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ID:36555815
大小:5.34 MB
页数:116页
时间:2019-05-12
《基于图象的绘制关键技术研究》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、西北工业大学博士学位论文基于图象的绘制关键技术研究姓名:张汗灵申请学位级别:博士专业:信号与信息处理指导教师:郝重阳20031001,。..。,。。。;;;;;;;;;;;;;;;;;;;;;;;;;;。。。...。。;;』92l!:{:;;;,。;。。;;;;;。。....。..。。。。,。。;;;;;;;;;;;;;;。。AbstractImageBasedRendering(IBR)techniqueshaverecentlyreceivedmuchattentionintheVirtualReality(VR)andGrap
2、hicscommunitybecauseoftheirpotentialtocreateveryrealisticimageonpopularhardwareplatform.Thedissertationaddressesthefollowingseveralkeytechniques:theimagemosaic,theimagemorphing,thesimulationbasedonimage,hybridrenderbasedongeometryandimage.1.Ontheresearchoftheautomatici
3、magemosaic,wepresentanewautomatedpanoramicmosaicalgorithmbasedonfeature.ThealgorithmsolvetheproblemhowtodecidetheCOC豫cientsoftheinitial.theweightedfunctionandthewidthofthetransitionzone.Thealgorithmcanbefinishedwithautomatinginmostcaseandsuitsforanyscaleimagewithunknow
4、nanyparameterofcamera.Mosaicimageissmoothandhasnogap.2.AnewimagemorphingalgorithmbasedonBezierfeaturecurveispresented,whichspecifiesmorphingfeatureusingBezierfeaturecurve.Comparedwithfield—basedimagemorphing,wecanspecifythefeaturemoreexactlyandthenumbersoffeatureprimit
5、ivearereduced.Fromexperimentalresults,thealgorithm’Sspeedistrebleimprovedgeneratingasmoothmorphingimage,comparingwithfield—basedimagemorphing.3.Aautomaticimagemorphingalgorithmbasedonwaveletedgedetectionispresented.Thealgorithmcallautomaticallyspecifymorphingfeature.Th
6、emethodmodifiesfield-basedimagemorphing,reducesthecomplexdegreeofmorphingalgorithmandacceleratesmorphing.Fromtheexperimentresults,thealgorithmcanautomaticallymetamorphoseimageandavoidthemosttediouspartofimagemorphing.4.Aautomaticimagemorphingalgorithmbasedonmodifyingac
7、tivecontourmodelispresent,whichautomaticallyspecifiesthefeaturepointwithmodifyingactivecontourmodel.Fromtheexperimentresultsshowthatthealgorithmreducestheburdenoffeaturespecificationandmetamorphosesautomatically.5.We、presentanewalgorithmoffacialexpressionanimationbased
8、onradialbasisfunctionnetworks.Thealgorithmusesradialbasisfunctionnetworkstoconstructthewarpfurtctionusingonlyasmallnu
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