气候变化领域集成服务门户(CCPortal): Non–line-of-sight imaging over 1.43 km

CCPortal

DOI	10.1073/pnas.2024468118
	Non–line-of-sight imaging over 1.43 km
	Wu C.; Liu J.; Huang X.; Li Z.-P.; Yu C.; Ye J.-T.; Zhang J.; Zhang Q.; Dou X.; Goyal V.K.; Xu F.; Pan J.-W.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	Non–line-of-sight (NLOS) imaging has the ability to reconstruct hidden objects from indirect light paths that scatter multiple times in the surrounding environment, which is of considerable interest in a wide range of applications. Whereas conventional imaging involves direct line-of-sight light transport to recover the visible objects, NLOS imaging aims to reconstruct the hidden objects from the indirect light paths that scatter multiple times, typically using the information encoded in the time-of-flight of scattered photons. Despite recent advances, NLOS imaging has remained at short-range realizations, limited by the heavy loss and the spatial mixing due to the multiple diffuse reflections. Here, both experimental and conceptual innovations yield hardware and software solutions to increase the standoff distance of NLOS imaging from meter to kilometer range, which is about three orders of magnitude longer than previous experiments. In hardware, we develop a high-efficiency, low-noise NLOS imaging system at near-infrared wavelength based on a dual-telescope confocal optical design. In software, we adopt a convex optimizer, equipped with a tailored spatial–temporal kernel expressed using three-dimensional matrix, to mitigate the effect of the spatial–temporal broadening over long standoffs. Together, these enable our demonstration of NLOS imaging and real-time tracking of hidden objects over a distance of 1.43 km. The results will open venues for the development of NLOS imaging techniques and relevant applications to real-world conditions. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Computational imaging; Computer vision; Non–line-of-sight imaging; Optical imaging
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180401
作者单位	Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, China; Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai, 201315, China; Shanghai Research Center for Quantum Sciences, Shanghai, 201315, China; School of Earth and Space Science, University of Science and Technology of China, Hefei, 230026, China; School of Electronic Information, Wuhan University, Wuhan, 430072, China; Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215, United States
推荐引用方式 GB/T 7714	Wu C.,Liu J.,Huang X.,等. Non–line-of-sight imaging over 1.43 km[J],2021,118(10).
APA	Wu C..,Liu J..,Huang X..,Li Z.-P..,Yu C..,...&Pan J.-W..(2021).Non–line-of-sight imaging over 1.43 km.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Wu C.,et al."Non–line-of-sight imaging over 1.43 km".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).