一种同心圆编码靶标的解码与定位方法张峻榕1刘柯健2张震2宋银良3彭涛1张之江1(1上海大学通信与信息工程学院,上海200444;2上海航天电子技术研究所,上海201109;3上海宇航系统工程研究所,上海201108)3DControlPointCoordinatePositioningBasedonConcentricCircleCodedTarget摘要:针对大视场三维视觉测量时,被测目标特征点难以直接提取或不易精准匹配场景的问题,提出一种同心圆编码靶标的解码与定位方法,利用轮廓提取、连接弧段、椭圆匹配等方法确定靶标区域,并基于交比不变原理实现其中心定位,通过枚举标准信号并比较相关性实现解码。在被测目标表面部署该靶标作为特征点后,针对其图样进行定位与解码,即可利用视觉测量系统在大视场、干扰多的环境下进行高精度的三维视觉测量。实验结果表明,该方法可在物距约30m时采集的复杂场景图像中准确定位并解码合作靶标。关键词:同心圆特征;编码靶标;目标识别;三维定位;视觉测量Abstract:Forthescenariothatthefeaturepointsofthetargetundertestaredifficulttobeextracteddirectlyormatchedaccuratelyfocusedonthelargefieldofview3Dvisualmeasurement,adecodingandlocalizationmethodofcon-centriccirclecodedtargetisproposedtodeterminethetargetareathroughcontourextractioninthispaper,arcsegmentsconnectingandellipsematching,andrealizeitscenterlocalizationbasedoncrossratioinvarianceprinciple,decodingbyenumeratingstandardsignalsandcomparingcorrelation.Afterdeployingthetargetasafeaturepointonthesurfaceofthetargetundertest,thelocalizationanddecodingareperformedforitspattern,andthevisionmeasurementsystemcanbeusedtoperformhigh-precision3Dvisionmeasurementintheenvironmentwithlargefieldofviewandmanydisruptions.Theexperimentalresultsshowthatthismethodcanaccuratelylocateanddecodethecooperativetargetunderthecircum-stancesofcomplexsceneimagesacquiredattheobjectdistanceofabout30m.Keywords:concentriccirclefeatures,codingtargets,targetrecognition,3Dpositioning,computervisionmeasurement近年来,计算机视觉三维测量技术因其非接触、大量程、速度快等优点,在航空、航天及重大装备制造等领域得到了广泛运用[1-3]。在三维视觉测量系统的标定、测量过程中,需要借助高精度的“世界三维-图像二维”特征点对来确定光学成像模型中的待定...