Non-line-of-sight imaging using a time-gated single photon avalanche diode.
TLDR
A non-line-of-sight imaging system that uses a single-pixel, single-photon avalanche diode (SPAD) to collect time- of-flight information that provides significant improvements in terms of power requirements, form factor, cost, and reconstruction time, while maintaining a comparable time resolution.Abstract:
By using time-of-flight information encoded in multiply scattered light, it is possible to reconstruct images of objects hidden from the camera’s direct line of sight. Here, we present a non-line-of-sight imaging system that uses a single-pixel, single-photon avalanche diode (SPAD) to collect time-of-flight information. Compared to earlier systems, this modification provides significant improvements in terms of power requirements, form factor, cost, and reconstruction time, while maintaining a comparable time resolution. The potential for further size and cost reduction of this technology make this system a good base for developing a practical system that can be used in real world applications.read more
Citations
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On the use of deep learning for computational imaging
TL;DR: This paper relates the deep-learning-inspired solutions to the original computational imaging formulation and use the relationship to derive design insights, principles, and caveats of more general applicability, and explores how the machine learning process is aided by the physics of imaging when ill posedness and uncertainties become particularly severe.
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Confocal non-line-of-sight imaging based on the light-cone transform.
TL;DR: The resolution bounds of NLOS imaging are quantified, its potential for real-time tracking is demonstrated, and efficient algorithms that incorporate image priors and a physically accurate noise model are derived.
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Detection and tracking of moving objects hidden from view
TL;DR: An experimental method is demonstrated that allows them to locate and track moving targets that are hidden from the direct line of sight, for example, by a wall or an obstacle, with only a few seconds acquisition time and centimetre precision.
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Non-line-of-sight imaging using phasor-field virtual wave optics
Xiaochun Liu,Ibón Guillén,Marco La Manna,Ji Hyun Nam,Syed Azer Reza,Toan Huu Le,Adrian Jarabo,Diego Gutierrez,Andreas Velten +8 more
TL;DR: This work shows that the problem of non-line-of-sight imaging can be formulated as one of diffractive wave propagation, by introducing a virtual wave field that is term the phasor field, and yields a new class of imaging algorithms that mimic the capabilities of line- of-sight cameras.
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Quantum-inspired computational imaging
Yoann Altmann,Stephen McLaughlin,Miles J. Padgett,Vivek K Goyal,Alfred O. Hero,Daniele Faccio +5 more
TL;DR: A new generation of imaging devices is emerging, together with an unprecedented technological leap forward and new imaging applications that were previously difficult to imagine, including full three-dimensional imaging of scenes that are hidden from direct view (e.g., around a corner or behind an obstacle).
References
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TL;DR: In this paper, the design and fabrication of a single-photon avalanche diode (SPAD) array system for counting and time-tagging single photons by means of a monolithic array sensor is discussed.
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Dual photography
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