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Common self-polar triangle of separate circles for light field camera calibration
2021
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
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A novel calibration pattern of separate circles is designed, and a light field camera calibration method based on common self-polar triangle with respect to separate circles is proposed in this paper. ...
First, we explore the uniquity and reconstruction of common self-polar triangle with respect to sperate circles. ...
Ｃｏｍｍｏｎ ｓｅｌｆ•ｐｏｌａｒ ｔｒｉａｎｇｌｅ ｏｆ ｓｅｐａｒａｔｅ ｃｉｒｃｌｅｓ ｆｏｒ ｌｉｇｈｔ ｆｉｅｌｄ ｃａｍｅｒａ ｃａｌｉｂｒａｔｉｏｎ［ Ｊ］ ． ...
doi:10.1051/jnwpu/20213930521
fatcat:gvmk55usnfbrlhgyxnx67urieu
Camera Models and Fundamental Concepts Used in Geometric Computer Vision
2010
Foundations and Trends in Computer Graphics and Vision
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Sturm is grateful to the Alexander-von-Humboldt Foundation for a Research Fellowship supporting his sabbatical at TU Munich, during which the largest part of this manuscript was written. ...
use images of their work. ...
The same holds true for self-calibration. The complete calibration of the true camera is then the combination of the warp, with the computed perspective (self-)calibration. ...
doi:10.1561/0600000023
fatcat:i5puai3btrb4vfcvc5zgqgwz3u
Enhancements to the Southern Pierre Auger Observatory
2012
Journal of Physics, Conference Series
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Ongoing and planned enhancements of the Pierre Auger Observatory ...
Projected timeline The RDA is expected to be operational in the Fall of 2011 and will collect data until at least June 2012. ...
Acknowledgments The successful installation, commissioning and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative ...
doi:10.1088/1742-6596/375/1/052006
fatcat:bnh64xonlnh2lnuwfcrpfd7ema
A mobile robot employing insect strategies for navigation
2000
Robotics and Autonomous Systems
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For example, the desert ant Cataglyphis is able to explore its desert habitat for hundreds of meters while foraging and return back to its nest precisely and on a straight line. ...
On the other hand, by taking the parsimonious navigation strategies of insects as a guideline, computationally cheap navigation methods for mobile robots are derived from the insights gained in the experiments ...
The authors thank Christian Gfeller (Rosys) for the fruitful cooperation. Many thanks to Marinus Maris and Hiroshi Kobayashi for their contributions in the construction of the robot. ...
doi:10.1016/s0921-8890(99)00064-0
fatcat:nojloe6f4rfchhne4auj2ak43m
Cuneiform Tablets Micro-Surveying in an Optimized Photogrammetric Configuration
2022
Heritage
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(active sensors) required to achieve the necessary level of accuracy and resolution; secondly, the needed professional skills for the macro-photogrammetric approach. ...
In this context, this research aims to meet the demand for a digital survey and 3D representation of small objects with complex surfaces and sub-millimeter morphological characteristics using a low-cost ...
) for sharing dataset, materials, and research; and Fabrizia Caiazzo, Vittorio Alfieri, and Paolo Argenio for the prototype of the circular steel calibrator. ...
doi:10.3390/heritage5040162
fatcat:6r5oar23cvaajf67ov4q7hryzy
FLARING BEHAVIOR OF THE QUASAR 3C 454.3 ACROSS THE ELECTROMAGNETIC SPECTRUM
2010
Astrophysical Journal
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The optical outbursts, which coincide with the passage of superluminal radio knots through the core, are accompanied by systematic rotation of the position angle of optical linear polarization. ...
Such rotation appears to be a common feature during the early stages of flares in blazars. We find correlations between optical variations and those at X-ray and γ-ray energies. ...
Since the camera has a wide field of view (14 × 14 ), we use field stars to perform both interstellar and instrumental polarization corrections. ...
doi:10.1088/0004-637x/715/1/362
fatcat:uio64se46japrd6pmqa5zibo5q
Noninvasive microtomographic inspection of rough surfaces by active triangulation
2001
Laser Metrology for Precision Measurement and Inspection in Industry
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A calibration method is based in considering the projector as an inverse camera which maps 2D image intensities into 3D rays, thus making the calibration of a projector the same as that of a camera. ...
A projector-camera system has been calibrated by this method, and a good 3D reconstruction quality has been achieved by the calibrated system. ...
Goal: For the participant to acquire basic notions of graphic programming language, in order to solve problems through software. ...
doi:10.1117/12.439209
fatcat:kc3xahntybhg5cyygebalmq7qa
2020 Index IEEE Transactions on Instrumentation and Measurement Vol. 69
2020
IEEE Transactions on Instrumentation and Measurement
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Meenalochani, M., and Sudha, S., Influence of Received Signal Strength on Prediction of Cluster Head and Number of Rounds; TIM June 2020 3739-3749 Hendeby, G., see Kasebzadeh, P., TIM Aug. 2020 5862 ...
