Interpolation-free 3-D millimeter-wave imaging for security inspection

Chuan Lin; Jiefeng Zang

doi:10.1117/12.2617919

15 February 2022 Interpolation-free 3-D millimeter-wave imaging for security inspection

Chuan Lin, Jiefeng Zang

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 1216673 (2022) https://doi.org/10.1117/12.2617919
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

Millimeter-wave imaging has been regarded as key technique for next-generation personnel security inspection. Holographic imaging based on Fast Fourier Transform (FFT) is one of the most efficient algorithm for millimeter-wave imaging. However, during the process of holographic imaging, Stolt interpolation in the wavenumber-domain is employed to resample the 3-dimentional (3-D) data, which is time-consuming and also introduces additionally interpolation error. To overcome this weakness, an interpolation-free 3-D imaging algorithm is presented in this paper. The proposed algorithm reconstructs 3-D image exploiting 2-D FFT and inverse FFT (IFFT), and no interpolation is needed in the process. The algorithm is very suitable for parallel computation, and with prior knowledge of the position range of the target, the computation load of the 3-D image reconstruction could be further reduced. Numerical simulated data and real data from practical millimeter-wave imaging system have been used to verify the performance of the proposed algorithm. The results demonstrate that the proposed algorithm can achieve good image quality with high efficiency.

Citation Download Citation

Chuan Lin and Jiefeng Zang "Interpolation-free 3-D millimeter-wave imaging for security inspection", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 1216673 (15 February 2022); https://doi.org/10.1117/12.2617919

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KEYWORDS

Reconstruction algorithms

Detection and tracking algorithms

Holography

3D image processing

Millimeter wave imaging

3D image reconstruction

Imaging systems

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