主动式近距离太赫兹人体安检技术分析
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摘要
主动式近距离太赫兹成像技术在人体安检领域已经有了广泛的应用,目前主要有平面扫描、圆柱扫描、扇束扫描三种成像模式。对此三种成像模式的成像原理进行了介绍,对比了不同成像模式的优缺点,同时分析了影响成像质量的因素,从分辨率、信噪比和伪影去除三个方面探讨了提高图像质量的方法,为研发新型主动式近距离太赫兹人体安检设备提供了参考。
In recent years,active near-field terahertz imaging has been intensively investigated for personnel surveillance. There are mainly three imaging modes,planar scanning,cylinder scanning and fan-beam scanning. In this paper,the imaging principles of the three modes are introduced and advantages and disadvantages of each mode are also discussed. Moreover,we give an overview of the factors that affecting the image quality. The approaches to achieving better images are analyzed from the aspects of resolution,signal to noise ratio and artifacts removal.
In recent years,active near-field terahertz imaging has been intensively investigated for personnel surveillance. There are mainly three imaging modes,planar scanning,cylinder scanning and fan-beam scanning. In this paper,the imaging principles of the three modes are introduced and advantages and disadvantages of each mode are also discussed. Moreover,we give an overview of the factors that affecting the image quality. The approaches to achieving better images are analyzed from the aspects of resolution,signal to noise ratio and artifacts removal.
引文
〔1〕郑新,刘超.太赫兹技术的发展及在雷达和通讯系统中的应用(Ⅰ)[J].微波学报,2011,26(6):1-6Zheng Xin,Liu Chao.Recent development of THz technology and its application in radar and communication system[J].Journal of Microwaves,2011,26(6):1-6
〔2〕Sheen D M,Mcmakin D L,Hall T E.Three-dimensional millimeter-wave imaging for concealed weapon detection[J].Microwave Theory and Techniques,IEEE Transactions on,2001,49(9):1581-1592
〔3〕Sheen D M,Mcmakin D L,Hall T E.Cylindrical millimeter-wave imaging technique and applications[A].Proceedings of the Defense and Security Symposium[C],Bellingham,WA:SPIE,2006:62110A-1-10
〔4〕Sheen D,Mcmakin D,Hall T.Near-field three-dimensional radar imaging techniques and applications[J].Applied Optics,2010,49(19):E83-E93
〔5〕Sheen D M,Fernandes J L,Tedeschi J R,et al.Widebandwidth,wide-beamwidth,high-resolution,millimeterwave imaging for concealed weapon detection[A].Proceedings of the SPIE Defense,Security,and Sensing.Bellingham[C],WA:SPIE,2013:871509-1-11
〔6〕Gu S,Li C,Gao X,et al.Terahertz aperture synthesized imaging with fan-beam scanning for personnel screening[J].Microwave Theory and Techniques,IEEE Transactions on,2012,60(12):3877-3885
〔7〕Collins H D,Mcmakin D L,Hall T E,et al.Real-time holographic surveillance system[P].U.S.Patent 5 455590.1995
〔8〕Sheen D M,Mcmakin D L,Hall T E.Combined illumination cylindrical millimeter-wave imaging technique for concealed weapon detection[A].Proceedings of the Aero Sense[C],Bellingham,WA:SPIE,2000:52-60
〔9〕Demirci S,Cetinkaya H,Yigit E,et al.A study on millimeter-wave imaging of concealed objects:application using back-projection algorithm[J].Progress In Electromagnetics Research,2012,128:457-477
〔10〕Sheen D M,Mcmakin D L,Lechelt W M,et al.Circularly polarized millimeter-wave imaging for personnel screening[A].Proceedings of the Defense and Security[C],Bellingham,WA:SPIE,2005:117-126
〔2〕Sheen D M,Mcmakin D L,Hall T E.Three-dimensional millimeter-wave imaging for concealed weapon detection[J].Microwave Theory and Techniques,IEEE Transactions on,2001,49(9):1581-1592
〔3〕Sheen D M,Mcmakin D L,Hall T E.Cylindrical millimeter-wave imaging technique and applications[A].Proceedings of the Defense and Security Symposium[C],Bellingham,WA:SPIE,2006:62110A-1-10
〔4〕Sheen D,Mcmakin D,Hall T.Near-field three-dimensional radar imaging techniques and applications[J].Applied Optics,2010,49(19):E83-E93
〔5〕Sheen D M,Fernandes J L,Tedeschi J R,et al.Widebandwidth,wide-beamwidth,high-resolution,millimeterwave imaging for concealed weapon detection[A].Proceedings of the SPIE Defense,Security,and Sensing.Bellingham[C],WA:SPIE,2013:871509-1-11
〔6〕Gu S,Li C,Gao X,et al.Terahertz aperture synthesized imaging with fan-beam scanning for personnel screening[J].Microwave Theory and Techniques,IEEE Transactions on,2012,60(12):3877-3885
〔7〕Collins H D,Mcmakin D L,Hall T E,et al.Real-time holographic surveillance system[P].U.S.Patent 5 455590.1995
〔8〕Sheen D M,Mcmakin D L,Hall T E.Combined illumination cylindrical millimeter-wave imaging technique for concealed weapon detection[A].Proceedings of the Aero Sense[C],Bellingham,WA:SPIE,2000:52-60
〔9〕Demirci S,Cetinkaya H,Yigit E,et al.A study on millimeter-wave imaging of concealed objects:application using back-projection algorithm[J].Progress In Electromagnetics Research,2012,128:457-477
〔10〕Sheen D M,Mcmakin D L,Lechelt W M,et al.Circularly polarized millimeter-wave imaging for personnel screening[A].Proceedings of the Defense and Security[C],Bellingham,WA:SPIE,2005:117-126