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1、西北工業(yè)大學(xué)博士學(xué)位論文基于圖象的繪制關(guān)鍵技術(shù)研究姓名：張汗靈申請學(xué)位級別：博士專業(yè)：信號與信息處理指導(dǎo)教師：郝重陽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
