Results 171 to 180 of about 9,293 (214)
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A geometric approach to subpixel registration accuracy
Computer Vision, Graphics, and Image Processing, 1987A method for estimating the translation offset between a pair of images to subpixel accuracy is described and analyzed. This method assumes the extraction of a digital edge representing a straight line in the image and then computes the best real line which could have given rise to the digital line.
Carlos Alberto Berenstein +3 more
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Geometric Accuracy of Three-Dimensional Molecular Overlays
Journal of Chemical Information and Modeling, 2006This study examines the dependence of molecular alignment accuracy on a variety of factors including the choice of molecular template, alignment method, conformational flexibility, and type of protein target. We used eight test systems for which X-ray data on 145 ligand-protein complexes were available.
Qi Chen, Richard E. Higgs, Michal Vieth
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Geometric Accuracy of Ikonos: Zoom In
IEEE Transactions on Geoscience and Remote Sensing, 2004Pioneering in the world, the high-resolution satellite Ikonos imagery has revolutionary changed the market - users now have the unique opportunity to get satellite images with spatial resolution comparable to middle-scale aerial photos. In our study, we tried to find an answer why such images, having submetre spatial resolution, still contain ...
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Accuracy of Geometric Estimation
2016We focus here on algebraic methods for ellipse fitting, fundamental matrix computation, and homography computation described in Chaps. 2, 3, and 6 in a more generalized mathematical framework. We do a detailed error analysis in general terms and derive explicit expressions for the covariance and bias of the solution. The hyper-renormalization procedure
Kenichi Kanatani +2 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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On Geometric Models and Their Accuracy for Extrinsic Sensor Calibration
2018 IEEE International Conference on Robotics and Automation (ICRA), 2018Extrinsic sensor calibration is an important task in robotics. There are various ways to perform the calibration task, but it often remains unclear which methods are better than the others. In this paper, we provide a systematic study about the calibration accuracy of three types of calibration methods, each represented by an abstract geometric model ...
Kaihong Huang, Cyrill Stachniss
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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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Improve geometric accuracy in robotic forming
Robotics and Computer-Integrated ManufacturingPeer ...
Yanrong Zhang +5 more
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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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