Gabor滤波器的指纹图像分割方法

Gabor:2010-05-04;:2010-08-04:1983-2007。450001:。GaborGabor。Gabor。:Gabor:TP391.41:A:1008-8725201011-0179-03GaborFiltersforFingerprintImageSegmentationSONGLi-jiang,LUOYongCollegeofElectricalEngineering,ZhengzhouUniversity,Zhengzhou450001,ChinaAbstract:Inordertoimprovethematchingrateoffingerprintidentificationsystem,weneedavalidfingerprintimagesegmentation.ThispaperanalyzestheprincipleoftheGaborfilter'imaginarypart,thenusetheresultsofGaborfilterasthecharacteristicvaluetosegmentfingerprintimage.Onthisbasis,weproposeafingerprintimageclassificationSegmentationAlgorithm-combinationofGaborfeaturescharacteristicvalueandgrayvalue.Keywords:Gaborfilter;fingorprintimagesegmentation;characteristicvalue0、。GaborGaborGaborGaborGaborGabor。。1Gabor1.1。、。22911201011CoalTechnologyVol.29,No.11November,2010174SMNSMN。PKIPublicKeyInfrastructureSMN1SMNiPNa/PKi/SKi2PKiPNSMNSMN。PK/SKSMN。3、。。[1],.[J].,2007,17(4)9-11.[2],.(TBAC)[J].,2008,24(3)621-624.[3],.-[J].,2007,(2):800-807.[4],,.[J].,2007,25(3)18-23.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!。、、31。2。32①②。2。1.2GaborGaborGabor。Gabor。Gabor。GaborGabor[1]:gx,θθy=12πσxσyexp-x22σ2x-y22σ2yθθexpjwθθx1w。1,GaborGaussw。GaussGaborGaborx,y。Gabor。Euleexpjwθθx=coswθθx+jsinwθθx1Gx,θθy=12πσxσyexp-x22σ2x-y22σ2yθθcoswθθx+j12πσxσyexp-x22σ2x-y22σ2yθθsinwθθx2GaborGabor。Gabor[2]。GaborGabor。、Gabor。。Gabor。1.3GaborGabor。hx,y,θ,σx,σyθθ=exp-12xθk2σ2x+yθk2σ2yθθθθ×expi2πfxθkθθk=1,…,m3xθk=xcosθk+ysinθkyθk=xsinθk+ycosθkfmθkGaborkσxσyxy。fθkθk=πk-θθ1/mk=1,…,mGaborX,θθYGaborgX,Y,θk,σx,σyθθ=∑x=-w/2w/2-1∑y=-w/2w/2-1IX+x,Y+θθyhx,y,θk,σx,σyθθ|k=1,…,m4IX,θθYX,θθYwNw×w。Gabormw×w。mw×wGabormGabor。GaborG=1m-1mk=1Σgθk-gθθθ2θθ125gθ=1mmk=1ΣgθkGabor。。Gabor。TbTbGaborG≤TbGaborG≥Tb。1.4GaborGaborGabor。GaborGGGmean。0.3Gmean。Gmean=∑GG6。G0.3Gmean0.8GmeanG0.8Gmean。1.5GaborGabor、Gabor。Gabor。1GaborGGGmean。Var。29·180·ab1Gaborab2Gaborabc3GaborVk,l=1w×wwi=1Σwj=1ΣGi,j-Mk,lΣΣ2,k=1,…,m,l=1,…,n7Var=1M×NMi=1ΣNi=1ΣGi,j-MeaΣΣn28MMean。2G0.3GmeanV0.4Var。G0.8GmeanM0.9Var。2Pentium42.4GHz512MBFVC2004DB-2。300*30020*20w=20225。1GaborGabor1。2GaborGabor。、。、、2。3GaborGaborGabor3。3Gabor、。Gabor、。。[1].Gabor[J].20083120145-147.[2].Gabor[J].A2004991037-1041.Gabor11·181·ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