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ID:36381036
大小:3.48 MB
页数:93页
时间:2019-05-10
《虚拟展示系统中关键技术的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、浙江大学博士学位论文虚拟展示系统中关键技术的研究姓名:王鹏申请学位级别:博士专业:计算机科学与技术指导教师:潘志庚;JohnXin20051201实验表明,本文的算法交互简单,模拟效果真实。因为本算法是一种基于图像的方法,所以计算量和存储量都很小,非常适合于网络虚拟展示。在研究上述算法的基础上,本文实现了两个应用系统。一个是PC平台卜的纺织品虚拟展示系统:布艺设计大师,该系统的核心是色彩置换算法和基于区块的纹理映射算法。同时系统也提供了信息管理,数据安全等模块。另一个是移动平台上的个性展示系统:易秀,
2、该系统的核心模块是色彩置换算法。易秀系统目前应用在一款智能手机平台上,实现了拍摄、处理、传播一体化,具有极大的商_k价值。关键词:虚拟展示,色感一致性,二色反射模型,中值偏移,反射分量分解,色彩置换,纹理映射,景深AbstractVirtualexhibitiontechnologyhasbecomeoneofthehotresearchtopicsinrecentyears,alongwiththebloomingofE—Commerce.Therealethreekeyproblemsinvirt
3、ualexhibitionsystem:howtoimprovetheexhibitioneffects,howtoreducethecomputationandstoragerequirementandhowtoprovidemoreconvenience.Someeffortshavebeenperformedontheseissuesinthisdissertation.Themaincontributionsofthisdissertationinclude:Anewcolorconstanc
4、yalgorithmfortmcalibratedimages:Theinflectionoftheincidentlighthastoberemovedduringthecourseofvirtualexhibition.TraditionalcolorconstancyalgorithmsCanonlyhandletheimageswhichintensitiesarelinearwiththescenereflectedilluminations.Thereforetheyarenotpract
5、ical.hlthisdissertation,weprovideanewcolorconstancyalgorithmwhichCanhandleuncalibratedimagesandisfleeofcameraandshotparameters.AnisotropicMeanShiftanalysisisemployedtoclustercolorsignalsformoneuniformlycoloredsurface.Theclusteringresultgivesthevariation
6、trendofchromaticity.Theestimationofthechromaticityoftheincidentlightiscalculatedonthechromaticityplane.Arobustframeworkisdesignedtodealwiththeimageshaveafewuniformlycoloredsurfaces.ExperimentsshowthatouralgorithmCangetagoodestimationandbeindependentonca
7、meraandshotparameters.Anewcolorsubstitutionalgorithmbasedonreflectingcomponentdecomposition:acolorsubstitutionalgorithmisneededwhenthematerialsofproductsarechangedinavirtualexhibitionsystem.Traditionalcolorsubstitutionalgorithmsjustkeepthebrightnessdist
8、ributionontheobjectareaunchanged.Thereforethesubstitutedresultisnotrealistic.Thealgorithmgiveninthisdissertationutilizesthephysicsreflectencemodel.ThereforeitCanprovidemorerealisticeffects,Firstweuseanovelprojectionmethodtodecomp
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