Non-line-of-sight object location estimation from scattered light using plenoptic data

Takahiro Sasaki, James R. Leger

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We investigate the use of plenoptic data for locating non-line-of-sight (NLOS) objects from a scattered light signature. Using Fourier analysis, the resolution limits of the depth and transversal location estimates are derived from fundamental considerations on scattering physics and measurement noise. Based on the refocusing algorithm developed in the computer vision field, we derive an alternative formulation of the projection slice theorem in a form directly connecting the light field and a full spatial frequency spectrum including both depth and transversal dimensions. Using this alternative formulation, we propose an efficient spatial frequency filtering method for location estimation that is defined on a newly introduced mixed space frequency plane and achieves the theoretically limited depth resolution. A comparison with experimental results is reported.

Original languageEnglish (US)
Pages (from-to)211-228
Number of pages18
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number2
StatePublished - Feb 1 2021

Bibliographical note

Funding Information:
Defense Advanced Research Projects Agency (DARPA) REVEAL Program (HR0011-16-C-0024 P000005).

Publisher Copyright:
© 2021 Optical Society of America


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