干涉条纹的处理方法研究

:1997210223;:1998201212191Vol.19,No.119991ACTAOPTICASINICAJanuary,1999(,210094),,,,,,,,,,,1,,[15],,,,,,,,,,,2,,,,,,,I(r)=ûAû2exp(-2Pr2b2)(1)b,A,,,,,G0(x,y)=12PR2exp(-x2+y22R2)(2)G(x,y)=2PR2exp(x2+y22R2)(3)R,R,1(a),1(b),,Fig.1(a)Originalinterferogram,(b)Anti2Gausstransform3,:I(x,y)=B(x,y)+A(x,y)cos[P(x,y)](4),I(x,y),B(x,y)A(x,y),P(x,y),,(4),,,,,P=X3p(5)p,X,P,:G0(x,y)=12PR2exp(-x2+y22R2)(6)P(x,y)=G0(x,y)3p(x,y)(7)R,,,,,ý2=522x2+522y2(8)6419ý2[G0(x,y)3p(x,y)]=ý2G0(x,y)3p(x,y)(9),ý2G0(x,y)=-1PR4(1-x2+y22R2)exp(-x2+y22R2)(10)R2(a)2(b)2(c)2(d),,2(b),2(c),,,,Fig.2(a)Edgedetection,(b)Automaticvaluedbinary,(c)Automaticvaluedbinaryafteranti2Gausstransform,(d)Fixedvaluebinary4,,(Hilditch),,4333,x33,oix0x(o15)11,x741:Fig.3Model(o5+o3+o2)(o4+o6+o7)+(o2+o1+o4)(o5+o7+o8)=0xab,,,,,1,,,x,:1)£4i=1o2i-1(o2i+o2i+1)=1,(o9=o5);2)BN1,B,N;3)BNT,T;4),x1)2),x,3),x,1),,2)4),3)1111x10001111110000000x0111000000111modela:paddignprocessmodelb:deletingprocessFig.4(a)Modelthinningprocess,(b)Hilditchthinningprocess4(a),4(b)4,,,,,,,,,,8419[1]EnxiYu,SoyoungS.Cha.Two2dimensionalnonlinearregressionforinterferogramanalysis.Proc.SPIE,1995,2546297306[2]JamesS.Slepicka,SoyoungS.Cha.Stabilizednonlinearregressionforinterferogramanalysis.Appl.Opt.,1995,34(8)50395046[3]WonjongJoo,SoyoungS.Cha.Automatedinterferogramanalysisbasedonanintegratedexpertsys2tem.Appl.Opt.,1995,34(11)74867496[4]ThomasM.Kreis.Computeraidedevaluationoffringepatterns.OpticsandLasersinEngineering,1993,(19)221240[5]HuangZhi,RolfB.Johansson.Interpretationandclassificationoffringepatterns.OpticsandLasersinEngineering,1992,(17)925[6]..,1989,9(1)6166[7],,..,1991,11(1)8891[8],,..,1991,5(2)5359[9],..,1993,13(4)340344ResearchontheInterferogramProcessingWuDonglouYeLihuaBianBaominHeAnzhi(AppliedPhysicsDepartment,NanjingUniversityofSciencesandTechnology,Nanjing210094)(Received23October1997;revised12January1998)AbstractAseriesofimageprocessingmethodsoffringeanalysisisgiven.Itin2cludesmeanprocessingofintensitydistributionusingtheanti2Gaussdistribu2tion,edgedetectioninsteadofbinarymethodandaneffectivethinningmethod.Thepracticalmethodshavebeenusedtoprocesstheinterferogramofopticalcomputertomographyandgoodresultsareobtained.Keywordsinterferometry,imageprocessing,Gaussdistribution,edgedetection,thinning.941: