近程毫米波圆柱扫描三维成像算法研究
首发时间:2018-05-04
摘要:近年来,由于传统安检方式的诸多不足,一种新型的安检手段-毫米波成像技术应运而生。按照发射毫米波的天线阵列的扫描方式,可以分为平面扫描和圆柱扫描,由于圆柱扫描成像技术相比平面扫描具有多角度观察的能力优势,所以研究其成像技术很有必要。本文主要是研究一种主动式近程毫米波圆柱扫描三维成像技术中的波数域算法,在文中分析了该算法的优点以及整个算法的推导过程,以及成像系统在直角坐标系下成像分辨率问题。通过对算法进行单点、多点仿真成像,证明了波数域算法的有效性。最后利用该算法进行实测数据的三维成像,成像结果较好,表明了该算法可以应用在人体安检领域的毫米波圆柱扫描三维成像体制中。
关键词: 安检 毫米波成像 圆柱扫描 近程 三维成像 波数域算法
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Research on Cylindrical Scanning Three-dimensional Imaging Algorithm of Short Range Millimeter-wave
Abstract:In recent years, due to the shortcomings of traditional security inspection methods, millimeter-wave imaging technology emerged as a new means of security inspection. According to the scanning mode of the antenna array for transmitting millimeter-wave, it can be divided into plane scanning and cylindrical scanning, since cylindrical scanning imaging has the advantages of multi angle observation compared with plane scanning, it is necessary to study its imaging technology. This paper is mainly concerned with a wavenumber domain algorithm of active short-range millimeter-wave cylindrical scanning three-dimensional imaging technology, the advantages of the algorithm, the derivation of the whole algorithm and the imaging resolution of the imaging system in the rectangular coordinate system are analyzed in this paper. The validity of the algorithm in wavenumber domain is proved by the simulation of single point, multi-point imaging. Finally, the algorithm is used for three-dimensional imaging of measured data, which shows that the algorithm can be applied to the millimeter-wave cylindrical scanningthree-dimensionalimaging system in the field of human security.
Keywords: security inspection millimeter-wave imaging cylindrical scanning short range three-dimensional imaging wavenumber domain algorithm
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