Novel method to measure track irregularity based on multiple MEMS-IMU and geometric constraint. [PDF]
Sci RepWang Y +5 more
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Investigation of Stereolithography Additively Manufactured Components for Deviations in Dimensional and Geometrical Features. [PDF]
Polymers (Basel)Kalilayeva A +4 more
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In Vitro Assessment of Linear Dimensional Accuracy of Polyvinyl Siloxane-Based Computer-Aided Design and Transparent Interocclusal Record Materials at 3 Different Storage Times. [PDF]
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Three‐dimensional measurement accuracy of skull surface landmarks
American Journal of Physical Anthropology, 1988AbstractCraniometric measuremnts from a three‐dimensional (3‐D) digitizing system were compared with those from sliding and spreading calipers. The 3‐D system consisted of a 3‐Space Digitizer, Macintosh Plus computer, and Unigraphics CAD/CAM system. Twenty‐nine standard measurements were made and repeated on two normal and three deformed skulls.
Charles F. Hildebolt, Michael W. Vannier
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Methods to improve the dimensional measurement accuracy of a motion tracking system
Optics and Lasers in Engineering, 2020Abstract Photogrammetry-based motion tracking systems are widely used in entertainment, medicine, sports, and other industries for low accuracy positioning applications. Camera-based systems track cooperative markers on objects to obtain their real-time positions and poses.
Vincent D. Lee +4 more
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Three-dimensional measurement: The accuracy and precision of the reflex metrograph
British Journal of Oral and Maxillofacial Surgery, 1988The Reflex Metrograph is an optical plotter which is linked directly to a microcomputer and allows direct three-dimensional measurements of irregular shaped objects up to 300 mm maximum dimension without contacting the object. This study shows that it is possible to generate reproducible results with an operator measurement error of less than 0.2 mm ...
B, Speculand +2 more
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In-process dimensional measurement and control of workpiece accuracy
International Journal of Machine Tools and Manufacture, 1997Abstract This paper surveys the available technology for “in-process control” of machined products, particularly in relation to turning, and cylindrical grinding, prior to completion of the machining process. The techniques developed for controlling accuracy of the workpiece, whilst in situ , are described using representative examples of current ...
M. Burdekin, T. Yandayan
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The accuracy of measurements of three-dimensional computed tomography reconstructions [PDF]
Journal of Oral and Maxillofacial Surgery, 1996 The purpose of this study was to evaluate the accuracy and reproducibility of linear measurements obtained from three-dimensional reconstructions of computed tomography (CT) scans.Ten rectangular acrylic blocks were prepared with titanium molybdenum alloy (TMA) markers spaced from 1 to 10 mm, respectively.
George J. Cisneros +3 more
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Dual-frequency fringe for improving measurement accuracy of three-dimensional shape measurement [PDF]
Chinese Optics Letters, 2021 A new phase unwrapping method based on dual-frequency fringe is proposed to improve both high accuracy and large measurement range of three-dimensional shape measurement by synthesizing the projected dual-frequency fringes obtaining higher and lower frequencies.
Zixiao Miao, Qican Zhang
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Through‐focus scanning optical microscopy (TSOM) is an economical, non‐contact and nondestructive method for rapid measurement of three‐dimensional nanostructures.
Haitao Nie +3 more
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