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Automatic calibration of a single-projector catadioptric display system
2008
2008 IEEE Conference on Computer Vision and Pattern Recognition
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Simulation is used to validate estimated values of parameters and distance between the 3D reconstruction of the projection room and its expected geometry. ...
Influence of noise in detected point coordinates is studied and preliminary results for the reconstruction and projection in real conditions are reported. ...
Acknowledgements This work is funded by the Audiovisual and Multimedia Program of the French National Agency for Research (Catopsys project). ...
doi:10.1109/cvpr.2008.4587788
dblp:conf/cvpr/AstreSLZ08
fatcat:f7fsf74lkzal3e3h7ojlub77ke
A Forward Regridding Method With Minimal Oversampling for Accurate and Efficient Iterative Tomographic Algorithms
2016
IEEE Transactions on Image Processing
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Most of these iterative algorithms are based on an implementation of the Radon transform that acts as forward projector. ...
the time required for the reconstruction of underconstrained tomographic data sets without loss in the quality of the results. ...
of the proposed projector for iterative reconstruction. ...
doi:10.1109/tip.2016.2516945
pmid:26800537
fatcat:b6euvsnk5zcz5jnnjto2aenabe
Characterization of digital-micromirror device-based infrared scene projector
2005
Optical Engineering: The Journal of SPIE
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We compare MTF measurements for both mid-wave ͑MWIR͒ and longwave IR ͑LWIR͒ bands for an infrared laser scene projector based on the digital micromirror device ͑DMD͒. ...
The intended use will be for simulation and target training. Resolution and noise are significant parameters for target perception models of infrared imaging systems. ...
As expected, MTF performance of the projector was superior for MWIR than for LWIR radiation. ...
doi:10.1117/1.2013249
fatcat:6j4nvfdodjey7dxts66l2irs4i
Cuda Parallel Implementation of Image Reconstruction Algorithm for Positron Emission Tomography
2012
Open Medical Imaging Journal
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Although the use of iterative algorithms for image reconstruction in 3D Positron Emission Tomography (PET) has shown to produce images with better quality than analytical methods, they are computationally ...
The Siddon algorithm was used as Projector and Backprojector. Acceleration factors up to 85 times were achieved, with respect to a single thread CPU implementation. ...
Authors wish to acknowledge the Digital Processing Laboratory (DPLab) of UTN-FRBA for providing the GTX-480 used in the experiments presented in this paper. ...
doi:10.2174/1874347101206010108
fatcat:ie7dqyezsnb47igjvgl7ncjxae
Evolution of a high-performance and functionally robust musculoskeletal system in salamanders
2020
Proceedings of the National Academy of Sciences of the United States of America
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The evolution of ballistic tongue projection in plethodontid salamanders—a high-performance and thermally robust musculoskeletal system—is ideal for examining how the components required for extreme performance ...
in animal movement are assembled in evolution. ...
obtaining salamanders; and members of the S.M.D. laboratory for help imaging salamander feeding behavior. ...
doi:10.1073/pnas.1921807117
pmid:32341147
fatcat:xyeb73txvfdcbpmqqw7waacyri
High-resolution single-camera photogrammetry: incorporation of refraction at a fluid interface
2019
Experiments in Fluids
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The technique requires first for both the camera and the projector to be calibrated using triangulation. ...
This has the benefit that only one calibration for measurements is needed if the location and shape of the interface are known. ...
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, ...
doi:10.1007/s00348-019-2826-y
fatcat:xo5cln2vz5hvhansakqynqabsy
Stochastic Phase Estimation and Unwrapping
2019
Proceedings of the 8th International Conference on Pattern Recognition Applications and Methods
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Phase-shift is one of the most effective techniques in 3D structured-light scanning for its accuracy and noise resilience. ...
However, the periodic nature of the signal causes a spatial ambiguity when the fringe periods are shorter than the projector resolution. ...
INTRODUCTION The recent evolution of increasingly affordable and powerful 3D sensors and the consolidation of fast reconstruction algorithms enabled the widespread adoption of 3D data in both consumer ...
doi:10.5220/0007389402000209
dblp:conf/icpram/PistellatoBACGT19
fatcat:ktptyckgzvfrpdzlk6nxuwcymm
Coarse-to-fine surface reconstruction from silhouettes and range data using mesh deformation
2010
Computer Vision and Image Understanding
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Each iteration of the deformation algorithm involves smoothing and restructuring operations to regularize the surface evolution process. ...
The deformable mesh, which initially represents the object visual hull, is iteratively displaced towards the triangulated range surface using the line-of-sight information. ...
Acknowledgement This work has been supported by the European Network of Excellence 3DTV (http://www.3dtv-research.org). ...
doi:10.1016/j.cviu.2009.12.003
fatcat:icsnfovdpfevrnuvp3iyi4kzoe
Protective Measurement—A New Quantum Measurement Paradigm: Detailed Description of the First Realization
2021
Applied Sciences
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Furthermore, protective measurement allows finding the expectation value of an observable, i.e., an inherently statistical quantity, by measuring a single particle, without the need for any statistics. ...
We present a detailed description of the experiment realizing for the first time a protective measurement, a novel measurement protocol which combines weak interactions with a "protection mechanism" preserving ...
Hence, the expectation value can be evaluated as A = N H − N V N H + N V (8) where N H(V) is the number of count events obtained for the polarization H(V). ...
doi:10.3390/app11094260
fatcat:2evetvs2ljh2fahza2whqmwdxy
A priori estimation of memory effects in reduced-order models of nonlinear systems using the Mori–Zwanzig formalism
2017
Proceedings of the Royal Society A
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The Mori-Zwanzig (M-Z) procedure allows one to write down formally closed evolution equations for the resolved physics. ...
Results for under-resolved simulations of the Burgers and Kuramoto-Sivashinsky equations demonstrate that the proposed technique can accurately reconstruct the transfer of information between the resolved ...
The projector to be used for that set-up is a truncation: (Pf )(x) = f (x, 0) = f (x). (2.8) This projector can be seen as a conditional expectation in the limit where the probability density function ...
doi:10.1098/rspa.2017.0385
pmid:28989314
fatcat:x3aoe32yfvcltfff32y2ij5c24
Camera-Projector 3D Scanning of a Semi-Submerged Terrain in a Flume
2013
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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The paper presents a home-made 3d scanner, consisting of off-the-shelf components: a camera and a projector. ...
It is intended for monitoring dynamics of riverbed mophology observed under laboratory conditions in a flume, which is currently under construction. ...
Fig. 7 shows the image of decoded projector column numbers in the camera imagery. Values increase from low (blue) at the left side of the image, to high (red) at the right side as expected. ...
doi:10.5194/isprsannals-ii-4-w1-13-2013
fatcat:6fe32abx3zhbvcvaxuzd63n7ce
Direct Measurement of the Density Matrix of a Quantum System
2016
Physical Review Letters
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One drawback of conventional quantum state tomography is that it does not readily provide access to single density matrix elements, since it requires a global reconstruction. ...
This direct measurement method provides an operational meaning to the density matrix and promises to be especially useful for large dimensional states. ...
Whichever state jb 0 i that is chosen for the middle complementary projector serves as a reference for zero phase in the density matrix by fixing θ ¼ 0 for all values of a in hajb 0 i ¼ exp ðiθÞ= ffiffiffi ...
doi:10.1103/physrevlett.117.120401
pmid:27689255
fatcat:agz2scgbzrdbpaut4dpkolvate
Direct measurement of large-scale quantum states
[article]
2015
arXiv
pre-print
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In quantum mechanics, predictions are made by way of calculating expectation values of observables, which take the form of Hermitian operators. ...
Here, we show that the expectation values of a particular set of non-Hermitian matrices, which we call column operators, directly yield the complex coefficients of a quantum state vector. ...
While we expect unit purity, the 5% noise level accounts for the discrepancy with the measured value. ...
arXiv:1506.00851v2
fatcat:pttlyo66pffhvj2zj76q5fj7bm
Experimental neural network enhanced quantum tomography
[article]
2019
arXiv
pre-print
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Various sophisticated procedures for state and process reconstruction from measured data are well developed and benefit from precise knowledge of the model describing state preparation and the measurement ...
Quantum tomography is currently ubiquitous for testing any implementation of a quantum information processing device. ...
The authors acknowledge financial support under the Russian National Quantum Technologies Initiative and thank Timur Tlyachev and Dmitry Dylov for helpful suggestions on an early version of this study, ...
arXiv:1904.05902v2
fatcat:44ihchgalffjza2h6oy7whvcty
Intermittency in fractal Fourier hydrodynamics: Lessons from the Burgers equation
2016
Physical review. E
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2016 pre-print arXiv:1601.03697v1 fatcat:jxtrujxicrb47b35l7lgw4iapiOther Versions
In particular, we observe a suppression of intermittent fluctuations for D <1 and a quasi-singular transition from the fully intermittent (D=1) to the non-intermittent case for D ≲ 1. ...
We present theoretical and numerical results for the one-dimensional stochastically forced Burgers equation decimated on a fractal Fourier set of dimension D. ...
For this, we perform a series of numerical experiments by studying the evolution of the original partial differential equation restricted on a fractal set of Fourier modes [18] . ...
doi:10.1103/physreve.93.033109
pmid:27078449
fatcat:cl3hro3pw5cvxeftccpngop4ia
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