Non-line-of-sight virtual modulated range migration imaging based on super-resolution histograms

High-resolution non-line-of-sight (NLOS) imaging under nanosecond time-resolution conditions is challenging in applications. We propose a novel NLOS imaging method consisting of deconvolution modified iterative back projection and virtual modulated range migration for low time-resolution system, obtaining super-resolution (SR) histogram signal and high-resolution NLOS images sequentially. The proposed method is applicable to both confocal and non-confocal configurations. Experimental results demonstrate that the method can obtain a 50 multiples SR histogram signal from 1 ns low resolution signals. Based on the SR histograms, our method can reconstruct higher resolution NLOS images with several times less data quantity than the related methods. These above advantages indicate that our method has significant application potential in NLOS systems with low time resolution.