Results 241 to 250 of about 82,398 (279)

Thermal Non-Line-of-Sight Imaging

2019 IEEE International Conference on Computational Photography (ICCP), 2019
We propose a novel non-line-of-sight (NLOS) imaging framework with long-wave infrared (IR). At long-wave IR wavelengths, certain physical parameters are more favorable for high-fidelity reconstruction. In contrast to prior work in visible light NLOS, at long-wave IR wavelengths, the hidden heat source acts as a light source. This simplifies the problem
Tomohiro Maeda, Yiqin Wang, Ramesh Raskar, Achuta Kadambi   +3 more
openaire   +1 more source

Toward Non-Line-of-Sight Videography

Optics and Photonics News, 2021
Seeing objects hidden from sight, in real time, could significantly expand humanity’s ability to explore the unknown.
Xiaohua Feng, Liang Gao
openaire   +1 more source

Non-line-of-sight imaging

Optics and Photonics News, 2019
Computational imaging techniques, sensitive photon detectors and considerable imagination are creating techniques for 3-D imaging of objects around corners and behind walls.
openaire   +2 more sources

Non-line-of-sight multiscatter propagation model

Journal of the Optical Society of America A, 2009
A propagation model that describes the characteristics of multiscatter radiation in atmosphere is presented. The model is based on the Monte Carlo method; each scattering process is set as an event of probability. LOWTRAN7 is used to calculate the atmospheric coefficients, and Mie theory is used to calculate the scattering characteristics of the ...
Hongwei, Yin, Shengli, Chang, Honghui, Jia, Jiankun, Yang, Juncai, Yang   +4 more
openaire   +2 more sources

Real-time non-line-of-sight imaging

ACM SIGGRAPH 2018 Emerging Technologies, 2018
Non-line-of-sight (NLOS) imaging aims at recovering the shape of objects hidden outside the direct line of sight of a camera. In this work, we report on a new approach for acquiring time-resolved measurements that are suitable for NLOS imaging. The system uses a confocalized single-photon detector and pulsed laser.
Matthew O'Toole, David B. Lindell, Gordon Wetzstein   +2 more
openaire   +1 more source

Foveated Non-line-of-sight Imaging

Imaging and Applied Optics Congress, 2020
Existing non-line-of-sight imaging techniques suffer from a tradeoff between field of view and spatial resolution. We propose an imaging system that tackles this tradeoff by efficiently combining information from transient imaging and correlography subsystems.
Akshat Dave, Muralidhar Madabhushi Balaji, Prasanna Rangarajan, Ashok Veeraraghavan, Marc P Christensen   +4 more
openaire   +1 more source

Non-Line-of-Sight Localization in Multipath Environments

IEEE Transactions on Mobile Computing, 2008
This paper presents a comprehensive Non Line of Sight (NLOS) localization scheme and a least square estimator that leverages on the bi-directional estimation of the Angle of Arrival (AOA) and Time of Arrival (TOA) of signals exchanged between mobile and reference devices.
Chee Kiat Seow, Soon Yim Tan
openaire   +1 more source

Non-Line-of-Sight Positioning for Mmwave Communications

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2018
Using information about the wireless communication channel is a well known approach to estimate a users position. So far it has been shown that such methods can provide positioning information in line-of-sight (LOS) situations by estimating channel properties like time of flight, direction of arrival, and direction of departure of a link between a ...
Felix Fellhauer, Jonas Lassen, Ahmed Jaber, Nabil Sven Loghin, Stephan ten Brink   +4 more
openaire   +1 more source

Non-Line-of-Sight Identification Without Channel Statistics

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020
Identifying non-line-of-sight (NLOS) conditions is important to discard, or improve, any location estimates that have been estimated with NLOS ranges. Typically, NLOS identification relies on channel statistics that have been collected for both LOS and NLOS channels. We investigate NLOS identification using distance residuals instead.
Bruno J. Silva, Gerhard P. Hancke 0002
openaire   +1 more source

On the Value of Collaboration in Non-Line-of-Sight Location Estimation

2014 IEEE Military Communications Conference, 2014
In this paper, we investigate the benefit of inter-node collaboration in multidimensional location estimation under nonline-of-sight signal propagation conditions using time-of-arrival range observations. Specifically, for a network of arbitrary size, we establish the value of collaboration for node positioning by proving that the inclusion of an ...
Javier Schloemann, R. Michael Buehrer
openaire   +1 more source