光电子激光

****,,,,(,310027):(DIS),(TSS)(PA)DIS,TSS(FS-BM)。,,。:(PA);(TSS);(DIS);:TN911.73:A:1005-0086(2006)06-0746-04AFastDigitalbmageStabili^ationAlgorithmBasedonMultiple-candidateThree-stepSearchCHENYue-ting**,FENGHua-jun,XUZhi-hai,LIQi,WANGXiao-yong(StateKeyLab.ofModernOpticalInstrumentation,ZhejiangUniversity,Hangzhou310027,China)Abstract:AnewfastdigitaIimagestabiIization(DIS)schemeispresentedbasedonthree-stepsearch(TSS)aIgorithmandprojectionaIgorithm(PA).MuItipIe-candidatesareusedinsearchstepsofTSSaIgorithm,whichimprovesthemotionestimationaccuracy.Thesim-uIationexperimentsshowthattheproposedschemeisahigh-speedandhigh-precisionaI-gorithmforimagestabiIizationandcanbeusedformorecompIicatedmotionestimationmodeIs.Keywords:projectionaIgorithm(PA);three-stepsearch(TSS);digitaIimagestabiIization(DIS);muItipIe-candidate1(DIS),,、,。DIS、,、、。DIS,、(PA)[1][2]。,。[3](TSS)、,,,。TSS、,,,(FS-BM),FS-BM。,,。17620066JournalofOptoelectronics·LaserVol.17No.6Jun.2006*:2005-09-09:2005-07-30*:(LMOI-0401);(20051007);(20043009)**E-mail:[e-mail]2、PA[4],Fourier,,。PAFS-BM,、,。M×N,(M+2S)×(N+2S),[-S,+S]。、Ht(N)=ΣN-1n=0ft(N,n)(1)Vt(n)=ΣM-1N=0ft(N,n)(2),Ht(N)tN,N=1,2,…,M,;Vt(n)tn,n=1,2,…,N,;ft(N,n)t(N,n)。1,(a);(b);(c)、(d)、;(e)、(f)、;、,(g)、(h),。(SAD),D(i,])=ΣMN=1WHt(N)-Href,i,](N)W+ΣNn=1WVt(n)-Vref,i,](n)W(3)、,。SAD1、Fig.1Row,columngrayscaleprojectionandcorrelationvalue,。3(PTSS)PA,PTSS,;TSS,PA[4]。2PTSS1)sp1,4(sp1-sp9),PA(3),2。2),1)2PTSS(sp1esp9)Fig.2Searchpoint(sp1esp9)inPTSS,2,3。3),1)·747·6:,1,,,。PTSS,[-7,+7](4+2+1=7)。,[-(2N-1),+(2N-1)],2N-1-1,,。PTSS,,1,,。4PTSS(MPTSS)PTSS,MPTSS,,,。,、2,,11,22,34,4,。5PCFS-BM、TSS、MTSS、PTSSMPTSS,。FS-BM16×16,64×64;TSS[-7,+7],。RMSP=1NΣNn=1(xn-‘xn)2+(yn-‘yn)ヘ2(4),RMSP,,。PCVC6.0,ms。(3)320×240,1,[-7,+7]32×32,[-15,+15]48×48。1[-7,+7],301;21,,51;3Fig.3Testsequences31,[-15,+15];4,71,[-7,+7]。1,TSSPTSS,,1Tab.1SimulationresultsontestdsequencesSequencenumberRMSPTSSMTSSPTSSMPTSS10.14380.09040.06710.000020.35610.29460.28280.000030.16660.06050.11870.042440.10100.05710.10100.0571,FS-BM。_MPTSS,,。PA,,FS-BM,,、,。,TSSFS-BM1/4,3ms;1ms,。,、[5],。·847·200617:[1]KrishnaRatakonda.ReaI-timedigitaIvideostabiIizationformuIti-mediaappIications[J].2999,1998,4:69-72.[2]ZHONGPing,YUQian-yang,JINGuang.MotionestimationandmotioncompensationbasedonmatchingtechnoIogyoffeaturepoint[J].)*+,(#$*-./*!$!&,*(’&0·1#0!,(·),2004,15(1):73-77.(inChinese)[3]TANGZe-peng,QINLei,SONGXiu-chang,!#$.AnaIy-zingofmotionestimationaIgorithm[J].K’F’#$:P#(3K’F’#$P’3!*(),2001,(12):10-13.(inChinese)[4]KimJoon-Seek,ParkRae-Hong.Afastfeature-basedbIockmatchingaIgorithmusingintegraIprojection[J].2999%!$!&!3A,!#0’(?*66+(’&#’*(0,1992,10(5):968-971.[5]ZHONGPing,YUQian-yang,WANGMing-jia,!#$.Meth-odforimprovingaccuracyofprojectionaIgorithmfortheeIectronicimagestabiIization[J].)*+,(#$*-./*!$!&5,*(’&0·1#0!,(·),2003,14(2):182-186.(inChinese):(1981-),,,,、、.,,。“,,,”,、()、,、,。,2006“·”。。。:://sunshine.hust.edu.cn/sunshine/zt/pd/index.asp。·、;;、;;;。·::[e-mail];:027-87541047·;;;;;;。·::[e-mail];:027-87541782:1.---20067312.---20068313.---20069304.:20061125.:2006113-5·947·6: