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Estimating Small Differences in Car-Pose from Orbits [article]

Berkay Kicanaoglu and Ran Tao and Arnold W.M. Smeulders
2018 arXiv   pre-print
with another orbit using a novel orbit metric to estimate the pose difference.  ...  The generated orbit in the latent space records all the differences in pose in the original observational space, and as a result, the method is capable of finding subtle differences in pose.  ...  , · : Figure 4 : 4 Visualizations of two orbits. 4KICANAOGLU ET AL.: ESTIMATING SMALL DIFFERENCES IN CAR-POSE FROM ORBITS Encoder Decoder . . . . . .  ... 
arXiv:1809.00720v1 fatcat:mu6fbs77dbfpdbl5i6tvh3xfya

Robust Object-based SLAM for High-speed Autonomous Navigation

Kyel Ok, Katherine Liu, Kris Frey, Jonathan P. How, Nicholas Roy
2019 2019 International Conference on Robotics and Automation (ICRA)  
We demonstrate ROSHAN in simulation where we outperform the baseline, reducing the median shape error by 83% and the median position error by 72% in a forward-moving camera sequence.  ...  problem in ellipsoid-based SLAM under common forward-translating vehicle motions.  ...  In both flight segments, the vehicles observed three cars, and did not explicitly orbit the cars. A.  ... 
doi:10.1109/icra.2019.8794344 dblp:conf/icra/OkLFHR19 fatcat:kgdqxm5ttjacdehmzhss22j73i

Evidence Suggesting that 'Oumuamua is the 30 Myr-old product of a Molecular Cloud [article]

Cheng-Han Hsieh, Gregory Laughlin, Hector G. Arce
2021 arXiv   pre-print
We obtain an a-priori order-of-magnitude age estimate for 'Oumuamua by comparing its orbit to the orbits of 50,899 F-type stars drawn from Gaia DR2; a diffusion model then suggests a ∼ 35 Myr dynamical  ...  We conduct Monte Carlo simulations that trace the orbits of test particles ejected from the stars in the Carina association.  ...  The small z max difference between the low-mass sample and the high-mass sample indicates z max is not strongly sensitive to residence times ranging from 2 Gyr to 10 Gyr (the approximate age of the galactic  ... 
arXiv:2105.14670v1 fatcat:s3vdlulhe5dzbk5i4uixim7ura

Page 137 of American Journal of Science Vol. 16, Issue 92 [page]

1903 American Journal of Science  
The suggestion of a galactic year, embracing many millions of solar years, and perhaps attended by changes in meteoric accessions received in different parts of the orbit, which modify the planetary atmospheres  ...  of a single revolution about the galactic axis, our solar system has endured much longer than is commonly sup- posed by astronomers, and its age is more nearly in agreement with the time estimates deduced  ... 

Single Target SAR 3D Reconstruction Based on Deep Learning

Shihong Wang, Jiayi Guo, Yueting Zhang, Yuxin Hu, Chibiao Ding, Yirong Wu
2021 Sensors  
In addition, the model also shows good generalization performance for targets not shown in the training set.  ...  In order to solve this problem, we propose to use a deep learning network to improve the resolution and SNR of 3D reconstruction results under the condition of very few observation orbits by learning the  ...  To estimate real situation, echoes are selected from three circle orbits to generate the raw BP images. There is only one degree apart between each circle orbit.  ... 
doi:10.3390/s21030964 pmid:33535468 fatcat:cdkyc7tvjbci3mj76pkomhzawy

Feature and Viewpoint Selection for Industrial Car Assembly [chapter]

Dirk Stößel, Marc Hanheide, Gerhard Sagerer, Lars Krüger, Marc Ellenrieder
2004 Lecture Notes in Computer Science  
Since high throughput must be achieved, object recognition and pose estimation heavily rely on offline preprocessing stages of available CAD data.  ...  In this paper, we propose a complete, universal framework for CAD model feature extraction and entropy index based viewpoint selection that is developed in cooperation with a major german car manufacturer  ...  Thus, model-based pose estimation meets the strong accuracy requirements of car industry.  ... 
doi:10.1007/978-3-540-28649-3_65 fatcat:glpzotbu7rcixeebyf3u5w5nhm

Negotiating uncertainty: asteroids, risk and the media

Felicity Mellor
2008 Public Understanding of Science  
This paper examines the way in which a small group of astronomers and planetary scientists have constructed asteroids as risky objects and have attempted to control the media representation of the issue  ...  Natural scientists often appear in the news media as key actors in the management of risk.  ...  Estimates of the average time intervals between impacts are also uncertain, being derived from estimates of the total population of each class of asteroid which are in turn deduced from the lunar cratering  ... 
doi:10.1177/0963662507087307 fatcat:xli25fh32rgq3g75j3v5mc4zie

Efficient feature extraction and likelihood fusion for vehicle tracking in low frame rate airborne video

K Palaniappan, F Bunyak, P Kumar, I Ersoy, S Jaeger, K Ganguli, A Haridas, J Fraser, R M Rao, G Seetharaman
2010 2010 13th International Conference on Information Fusion  
We have developed an interactive low frame rate tracking system based on a derived rich set of features for vehicle detection using appearance modeling combined with saliency estimation and motion prediction  ...  This research was partially supported by grants from the Leonard Wood Institute (LWI 181223) in cooperation with the U.S.  ...  The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied of LWI, ARL, AFRL or the U.S  ... 
doi:10.1109/icif.2010.5711891 fatcat:rvcifqlkyfcv5ap6hyv2eicyim