Converter Using All-Digital Nested Delay-Locked Loops With 50-ps Resolution and High Throughput for LiDAR TIM Nov. 2020 9262-9271 Helsen, J., see Huchel, L., TIM July 2020 4145-4153 Hemavathi, N., ...
., TIM Oct. 2020 7781-7786
Self-Calibrated Absolute Thickness Measurement of Opaque Specimen
Based on Differential White Light Interferometry. ...
doi:10.1109/tim.2020.3042348
fatcat:a5f4fsqs45fbbetre6zwsg3dly
Measurements of the steady streaming flow around oscillating spheres using three dimensional particle tracking velocimetry
2008
Physics of Fluids
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The steady velocity field is found to disagree with available analytic calculations. ...
Granular particles vibrated in a fluid have been found to exhibit self-organization with attractive and repulsive interactions between the particles. ...
Since there are only two cameras, there is one conical region 'behind' the sphere that is inaccessible for each of the cameras, which suggests to really move the field of view slightly 'in front of' the ...
doi:10.1063/1.2973204
fatcat:vxlbqnskqfesjnzgeqo6ddtmoq
Three-dimensional reconstructions from cryoelectron microscopy images reveal an intimate complex between helicase DnaB and its loading partner DnaC
1998
Structure
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The results presented here provide a basis for a more complete understanding of the structure and function of these important proteins. Addresses: ...
DnaB is the major replicative DNA helicase in Escherichia coli and has been used as a model system for studying the structure and function of hexameric helicases. ...
Acknowledgements The authors wish to thank J Frank for use of the cryoEM facilities at the Wadsworth Center (Albany, NY) and R Grassucci for expert help with the cryoEM. ...
doi:10.1016/s0969-2126(98)00051-3
pmid:9562559
fatcat:tenxyfs72rbx7n5np64t62w7ce
15th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF)
1993
Computers & Fluids
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Acknowledgement The authors would like to thank Tianshu Liu for his advice concerning data comparison and his useful information for uncertainty analysis of camera systems. ...
ACKNOWLEDGEMENTS The authors gratefully acknowledge the efforts of Henry Baust for the development of the camera control macros as well as his efforts on data reduction and analysis. ...
from the cameras' field of view. ...
doi:10.1016/0045-7930(93)90012-x
fatcat:5un7rizd3jcblmj2fgh5rciy3a
The IceCube Neutrino Observatory - Contributions to ICRC 2017 Part VI: IceCube-Gen2, the Next Generation Neutrino Observatory
[article]
2017
arXiv
pre-print
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Acknowledgments We thank the Baikal collaboration for allowing the deployment of the POCAM prototype in GVD. ...
for self-as well as inter-DOM calibration. ...
In theory, this allows a lossless concentration of the light. ...
arXiv:1710.01207v1
fatcat:btcnlrb4znashasg7embg42w74
3D Scene Geometry Estimation from 360° Imagery: A Survey
2022
ACM Computing Surveys
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2024 pre-print arXiv:2401.09252v1 fatcat:kz5fimlqgzgxrp5czpq5gx4tmm
The stereo matching concepts are then extrapolated for multiple view camera setups, categorizing them among light fields, multi-view stereo, and structure from motion (or visual simultaneous localization ...
We first revisit the basic concepts of the spherical camera model and review the most common acquisition technologies and representation formats suitable for omnidirectional (also called 360°, spherical ...
For panoramas, earlier approaches for capturing the light field consisted of using a perspective-based light field imaging device coupled with an array of spherical mirrors [207] or rotated in a circular ...
doi:10.1145/3519021
fatcat:uyfy3ooxuvbufoebiwzy2g4wdq
MULTIWAVELENGTH VARIATIONS OF 3C 454.3 DURING THE 2010 NOVEMBER TO 2011 JANUARY OUTBURST
2012
Astrophysical Journal
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2012 pre-print arXiv:1208.4564v1 fatcat:ezkioqhspfggrijbadfpznxpmm
Discrete correlation anlaysis of the millimeter, far-infrared, and gamma-ray light curves show that the variations were essentially simultaneous, indicative of co-spatiality of the emission, at these wavebands ...
Based on these considerations and guided by the SEDs, we propose a model in which turbulent plasma crosses a conical standing shock in the parsec-scale region of the jet. ...
Since the polarization properties of blazars require irregularities in the magnetic field that are most easily understood as the effects of turbulence, scenarios similar to the TEMZ model appear to be ...
doi:10.1088/0004-637x/758/2/72
fatcat:pgerrx4drne27msppxcefl6aj4
Visual Navigation for Mobile Robots: A Survey
2008
Journal of Intelligent and Robotic Systems
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This survey presents those pieces of work, from the nineties until nowadays, which constitute a wide progress in visual navigation techniques for land, aerial and autonomous underwater vehicles. ...
Mobile robot vision-based navigation has been the source of countless research contributions, from the domains of both vision and control. ...
We also thank Lucrecia Rallo Fabra for her diligence and for her expert corrections and suggestions. ...
doi:10.1007/s10846-008-9235-4
fatcat:rkw4hdawznakjgccx32qt2etku
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