Non-line-of-sight imaging

Daniele Faccio, Andreas Velten, Gordon Wetzstein

Research output: Contribution to journalArticlepeer-review

64 Scopus citations


Emerging single-photon-sensitive sensors produce picosecond-accurate time-stamped photon counts. Applying advanced inverse methods to process these data has resulted in unprecedented imaging capabilities, such as non-line-of-sight (NLOS) imaging. Rather than imaging photons that travel along direct paths from a source to an object and back to the detector, NLOS methods analyse photons that travel along indirect light paths, scattered from multiple surfaces, to estimate 3D images of scenes outside the direct line of sight of a camera, hidden by a wall or other obstacles. We review the transient imaging techniques that underlie many NLOS imaging approaches, discuss methods for reconstructing hidden scenes from time-resolved measurements, describe some other methods for NLOS imaging that do not require transient imaging and discuss the future of ‘seeing around corners’.
Original languageEnglish (US)
Pages (from-to)318-327
Number of pages10
JournalNature Reviews Physics
Issue number6
StatePublished - May 13 2020
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-14
Acknowledgements: G.W. and A.V. acknowledge financial support from DARPA REVEAL (HR0011-16-C-0025). G.W. is supported by NSF CAREER Award (IIS 1553333), PECASE (ARO, W911NF19-1-0120) and the Visual Computing Center CCF grant (KAUST Office of Sponsored Research). D.F. is supported by the Royal Academy of Engineering under the Chairs in Emerging Technologies scheme and by the EPSRC (UK, grant no. EP/T00097X/1).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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