一种用于人体安检的三维稀疏太赫兹快速成像算法

刘玮; 李超; 张群英; 方广有

doi:10.12000/JR15116

一种用于人体安检的三维稀疏太赫兹快速成像算法

doi: 10.12000/JR15116

1.
(中国科学院电磁辐射与探测技术重点实验室北京 100190)
2.
(中国科学院大学北京 100039)

基金项目:

中国科学院知识创新工程项目(YYYJ-1123)

国家863计划(2012AA121901),国家自然科学基金(11174280)

详细信息

作者简介:
刘玮(1989-),男,博士生,主要研究方向为太赫兹成像体制和成像算法。E-mail:simba5@163.com;张群英(1972-),女,研究员,博士生导师,主要研究方向为超宽带雷达成像理论与方法、太赫兹成像技术;李超(1976-),男,副研究员,主要研究方向为太赫兹成像技术、微波及太赫兹波段的左手材料设计和计算电磁学等;方广有(1963-),男,研究员,博士生导师,主要研究方向为超宽带雷达成像理论与方法、地下资源电磁勘探技术、超宽带天线理论与技术和太赫兹成像技术等。

通讯作者:
刘玮simba5@163.com

计量
- 文章访问数: 2495
- HTML全文浏览量: 450
- PDF下载量: 2004
- 被引次数: 0
出版历程
- 收稿日期: 2015-11-04
- 修回日期: 2016-01-05
- 网络出版日期: 2016-06-28

Fast Three-dimensional Sparse Holography Imaging Algorithm for Personal Security Verification

1.
(Key Laboratory of Electromagnetic Radiation and Sensing Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
2.
(University of Chinese Academy of Sciences, Beijing 100039, China)

Funds:

The Knowledge Innovation Program of the Chinese Academy of Sciences (YYYJ-1123), The National High Technology Research and Development Program of China (2012AA121901), The National Natural Science Foundation of China (11174280)

摘要

摘要: 太赫兹全息成像技术在人体安检成像、隐匿武器检测、无损检测等领域具有广阔的应用前景。该文提出了一种能够避免产生距离混叠现象的3维稀疏太赫兹快速成像体制和成像算法。该方法通过对太赫兹雷达的3维成像几何及相应回波模型的分析,利用随机稀疏频点数据来有效消除距离混叠现象;同时利用对稀疏回波数据的频谱搬移和插值来获得包含目标完整信息的3维数据,以实现对目标的3维分辨成像。通过对0.2 THz波段的仿真和实验数据的重建,验证了算法的正确性和有效性。
- 太赫兹全息成像 /
- 快速稀疏成像 /
- 人体安检
Abstract: Terahertz holographic imaging has broad applications in the field of personal security verification, concealed weapon detection, and non-destructive testing. To suppress the range ambiguity, a fast sparse image reconstruction approach and imaging scheme is proposed for three-dimensional terahertz holography. The proposed algorithm establishes the terahertz imaging geometry and corresponding echo model. The range ambiguity is eliminated using the random step frequency method, and a frequency shift procedure is applied to recover the targets with a high computational efficiency. Simulation and experimental results verify the proposed algorithm.
- Terahertz holography imaging /
- Fast sparse imaging /
- Personal security verification system

HTML全文

参考文献(10)

[1]	Cooper K B, Dengler R J, et al.. THz imaging radar for standoff personnel screening[J]. IEEE Transactions on Terahertz Science and Technology, 2011, 1(1):169-182.
[2]	赵雨露, 张群英, 李超, 等. 视频合成孔径雷达振动误差分析及补偿方案研究[J]. 雷达学报, 2015, 4(2):230-239. Zhao Yulu, Zhang Qunying, Li Chao, et al.. Vibration error analysis and motion compensation of video synthetic aperture radar[J]. Journal of Radars, 2015, 4(2):230-239.
[3]	Gao X, Li C, et al.. Study of a new millimeter-wave imaging scheme suitable for fast personal screening[J]. IEEE Antennas and Wireless Propagation Letters, 2012, 11: 787-790.
[4]	Gao X, Li C, et al.. Design, analysis and measurement of a millimeter wave antenna suitable for standoff imaging at
[5]	checkpoints[J]. Journal of Infrared, Millimeter and Terahertz Waves, 2011, 32(11):1314-1327. Tropp J A and Gilbert A C. Signal recovery from random measurements via orthogonal matching pursuit[J]. IEEE Transactions on Information Theory, 2007, 53(12): 4655-4666.
[6]	Daubechies I, Defrise M, and De Mol C. An iterative thresholding algorithm for linear inverse problems with a sparsity constraint[J]. Communications on Pure and Applied Mathematics, 2004, 57(11):1413-1457.
[7]	Gu S, Li C, et al.. Three-dimensional image reconstruction of targets under the illumination of Terahertz Gaussian beam-theory and experiment[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(4):2241-2249.
[8]	Axelsson S R J. Analysis of random step frequency radar and comparison with experiments[J]. IEEE Transactions on Geoscience and Remote Sensing, 2007, 45(4):890-904.
[9]	Sun Zhaoyang, Li Chao, et al.. Fast three-dimensional image reconstruction of targets under the illumination of terahertz gaussian beams with enhanced phase-shift migration to improve computation efficiency[J]. IEEE Transactions on Terahertz Science and Technology, 2014, 4(4):479-489.
[10]	Steinberg B D. The peak sidelobe of the phased array having randomly located elements[J]. IEEE Transactions on Antennas and Propagation, 1972, 20(2):129-136.