Results 21 to 30 of about 568,064 (303)

Three-Dimensional Object Recognition With Multiview Photon-Counting Sensing and Imaging

open access: yesIEEE Photonics Journal, 2009
We present a method for photon-counting sensing with three-dimensional (3-D) integral imaging for object recognition using independent component analysis (ICA). A lenslet array is used to capture multiple perspective images of a 3-D scene projected onto
Cuong Manh Do, Bahram Javidi
doaj   +1 more source

Study on Single Photon Imaging Method for Permanent Shadow Crater of the Moon [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The detection of the permanent shadow area of the moon is currently a research hotspot. As the name suggests, there is no light in the permanent shadow area, and traditional methods cannot image it. This paper proposes a single photon imaging method that
Z. Xia
doaj   +1 more source

An Entropy-Based Anti-Noise Method for Reducing Ranging Error in Photon Counting Lidar

open access: yesEntropy, 2021
Photon counting lidar for long-range detection faces the problem of declining ranging performance caused by background noise. Current anti-noise methods are not robust enough in the case of weak signal and strong background noise, resulting in poor ...
Mingwei Huang   +4 more
doaj   +1 more source

Quantum detector tomography of a time-multiplexed superconducting nanowire single-photon detector at telecom wavelengths [PDF]

open access: yes, 2013
Superconducting nanowire single-photon detectors (SNSPDs) are widely used in telecom wavelength optical quantum information science applications. Quantum detector tomography allows the positive-operator-valued measure (POVM) of a single-photon detector ...
Natarajan, C.M.   +23 more
core   +1 more source

Photon Counting 3-D Object Recognition Using Digital Holography [PDF]

open access: yes, 2013
We present an analysis of the recognition performance of 3-D objects reconstructed from digital holograms recorded under photon counting conditions. The digital holograms are computed by applying four-step phase-shifting techniques to interferograms ...
Pla, Filiberto   +3 more
core   +1 more source

Evaluation and Improvement of Lidar Performance Based on Temporal and Spatial Variance Calculation

open access: yesApplied Sciences, 2019
Poisson distributions have the characteristic of equality between their variance and mean values. By constructing a calculation model of the temporal variance and spatial variance, the relationship between the variance and mean values of lidar analog ...
Fei Gao   +7 more
doaj   +1 more source

Effect of Deep-Level Defects on the Performance of CdZnTe Photon Counting Detectors

open access: yesSensors, 2020
The effect of deep-level defects is a key issue for the applications of CdZnTe high-flux photon counting devices of X-ray irradiations. However, the major trap energy levels and their quantitive relationship with the device’s performance are not yet ...
Yingrui Li   +7 more
doaj   +1 more source

Single-Photon Counting Detectors

open access: yesIEEE Photonics Journal, 2011
Various new developments for array detectors based on Silicon Single-Photon Avalanche Diodes (SPADs) were reported. Improved Si-SPAD technologies brought higher detection efficiency in the red wavelength range. Higher performance was attained with InGaAs/
Sergio D. Cova, Massimo Ghioni
doaj   +1 more source

Measurement of Background Energy Content of a Linear cw Colliding PulseMode-Locked Dye Laser [PDF]

open access: yes, 1991
The background energy content of a linear cw CPM rhodamine 6G-DODCI femtosecond dye laser is determined by time- resolved measurement of the Rayleigh scattered signal in a colloidal silicon dioxid suspension with an ungated inverse time- correlated ...
Bäumler, W., Penzkofer, Alfons
core   +1 more source

The Future Arrived: Photon-Counting Detector CT. [PDF]

open access: yes, 2023
In the past decades, we have witnessed tremendous technical innovations in computed tomography (CT) imaging. These included improvements in temporal and spatial resolution, lowering of the radiation dose, the introduction of dual-energy and multi-energy ...
Runge, Val   +4 more
core   +1 more source

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