基于DIRECTSHOW技术的虚拟演播室系统的研究与实现

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1、国内图书分类号：TP391西南交通大学研究生学位论文基于DirectShow技术的虚拟演播室系统的研究与实现笠姓级二oo四级二oo七年五月西南交通大学硕士研究生学位论文第1

2、页AbstractInrecentyears，thevirtualstudiosystemhasbecomeoneoftechnologyinTVprogrammakingfield．Inthissystem，thethree-dimensionalscenewhichisproducedbycomputerandthevideoscenewhichisproducedbycameraarecomp

3、osedsynchronized．Asresultofsynchronouschange，thevirtualstudiosystemmakesresultmoreperfect．Withthedevelopmentofvirtualstudiosystem，moreandmorepeoplepayattentiontoit．Atthepresenttime，theproductsofthevirtualstudiosystemaremostbasedonthegraphicworkstation，whicharetooexpensivetobeusedwidelyfo

4、rnormalusersinChina，SOtheresearchandrealizationofvirtualstudiosystemwithlowcostwillchangethissituation．Tobreakthelimitation，thisthesisistodevelopavirtualstudiosystembasedonDirectXandPC，whichcanmakeitpossibletoapplyvirtualstudiotechnologywidely．Thepurposeofthisthesisistocarryoutthevirtual

5、studiosystem．Firstly,muchkeytechnology,suchastheorientatingandadjustingofcamera，theplotofvirtualscenes，thecuttingandfillingvideo，arequoted．TheschemeofvirtualstudiosystembasedonDirectXandPCiscomeupundercomparingadvantagesanddisadvantagesofpresentvirtualstudiosystem．Secondly，thispaperalsoi

6、ntroducesthemattingtechnologyandthenchoosesamattingalgorithmbasedonAlphathroughcomparingothers．Later，fasterAlphaestimationarithmeticisusedinprogram．Thirdly,theDirectShowtechnologyisanalyzed，especiallyinthedesignoffilter．Last，thesearchandrealizationofvirtualstudiosystembasedonDirectXandPC

7、isintroduced．Onthebasisofanalyzinganddesigningabove，theUIofvirtualstudiosystemisrealizedwithMFC，includingtheconfigurationofsystem，themanagementofthree—dimensionalscene，themanagementofcapturedevice，themanagementoflocalvideosceneandthecompositionofthereal-virtualvideo．Videocompositionofvir

8、tualstudiosystemisachievedonDirectShow，includinggatheringvideo，thesourcefilterofvirtualvideo，cuttingandfillingvideo，titlefilter,etc．Finallythisprojectiscompleted西南交通大学硕士研究生学位论文第

9、Il页throughimplementingthreepartswhichisconsistofvideocompositionbasedonDirectShow,three-dimens