪水分泌物工程,洪水转向工程,浇生态的建设,水管理管理,等等。为九条主要的河的水资源的阴影价格能提供建议给中国政府。这篇文章开发价格基于优化模型的amultiperiod输入产量接近的一个动态阴影。不同于以前的途径,新模型基于动态可计算出来的一般平衡(DCGE)解决水资源的边缘的long-termprices的问题的模型。首先,DCGE的定义和算法被详细描述。第二,为在在用国家的水管理input-holding-output的中国的1949-2050的九条主要的河的水资源的阴影价格的结果搁置因为在1999的九条主要的河被列出。这篇文章的Aconclusion是为九条主要的河的水资源的阴影价格大部分基于缺乏的程度。水资源的售价应该经由代表阴影价格的参数的用法被修订。

  • 标签: 可计算一般均衡 动力学 输入-输出分析 假定价格 水资源
  • 简介:摘要:本文对linux系统shadow文件SHA512模式下密码的生成方式进行了详细的讨论,同时对密码学安全进行了简要介绍。

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  • 简介:前言:本文讲述了“TrapezoidalShadowMaps”技术在实现大范围的实时动态阴影中的应用和一些使用细节,这需要读者对“ShadowMap”技术有较透彻的理解并对3D数学有一些基本了解。

  • 标签: MAPS 实时动态 大范围 阴影 技术