Auflistung nach Schlagwort "Errors"

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  • Analysis and correction of systematic height model errors 
    Jacobsen, Karsten (Göttingen : Copernicus GmbH, 2016)
    The geometry of digital height models (DHM) determined with optical satellite stereo combinations depends upon the image orientation, influenced by the satellite camera, the system calibration and attitude registration. ...
  • Analysis of an Ultra-precision Positioning System and Parametrization of Its Structural Model for Error Compensation 
    Denkena, Berend; Dahlmann, Dominik; Sassi, N. (Amsterdam : Elsevier BV, 2017)
    Conventional compensation of position errors of machine tools relies only on measured values. Due to this principle it is not always possible to compensate the errors in time, especially dynamic ones. Moreover, the relevant ...
  • Augmenting Milling Process Data for Shape Error Prediction 
    Denkena, Berend; Dittrich, Marc-André; Uhlich, Florian (Amsterdam : Elsevier B.V., 2016)
    New integrated sensors and connected machine tools generate a tremendous amount of in-depth process data. The continuous transformation of the obtained data into deployable machining knowledge allows for faster ramp-ups, ...
  • Block-to-point fine registration in terrestrial laser scanning 
    Wang, Jin (Basel : MDPI AG, 2013)
    Fine registration of point clouds plays an important role in data analysis in Terrestrial Laser Scanning (TLS). This work proposes a block-to-point fine registration approach to correct the errors of point clouds from TLS ...
  • Buhom: A Program for enhancement of geometric topologic consistency of building objects 
    Bildirici, I.O.; Heidorn, D. (Göttingen : Copernicus GmbH, 2004)
    Vector data is captured using various methods, e.g. manual digitizing, automatic vectorization etc. Errors or inconsistencies, e.g. self-cutting polygons, identical points etc, can not be avoided, even if digitizing is ...
  • Can coffee improve image guidance? 
    Wirz, Raul; Lathrop, Ray A.; Godage, Isuru S.; Burgner-Kahrs, Jessica; Russell, Paul T.; Webster, Robert J. (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    Anecdotally, surgeons sometimes observe large errors when using image guidance in endonasal surgery. We hypothesize that one contributing factor is the possibility that operating room personnel might accidentally bump the ...
  • Development of large area covering height model 
    Jacobsen, Karsten (Göttingen : Copernicus GmbH, 2014)
    Height information is a basic part of topographic mapping. Only in special areas frequent update of height models is required, usually the update cycle is quite lower as for horizontal map information. Some height models ...
  • Evaluation and optimization of parameters in the measurement for airborne scanner using response surface method 
    Zhang, Ding-bang; Zhang, Yi; Shen, Zheng; Cheng, Tao; Bai, Yongtao (London : SAGE Publications Ltd., 2019)
    This paper aims to evaluate the working parameters and try to make an optimized use of the parameters which affect the measurement accuracy of airborne scanner. First, based on response surface method, three levels of ...
  • Geometric accuracy analysis of worlddem in relation to AW3D30, srtm and aster GDEM2 
    Bayburt, S.; Kurtak, A.B.; Büyüksalih, G.; Jacobsen, Karsten (Göttingen : Copernicus GmbH, 2017)
    In a project area close to Istanbul the quality of WorldDEM, AW3D30, SRTM DSM and ASTER GDEM2 have been analyzed in relation to a reference aerial LiDAR DEM and to each other. The random and the systematic height errors ...
  • Innovative drive concept for machining robots 
    Denkena, Berend; Litwinski, K.; Schönherr, M. (Amsterdam : Elsevier, 2013)
    In this paper an innovative drive concept for robots to improve their machining capability is presented. As a test bed a two-axis robot is designed and equipped with torque motors with load-sided high resolution encoders ...
  • Measurement uncertainty caused by distance errors during in situ tests of wind turbines 
    Reschka, Cornelia; Koj, Sebastian; Fisahn, Sven; Garbe, Heyno (Göttingen : Copernicus, 2019)
    During the assessment of the electromagnetic emissions of wind turbines (WTs), the aspects of measurement uncertainty must be taken into account. Therefore, this work focuses on the measurement uncertainty which arises ...
  • Panorama imaging for image-to-physical registration of narrow drill holes inside spongy bones 
    Bergmeier, Jan; Fast, Jacob Friedemann; Ortmaier, Tobias; Kahrs, Lüder Alexander (Bellingham, Wash. : SPIE, 2017)
    Image-to-physical registration based on volumetric data like computed tomography on the one side and intraoperative endoscopic images on the other side is an important method for various surgical applications. In this ...
  • Scattered Pilot-Based Channel Estimation for Channel Adaptive FBMC-OQAM Systems 
    Fuhrwerk, Martin; Moghaddamnia, Sanam; Peissig, Jürgen (Piscataway, NJ : Institute of Electrical and Electronics Engineers Inc., 2017)
    Shaping the pulse of FilterBank MultiCarrier with Offset Quadrature Amplitude Modulation subcarrier modulation (FBMC-OQAM) systems offers a new degree of freedom for the design of mobile communication systems. In previous ...
  • Self-adjusting process monitoring system in series production 
    Denkena, Berend; Dahlmann, Dominik; Damm, J. (Amsterdam : Elsevier, 2015)
    Modern monitoring systems in machine tools are able to detect process errors promptly. Still, the application of monitoring systems is restricted by the complexity of parameterization for save monitoring. In most cases, ...
  • A similarity theory of locally homogeneous and isotropic turbulence generated by a Smagorinsky-type LES 
    Muschinski, Andreas (Cambridge : Cambridge University Press, 1996)
    A Kolmogorov-type similarity theory of locally homogeneous and isotropic turbulence generated by a Smagorinsky-type large-eddy simulation (LES) at very large LES Reynolds numbers is developed and discussed. The underlying ...
  • Stereo vision-based tracking of soft tissue motion with application to online ablation control in laser microsurgery 
    Schoob, Andreas; Kundrat, Dennis; Kahrs, Lüder Alexander; Ortmaier, Tobias (Amsterdam : Elsevier BV, 2017)
    Recent research has revealed that image-based methods can enhance accuracy and safety in laser microsurgery. In this study, non-rigid tracking using surgical stereo imaging and its application to laser ablation is discussed. ...
  • Sub-camera calibration of a Penta-camera 
    Jacobsen, Karsten; Gerke, M. (Göttingen : Copernicus GmbH, 2016)
    Penta cameras consisting of a nadir and four inclined cameras are becoming more and more popular, having the advantage of imaging also facades in built up areas from four directions. Such system cameras require a boresight ...
  • What is the spatial resolution of GRACE satellite products for hydrology? 
    Vishwakarma, Bramha Dutt; Devaraju, Balaji; Sneeuw, Nico (Basel : MDPI AG, 2018)
    The mass change information from the Gravity Recovery And Climate Experiment (GRACE) satellite mission is available in terms of noisy spherical harmonic coefficients truncated at a maximum degree (band-limited). Therefore, ...