An efficient interpolation-free algorithm for cylindrical millimeter-wave holographic three-dimensional reconstruction

In this article, an efficient interpolation-free algorithm (IFA) applied for cylindrical millimeter-wave (MMW) holographic three-dimensional (3-D) reconstruction is proposed. Compared with previous cylindrical MMW holographic 3-D reconstruction methods, the proposed IFA can efficiently achieve high-quality 3-D reconstruction within the region of interest (ROI). In the IFA, the spherical wave data are decomposed into plane wave components along radial direction and height direction in the wavenumber domain. Then, an angle-matched filter function containing distance information of the ROI is utilized to reconstruct the corresponding cylindrical coordinate 3-D imaging result, whose radial maximum projection is then utilized to generate the 3-D point clouds of target surface. Finally, the 3-D surface is reconstructed based on the screened Poisson surface reconstruction method. Both simulation and experimental results validate the effectiveness of the proposed method.