Detection of very-high-energy gamma-ray emission from the colliding wind binary eta Carinae with H.E.S.S

H.E.S.S. Collaboration
2020 Astronomy and Astrophysics  
H.E.S.S. detected VHE γ-ray emission from the direction of η Car shortly before and after the minimum in the X-ray lightcurve close to periastron.  ...  The region around η Car was observed with H.E.S.S. between orbital phase p = 0.78−1.10, with a closer sampling at p ≈ 0.95 and p ≈ 1.10 (assuming a period of 2023 days).  ...  The support of the Namibian authorities and of the University of Namibia in facilitating the construction and operation of H.E.S.S. is gratefully acknowledged, as is the support by the German Ministry  ... 
doi:10.1051/0004-6361/201936761 fatcat:nothv7phizhldir2rccyv3vgoq

POSE ESTIMATION OF A MOVING CAMERA WITH LOW-COST, MULTI-GNSS DEVICES

M. Lourakis, M. Pateraki, I.-A. Karolos, C. Pikridas, P. Patias
2020 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Without additional prior information, the pose of a camera estimated with computer vision techniques is expressed in a local coordinate frame attached to the camera's initial location.  ...  By combining exterior orientation from a known target with incremental pose changes inferred from accurate multi-GNSS positioning, the full 6 DoF pose of the camera is updated with low processing overhead  ...  The camera pose at a certain location (cf. eq. (1)) is obtained via pose estimation from a number of ground control points (GCPs).  ... 
doi:10.5194/isprs-archives-xliii-b2-2020-55-2020 fatcat:b3sbobokcvaffoxwep5ru2jfza

Effects of cubesat design parameters on image quality and feature extraction for 3D reconstruction

Jordyn Stoddard, David Messinger, John Kerekes
2014 2014 IEEE Geoscience and Remote Sensing Symposium  
ranging from 1-29 degrees depending on the complexity of the surface.  ...  For the nadir ground-sampled distance (GSD) range of 0.25 to 2 m, reconstruction results yielded building height estimates that varied by approximately two meters and surface normal estimates with an error  ...  Altitudes between 200 and 700 km were considered, ranging from sub-orbital to lowearth orbit altitudes.  ... 
doi:10.1109/igarss.2014.6946853 dblp:conf/igarss/StoddardMK14 fatcat:adeufbvsajhrnmlbuk77cehidy

Second‐Order Perturbation Energy of the Two‐Electron Atom

Charles W. Scherr
1960 Journal of Chemical Physics  
, by §E,= —3[Cn, Car P/[8(Cn, Car) —16(Cu, A) ] (2) where [Cu1, A] and [Cm, Ca] are exchange integrals defined in I.  ...  However, an estimate of the coupling constant with their function (on the assumption of orthogonal orbitals) yields a result that is nearly independent of the angle ¢, in disagreement with experiment.  ... 
doi:10.1063/1.1731129 fatcat:474ua3h7yfhzzh33fiorin6jti

X-RAY EMISSION FROM THE DOUBLE-BINARY OB-STAR SYSTEM QZ CAR (HD 93206)

E. R. Parkin, P. S. Broos, L. K. Townsley, J. M. Pittard, A. F. J. Moffat, Y. Nazé, G. Rauw, L. M. Oskinova, W. L. Waldron
2011 Astrophysical Journal Supplement Series  
We conclude that the X-ray emission from QZ Car can be reasonably well accounted for by a combination of contributions mainly from the single stars and the mutual wind-wind collision between systems A  ...  A semi-analytical model of QZ Car reveals that a stable momentum balance may not be established in either system A or B.  ...  ERP was supported in part by a Henry Ellison Scholarship from the University of Leeds, and by a PRODEX XMM/Integral contract (Belspo).  ... 
doi:10.1088/0067-0049/194/1/8 fatcat:4ewgb3qhn5hxzi4d2254grodny

Detection of very-high-energy γ-ray emission from the colliding wind binary η Car with H.E.S.S [article]

H.E.S.S. Collaboration, H. Abdalla, R. Adam, F. Aharonian, F. Ait Benkhali, E.O. Angüner, M. Arakawa, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes (+215 others)
2020 arXiv   pre-print
H.E.S.S. detected VHE γ-ray emission from the direction of η Car shortly before and after the minimum in the X-ray light-curve close to periastron.  ...  The region around η Car was observed with H.E.S.S. between orbital phase p = 0.78 - 1.10, with a closer sampling at p ≈ 0.95 and p ≈ 1.10 (assuming a period of 2023 days).  ...  for Berlin, Zeuthen, Heidelberg, Palaiseau, Paris, Saclay, Tbingen and in Namibia in the construction and operation of the equipment.  ... 
arXiv:2002.02336v1 fatcat:4zoiddgyuzgc7jvs7k6j5sqov4

Learning Robust Representations for Automatic Target Recognition [article]

Justin A. Goodwin, Olivia M. Brown, Taylor W. Killian, Sung-Hyun Son
2018 arXiv   pre-print
In this work, we evaluate different techniques for building robust classification architectures exploiting learned physical structure in received synthetic aperture radar signals of simulated 3D targets  ...  Given the high variability of complex-valued target responses, RF systems are susceptible to attacks masking true target characteristics from accurate identification.  ...  Radar can be used to help with scene characterization and automatic target recognition (ATR) to classify different detected targets (e.g., cars, pedestrians, obstacles) in the presence of different types  ... 
arXiv:1811.10714v1 fatcat:oxacrjgsezfc5j6ok2pz3f5nz4
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