一种快速准确的人眼定位方法

33,,(,200030):,,,,,,ORLSJTU2IPPR,,90%:;;;:TP391:A:100520086(2005)0420479205AFastandPreciseMethodofEyesLocationYUWei2wei3,TENGXiao2long,LIUChong2qing(InstituteofImageProcessing&PatternRecognition,ShanghaiJiaotongUniversity,Shanghai200030,China)Abstract:Fastradialsymmetrytransformcanfastdetectpointsofinterestandistheim2provementofgeneralizedsymmetrytransform.Firsly,thelocationofeyebrowsisesti2mated.Accordingtothelocationofeyebrows,incertainrangethatpossiblyincludeseyes,fastradialsymmetrytransformisusedtodetectblackpointsofinterest.Afterrectifyingadeviationandaccordingtothegeometricalfeatures,theeyescandidatesareselectedandthepreciselocationcanbedecidedbypupilmodel.TheexperimentsinORLandSJTU2IP2PRfactdatabaseshowthealgorithmiseffectiveandcanbeusedinreal2timesystem.Keywords:eyelocation;eyebrowlocation;fastradialsymmetrytransform;pupilmodel1,,,[1,2],,[3],,D.Reisfeld[4,5](generalizedsymmetrytransform),2002GarethLoy[6],,,,2(),,(),1[6],20%,,,5%16420054JournalofOptoelectronicsLaserVol.16No.4Apr.20053:2004205212:20042092233E2mail:[e-mail]©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,n;n1,p,g(p),n=2,p+ve,p-ve,p+vep-ve[6]p+ve(p)=p+roundg(p)g(p)n(1)p-ve(p)=p-roundg(p)g(p)n(2),round(),p-ve(p)1Fig.1ThepositionofpositiveandnegativepixelsnN,2(orientationprojectionimage)On(magnitudeprojectionimage)MnOnMnp-ve(p)1g(p),On[p-ve(p)]=On[p-ve(p)]-1(3)Mn[p-ve(p)]=Mn[p-ve(p)]-g(p)(4)n,FnAn,nSnSn=Fn3An(5)Fn(p)=ŽOn(p)()˜Mn(p)(6)ŽOn(p)=Onmaxp{On(p)}(7)˜Mn(p)=Mnmaxp{Mn(p)}(8),An,pp-ve(p);,p-ve(p),p,22Fig.2ResultofGaussianfilter,1),;2),n=0.5n,;,,=2,(symmetrymap)SS=6nNSn(9)92112,N=135,SS=1.0,S(18,),3,,,3,084200516©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3(a);(b)Fig.3(a)Originalimages;(b)Resultsofradialsymmetrytranslation,:1)Sobel-1-2-1000121,img2sobel2)img2sobel,T,img2sobelTimg2sobel10%3)Timag2sobel,,majorityimg2bw4)img2bwwh,x,y,h/8yh/2w/8x7/8w1.5,20%5)2xw/2,xw/2-5,;xw/2,xw/2+5,2,,;,6)2y,7),xw0.3,yh0.15,;,x-w/2w0.2,3,w0.3,h0.2,xw/2-10,xw/2+10,;,8)2yeyebrow2y,;,4eyebrow2y,y[eyebrow2y,eye2brow2y+30];,y[H/6,H/2],H,S,S8,,,44,4,+44,4Fig.4Rectifyingthedeviationbypupilmodel,2:1),,MN(2121)ALAR,AR180BR,ALBR()[7]r=6M-1m=06N-1n=0[AL(m,n)-AL][BR(m,n)-BR]6M-1m=06N-1n=0[AL(m,n)-AL]26M-1m=06N-1n=0[BR(m,n)-BR]2(10)1844:©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2),77,,,5,ORL400;SJTU2IPPR45,10,450,,,P,VC6.0,15frame/sSJTU2IPPR2,112Tab.1CompareoftwomethodsFirstapproach/(%)Secondapproach/(%)Detectionrate81.1093.33Omissionrate4.003.56Falserate14.893.11,22,,,1,ORLORLSJTU2IPPR,ORL,,92%;SJTU2IPPR,,,,1s15frame223Tab.2CompareofthreeexperimentsORL/(%)SJTU2IPPR/(%)Video/(%)Detectionrate89.5093.3391.1Omissionrate4.253.563.7Falserate6.253.115.25(a)3ORL,3SJTU2IPPR;(b),,5;(c),(d),[phone]©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5Fig.5Resultsofexperiments6,,;,,;,ORLSJTU2IP2PR,90%,:[1]GUHua,SUGuang2da,DUCheng.Automaticlocalizationofvitalfeaturepointsonhumanfaces[J].JournalofOp2toelectronicsLaser(),2004,15(8):9752979.(inChinese)[2]DINGRong,DAIQiong2hai,XUWen2li,etal.Classifiede2lasticmatchingfacerecognitionalgorithmusedinlargedatabase[J].JournalofOptoelectronicsLaser(),2004,15(10):123821241.(inChinese)[3]ZHANGBai2xing,SUGuang2da.Studiesonhumanfaceim2agingpropertiesandthegoalsoffacenormalization[J].JournalofOptoelectronicsLaser(),2003,14(4):4062410.(inChinese)[4]ReisfeldD,WolfsonH,YeshurunY.Contextfreeattention2aloperators:thegeneralizedsymmetrytransform[J].In2ternationalJournalofComputerVision,SpecialIssueonQualitativeVision,1995,14:1192130.[5]ReisfeldD,YeshurunY.Preprocessingoffaceimages:Detectionoffeaturesandposenormalisation[J].Com2puterVisionandImageUnderstanding,1998,71(3):4132430.[6]GarethLoy,AlexanderZelinsky.Afastradialsymmetrytransformfordetectingpointsofinterest[A].ECCV[C].2002:3582368.[7]LIANGLu2hong,AIHai2zhou.Facedetectionbasedonthematchingofmuleiplerelatedtemplates[J].JournelofSoftware(),2001,12(1):922102.(inChinese):(1978-),,,,,13844:©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.