Abstract
In this paper, an enhanced phase-shift migration-based image reconstruction (EPSM-IR) algorithm was investigated to improve the computation efficiency for three-dimensional (3-D) terahertz (THz) holographic imaging. In the proposed algorithm, an appropriate decomposition of the phase-shift operator was performed and a fast algorithm based on FFT was introduced to solve the integral transformation which is the most time-consuming step in the conventional phase-shift migration. The analytical expression of the reconstructed 3-D point-spread function (PSF) was derived based on the EPSM-IR algorithm. The reduction of the computation cost was evaluated quantitatively as compared with the conventional phase-shift migration. Simulation results with fairly good agreement were given to verify the proposed algorithm. Finally, a monostatic prototype imager with a Gaussian beam transceiver was designed for the proof-of-principle experiments in the 0.2-THz band. The 3-D image results of a target with metal strips and a mannequin with concealed threat objects were given to demonstrate the effectiveness and the efficiency of the 3-D EPSM-IR algorithm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Terahertz Science and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
