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Structural Change Detection by Direct 3D Model Comparison

Marco Fanfani, Carlo Colombo
2019 Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications  
Changes are localized by direct comparison of time-separated 3D point clouds according to a majority voting scheme based on three criteria that compare density, shape and distribution of 3D points.  ...  As a by-product, a 4D (space + time) map of the scene can also be generated and visualized.  ...  However, some false positives are present in both the 3D heat-maps: This is probably due to errors in the 3D reconstruction.  ... 
doi:10.5220/0007260607600767 dblp:conf/visapp/FanfaniC19 fatcat:ldrvv2dfdbg6fnjq4lhz4lqia4

Comparison of a Reduced-Order Observer and a Full-Order Observer for Sensorless Synchronous Motor Drives

Toni Tuovinen, Marko Hinkkanen, Lennart Harnefors, Jorma Luomi
2012 IEEE transactions on industry applications  
Equations for the steady-state position error and for the linearized estimationerror dynamics under erroneous parameters are derived, and the robustness of the two observers against parameter errors is  ...  The observers are experimentally evaluated using a 6.7-kW synchronous reluctance motor drive in low-speed operation and under parameter errors.  ...  As the estimation error increases, the actual values of i d and i q change, resulting in changes in the actual values of L d and L q due to the magnetic saturation.  ... 
doi:10.1109/tia.2012.2226200 fatcat:azebeujdrvdvfc3gaolvjxaxri

Vision-based localization algorithm based on landmark matching, triangulation, reconstruction, and comparison

D.C.K. Yuen, B.A. MacDonald
2005 IEEE Transactions on robotics  
Many generic position-estimation algorithms are vulnerable to ambiguity introduced by nonunique landmarks.  ...  Reconstruction and comparison then rank the possible estimates. The LTRC algorithm has been implemented using an interpreted language, onto a robot equipped with a panoramic vision system.  ...  Most generic estimation procedures are vulnerable to the systematic error introduced by the erroneous observation pairs.  ... 
doi:10.1109/tro.2004.835452 fatcat:tqi6udpzird5zdvmyu7igefk3a

Experimental Comparison of Odometry Approaches [chapter]

Liz Murphy, Timothy Morris, Ugo Fabrizi, Michael Warren, Michael Milford, Ben Upcroft, Michael Bosse, Peter Corke
2013 Springer Tracts in Advanced Robotics  
Odometry is an important input to robot navigation systems, and we are interested in the performance of vision-only techniques.  ...  odometry and visual odometry, on a mobile robot operating in a typical indoor environment.  ...  The estimated error was mapped to a value in the range [0, 1] using the arctan of the error to give a confidence or weight α for the weighted average computation: X = αX VO + (1 − α)X wheel (3) whereX  ... 
doi:10.1007/978-3-319-00065-7_58 fatcat:cnyqf6mazjhirm6aegimigqjei

Antarctic non-stationary signals derived from Seasat-ERS-1 altimetry comparison

Frédérique Rémy, Benoit Legrésy
1998 Annals of Glaciology  
whole altimctric error budget. in a belt between 70° and 72° S and between 150° and 80° E, a precision better than 40 cm is found for the surface elevation change, while the change in height averaged  ...  Geographical changes in the height of the Antarctic ice sheet between 1978 and 1992 are mapped using altimeter data from Seasat and ERS-1 via an inverse technique that allows us to take imo account the  ...  The orbit error is dominated by frequencies of around I cycle per revolution mainly due to error in the gravity field and erroneous initial elements in the orbit.  ... 
doi:10.3189/1998aog27-1-81-85 fatcat:u6r7emzc5ffg7phqnkcomneuwu

Wi-Fi Fingerprint-Based Indoor Positioning: Recent Advances and Comparisons

Suining He, S.-H. Gary Chan
2016 IEEE Communications Surveys and Tutorials  
Among them, Wi-Fi (802.11) emerges as a promising one due to the pervasive deployment of wireless LANs (WLANs).  ...  Due to the absence of global positioning system (GPS) signal, many other signals have been proposed for indoor usage.  ...  Compared with [18] in Section III-A, CUA utilizes previously collected fingerprint map to reduce trajectory mapping errors.  ... 
doi:10.1109/comst.2015.2464084 fatcat:vgqxvxzrl5ddte7xi4x4rnd5oa

Beyond Counting: Comparisons of Density Maps for Crowd Analysis Tasks - Counting, Detection, and Tracking [article]

Di Kang, Zheng Ma, Antoni B. Chan
2018 arXiv   pre-print
The goal of this paper is to evaluate density maps generated by density estimation methods on a variety of crowd analysis tasks, including counting, detection, and tracking.  ...  Most existing CNN methods produce density maps with resolution that is smaller than the original images, due to the downsample strides in the convolution/pooling operations.  ...  The CNNbased density estimation methods have lower error than the traditional methods, especially the last four methods which reduce error by a large margin.  ... 
arXiv:1705.10118v2 fatcat:e3ch374usvam5jidgt4adi72mm

Comparison of pre- and self-calibrated camera calibration models for UAS-derived nadir imagery for a SfM application

David Griffiths, Helene Burningham
2018 Progress in physical geography  
With respect to errors in the XY plane, it is clear there is a positive correlation with errors in the Z-axis.  ...  Without the inclusion of accurate error estimation and noise detection system, robust measurement of elevation change in UAS-derived topographic maps is not possible.  ... 
doi:10.1177/0309133318788964 fatcat:t64r4dik3nairba2urks2s7s7m

