·电气与自动化·何紫阳,等·基于双变焦摄像头的空中目标跟拍系统第一作者简介:何紫阳(1995—),男,江西上饶人,硕士研究生,研究方向为嵌入式系统开发。DOI:10.19344/j.cnki.issn1671-5276.2023.01.053基于双变焦摄像头的空中目标跟拍系统何紫阳,赵敏,周宇阳(南京航空航天大学自动化学院,江苏南京210016)摘要:针对空中目标的跟拍画面不清晰、不稳定的问题,设计了一种基于双变焦摄像头的空中目标跟拍系统,采用高精确云台、双变焦摄像头及高性能计算机,能够根据目标距离动态调整双变焦摄像头的焦距,在跟踪目标并拍摄清晰、稳定的运动图像。该系统采用了基于深度学习的目标检测算法,通过加权质心算法计算目标质心位置;采用卡尔曼滤波与轨迹拟合相结合的位置预测算法,利用三面交汇原理计算目标的空间位置。实验结果表明:该系统能够获取目标稳定清晰的图像并计算目标的空间位置,验证了系统的可靠性和实用性。关键词:目标检测;目标跟拍;目标空间定位;双变焦摄像头中图分类号:TP275文献标志码:B文章编号:1671-5276(2023)01-0219-03AirTargetTrackingSystemBasedonTwoZoomCamerasHEZiyang,ZHAOMin,ZHOUYuyang(CollegeofAutomation,NanjingUniversityofAerospaceScienceandAstronautics,Nanjing210016,China)Abstract:Aimedattheproblemofindistinctandunstabletrackingpictureofairtarget,anairtargettrackingsystembasedontwozoomcamerasisdesigned.Thesystem,equippedwithahigh-precisionpantilt,twozoomcamerasandahigh-performancecomputer,candynamicallyadjustthefocallengthofthedualzoomcamerainlinewiththetargetdistance,andcaptureaclearandstablemovingimageofthetargetwhiletrackingthetarget.Thesystemadoptsthetargetdetectionalgorithmbasedondeeplearningandcalculatesthetargetcentroidpositionthroughtheweightedcentroidalgorithm.ThesystemalsoemploysthepositionpredictionalgorithmcombiningKalmanfilterandtrajectoryfittingtocalculatethespatialpositionofthetargetbythree-sidedintersectionprinciple.Theexperimentalresultsshowthatthesystemcanobtainastableandclearimageofthetargetandaccuratelycalculatethespatialpositionofthetarget,whichverifiesthereliabilityandpracticabilityofthesystem.Keywords:targetdetection;targettracking;targetspacepositioning;twozoomcameras...