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Geometric accuracy analysis for discrete surface approximation
Computer Aided Geometric Design, 2007zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Junfei Dai +6 more
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Evaluation of geometric accuracy and the features of TanDEM-X
SPIE Proceedings, 2011The current study evaluated the geometric accuracy of TanDEM-X twice in-situ by simultaneous observations using several corner reflectors. We set the reflectors on the flat ground, and measured the position of the reflectors before and after the satellite pass using GPS and achieved the accuracies within several centimeters.
Takashi Nonaka +2 more
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On the Geometrical Accuracy in Incremental Sheet Forming
2021The industrial application of incremental sheet forming (ISF) still stays behind the expectations due to the low geometrical accuracy of the produced parts as well as the insufficient predictability of the forming result. This is due to the fact that some mechanisms which cause the geometrical deviations are not fully understood.
Gerhard Hirt +4 more
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The problems of accuracy and robustness in geometric computation
Computer, 1989Practical implementation of geometric operations remains error-prone, and the goal of implementing correct and robust systems for carrying out geometric computation remains elusive. The problem is variously characterized as a matter of achieving sufficient numerical precision, as a fundamental difficulty in dealing with interacting numeric and symbolic
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Enhancement of geometric accuracy via an intermediate geometrical feedback scheme
Journal of Manufacturing Systems, 1999Abstract To enhance the geometric accuracy of a machined part, both the static and dynamic errors present in the NC machining procedure should be handled in some manner. This paper presents systematic compensation methods for these errors based on an intermediate geometrical feedback scheme.
Suh, SH, Lee, ES, Sohn, JW
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Geometric accuracy of reconstructed PET images
1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255), 2002The registration of multimodality brain studies (PET & MRI) requires geometrically identical properties of the acquired images. In particular, if pixel by pixel manipulations are performed, e.g., for partial volume corrections of PET images, geometrical discrepancies in the images of one modality lead to erroneous results.
E.R. Kops, T. Schmitz, H. Herzog
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Geometric Accuracy Analysis for Discrete Surface Approximation
2006In geometric modeling and processing, computer graphics and computer vision, smooth surfaces are approximated by discrete triangular meshes reconstructed from sample points on the surface. A fundamental problem is to design rigorous algorithms to guarantee the geometric approximation accuracy by controlling the sampling density.
Junfei Dai +3 more
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Statistical Approach to Assessments of Geometrical Accuracy
CIRP Annals, 2002Abstract Statistical properties of the minimax assessments of the geometric accuracy are investigated. The cases when a distribution of the point deviations differs from the normal distribution are especially considered. Among such cases, the roundness deviations of the profile, which is composed of few harmonics, is of fundamental importance.
V.T. Portman +2 more
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Geometric accuracy in airborne SAR images
IEEE Transactions on Aerospace and Electronic Systems, 1989Uncorrected across-track motions of a synthetic aperture radar (SAR) platform can cause both a severe loss of azimuthal positioning accuracy in, and defocusing of, the resultant SAR image. It is shown how the results of an autofocus procedure can be incorporated in the azimuth processing to produce a fully focused image that is geometrically accurate ...
D. Blacknell +7 more
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Geometric Accuracy of Machine Tools
2018Geometric accuracy belongs to one of the main parameters of the machine tool. It serves not only for the purpose of machine delivery to the customer or for demonstration of proper service intervention but also for assessment of improvements compared to the current state. The information on geometric accuracy of the machine is also used as a feedback to
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