Whole-Genome Scan, in a Complex Disease, Using 11,245 Single-Nucleotide Polymorphisms: Comparison with Microsatellites

Sally John, Neil Shephard, Guoying Liu, Eleftheria Zeggini, Manqiu Cao, Wenwei Chen, Nisha Vasavda, Tracy Mills, Anne Barton, Anne Hinks, Steve Eyre, Keith W. Jones (+5 others)
2004 American Journal of Human Genetics  
The high SNP density allows loci to be defined more precisely and provides a partial scaffold for association studies, substantially reducing the resource requirement for genemapping studies.  ...  In contrast, differences in maps employed in the analysis, the low detectable rate of genotyping error, and the presence of moderate linkage disequilibrium between markers did not significantly affect  ...  This work was supported by grants from the Arthritis Research Campaign, UK and the Medical Research Council, UK. We would like to thank the two anonymous reviewers for their helpful comments.  ... 
doi:10.1086/422195 pmid:15154113 pmcid:PMC1182008 fatcat:dwjk2lwa45h5rpqctgrejkklcq

A digital elevation model of the Antarctic ice sheet derived from ERS-1 altimeter data and comparison with terrestrial measurements

Jonathan L. Bamber
1994 Annals of Glaciology  
Regional biases associated with geoid, orbit and topography-induced errors reduce the accuracy of the height measurements. This was assessed by a comparison with ground-survey data.  ...  About 40% of these were rejected during a careful filtering procedure designed to remove erroneous values caused by poor tracking or complete loss of the returned echo.  ...  Funding for ].L.B. was through a U.K. NERC grant GR3j7836.  ... 
doi:10.3189/172756494794586934 fatcat:gfpru4dgwnazlgzojofpsm7i3q

Zen and the Art of Multiple Comparisons

Martin A. Lindquist, Amanda Mejia
2015 Psychosomatic Medicine  
We conclude by discussing effect size estimation, an issue often linked with the multiple comparisons problem.  ...  This article serves as an introduction to hypothesis testing and multiple comparisons for practical research applications, with a particular focus on its use in the analysis of functional magnetic resonance  ...  For example, by taking a larger sample size one can decrease the uncertainty related to the parameter estimate and thereby reduce the likelihood of making a Type II error.  ... 
doi:10.1097/psy.0000000000000148 pmid:25647751 pmcid:PMC4333023 fatcat:c5e5uolj7vbkzdllbylae42q64

A Comparison and Evaluation of Stereo Matching on Active Stereo Images

Mingyu Jang, Hyunse Yoon, Seongmin Lee, Jiwoo Kang, Sanghoon Lee
2022 Sensors  
Thus, in order to accurately estimate depth from stereo vision, it is important to obtain accurate disparity maps, which encode the difference between horizontal coordinates of corresponding image points  ...  However, in active stereo matching, the accuracy of the disparity map is influenced not only by those affecting the passive stereo technique, but also by the attributes of the generated pattern textures  ...  Acknowledgments: The authors would like to thank the editor and the reviewers for their contributions. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s22093332 pmid:35591022 pmcid:PMC9100404 fatcat:uxrvs3dna5cjxmnsgwusgtlxvm

Mitigating contamination in LSS surveys: a comparison of methods [article]

Noah Weaverdyck, Dragan Huterer
2020 arXiv   pre-print
We show how all the methods, including the popular pseudo-C_ℓ Mode Projection and Template Subtraction methods, can be interpreted under a common regression framework and use this to suggest improved estimators  ...  methods to treat the next-order multiplicative contamination in observed maps and power spectra.  ...  V B, the Elastic Net reduces overfitting by adding a prior on the template coefficients to reduce the number of templates used.  ... 
arXiv:2007.14499v1 fatcat:kyioh6jzjnhyxnasfdhsmqj2pa

Comparison of Three Techniques to Identify and Count Individual Animals in Aerial Imagery

Pat A. Terletzky, Robert Douglas Ramsey
2016 Journal of Signal and Information Processing  
Therefore, there is a need to provide additional techniques to improve survey methods for censusing wildlife species.  ...  Identification and counting of animals in remotely sensed imagery could provide wildlife managers with a tool to improve population estimates and aid in enumerating animals across large natural systems  ...  This research was supported by the Utah Agricultural Experiment Station, Utah State University, and approved as journal paper number 8910.  ... 
doi:10.4236/jsip.2016.73013 fatcat:fenw46m22zf45mt7k6gro7pcca

Comparison of the FMEA and STPA safety analysis methods–a case study

Sardar Muhammad Sulaman, Armin Beer, Michael Felderer, Martin Höst
2017 Software quality journal  
Furthermore, this study also evaluates the analysis process of both methods by using a qualitative criteria derived from the technology acceptance model (TAM).  ...  This paper presents a qualitative comparison of two hazard analysis methods, failure mode and effect analysis (FMEA) and system theoretic process analysis (STPA), using case study research methodology.  ...  11b System malfunctioning due to missing accelerator signal Catastrophic Malfunctioning of sensor (incorrect reading by sensor) 20 12a Torque will not be reduced due to missing change transmission  ... 
doi:10.1007/s11219-017-9396-0 fatcat:xzsq5pgfj5cvhjrpoczhln3tkm
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