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1、西南交通大學(xué)碩士學(xué)位論文針對(duì)人臉區(qū)域的視頻容錯(cuò)編碼技術(shù)研究姓名:王標(biāo)申請學(xué)位級(jí)別:碩士專業(yè):計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師:彭強(qiáng)20090501西南交通大學(xué)碩士研究生學(xué)位論文第Ⅱ頁AbstractOverthepastfewdecades,withthehiglI—speeddevelopmentofInternetandwirelesscommunicationnetworks,di.gitalvideocompressiontechniquewasextensivelyusedinmanyfields.Asakeytechnology,F(xiàn)acedetectionhasani
2、mportantapplicationvaluesinimagesearchingbasedoncontent,videomonitoring,videomeeting,videophone,human-machineinteractionandsoon.Facingwiththeemergenceofvideodata,howtolocatethefaceregionexactly,hasbecomeanurgentproblem.Ontheotherhand,theInternetandwirelessnetworknowadayscannotprovidereli
3、abledatatransmission,andthepacketlossandthebiterrorareliabletoOccuratthemomentofdeliveringvideostreamingoverthesenetworks.Thelowbit—ratevideostreamcompressedbymotioncompensatedhybridcodecsisextremelyvulnerableagainsttransmissionerrors.Howtoimproveerrorresilienceoftherequiredinformationin
4、video,isbecomeoneoftheurgenttechnologiesofthecurrentvideofield.ThepaperfirstintroducesthemaincontentofH.264encodingtechnologywhichiscloselyrelatedtothethesis,thenanalyzestheratedistortionalgorithmmodelandRDOmethodinJMtestmodel.Facedetectiontechnologyinvideoisresearched,Combiningwithmotio
5、nvectorofvideoencoding,interframecorrelation,face·featureandframedifference,weproposeafacedetectionalgorithmbasedonvideosequencewhichcandetectfacefastandexactly.TheproposedalgorithmcandetectthepositionoffaceregioneffectivelyandremedythefaceregionwhichisfalsejudgedandmissedjudgedinAdaBoos
6、talgorithm.Experimentalresultsshowthatthealgorithmimprovesbotllspeedandaccuracyoffacedetection,comparedwithAdaBoostalgorithm.Finally,thepaperresearchesrate—distortionoptimizedmodel.syntheticallyanalyzespropagationdistortionandconcealmentdistortionintheprocessofvideotransmission.Inparticu
7、lar,thevideotransmissiondistortionofend—to-endonpixellevelprecisionisstudied,realizinga-generaltransmissiondistortionestimatedmodel.Combiningthetransmissiondistortionoffaceregion,afaceregionrefreshedalgorithmbasedondistortionisproposedandimplemented.Thealgorithmcanchoosef