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Journal articles on the topic '3D measurement systems'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Suwardhi, D., S. W. Trisyanti, L. Kamal, H. A. Permana, A. Murtiyoso, and K. N. Fauzan. "POLYFIT ASSISTED MONOSCOPIC MULTI-IMAGE MEASUREMENT SYSTEMS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W17 (November 29, 2019): 347–54. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w17-347-2019.

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Abstract. Nowadays, in light of the latest development in three-dimensional (3D) modeling technology, an essential role is given to the research and development of fully-automated or semi-automated processes in order to increase workflow effectiveness. A key challenge is thus to automate the process leading to the geometric model which supports the Building Information Modeling (BIM) or 3D-Geographical Information Systems (3D-GIS). This 3D model usually originates from image-based or range-based point clouds. This research is the beginning of the development of a 3D modeling approach that is s

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Sun, Zhong Yuan, Alexander Schuler, and Tino Hausotte. "Development of a 3D Tunneling Current Probing System for Micro- and Nano-Coordinate Metrology." Applied Mechanics and Materials 870 (September 2017): 126–31. http://dx.doi.org/10.4028/www.scientific.net/amm.870.126.

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The demands for precision measurement of three dimensional micro-and nanogeometries over a large area have rapidly increased during the last few years. To meet such requirements, many different nanometre resolving 3D capable probing sensors and corresponding 3D positioning systems to operate the sensors for 3D measurements have been developed. The mechanical contact-free, electrical work piece probing based on the scanning tunneling microscopy principle offers new possibilities for 3D micro coordinate measurements as well as for nanometre resolved topography measurements in micro-and nanometro

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Paquette, Steven, J. David Brantley, Brian D. Corner, Peng Li, and Thomas Oliver. "Automated Extraction of Anthropometric Data from 3D Images." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 44, no. 38 (2000): 727–30. http://dx.doi.org/10.1177/154193120004403811.

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The use of 3D scanning systems for the capture and measurement of human body dimensions is becoming commonplace. While the ability of available scanning systems to record the surface anatomy of the human body is generally regarded as acceptable for most applications, effective use of the images to obtain anthropometric data requires specially developed data extraction software. However, for large data sets, extraction of useful information can be quite time consuming. A major benefit therefore is to possess an automated software program that quickly facilitates the extraction of reliable anthr

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Kosarevsky, S., and V. Latypov. "Detection of Screw Threads in Computed Tomography 3D Density Fields." Measurement Science Review 13, no. 6 (2013): 292–97. http://dx.doi.org/10.2478/msr-2013-0043.

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Abstract Measurements and inspection in production must be rapid, robust and automated. In this paper a new method is proposed to automatically detect screw threads in 3D density fields obtained from computed tomography measurement devices. The described method can be used to automate many operations during screw thread inspection process and drastically reduce operator’s influence on the measurement process resulting in lower measurement times and increased repeatability.

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Yang, Pengfei, Sebastian Schafer, Kevin Royalty, Azam Ahmed, David Niemann, and Charles Strother. "Measurement in the angiography suite: evaluation of vessel sizing techniques." Journal of NeuroInterventional Surgery 8, no. 9 (2015): 965–68. http://dx.doi.org/10.1136/neurintsurg-2015-011920.

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BackgroundAccurate vessel size measurement is important for neurointervention. Modern angiographic equipment offers various two-dimensional (2D) and 3D measurement methods that have not been systematically evaluated for accuracy and reliability.ObjectiveTo evaluate these methods using anthropomorphic vessel phantoms.Materials and methodsTubing of known sizes (2–5 mm, 1 mm increments) was embedded in 3D-printed skulls to simulate the middle cerebral artery, internal carotid artery, and basilar artery. Each phantom was imaged to gain 3D DSA, 2D DSA, and DynaCT images. Three identical measurement

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Traxler, Lukas, Laurin Ginner, Simon Breuss, and Bernhard Blaschitz. "Experimental Comparison of Optical Inline 3D Measurement and Inspection Systems." IEEE Access 9 (2021): 53952–63. http://dx.doi.org/10.1109/access.2021.3070381.

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Todo, Chikage, Hidetoshi Ikeno, Keitaro Yamase, et al. "Reconstruction of Conifer Root Systems Mapped with Point Cloud Data Obtained by 3D Laser Scanning Compared with Manual Measurement." Forests 12, no. 8 (2021): 1117. http://dx.doi.org/10.3390/f12081117.

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Three-dimensional (3D) root system architecture (RSA) is a predominant factor in anchorage failure in trees. Only a few studies have used 3D laser scanners to evaluate RSA, but they do not check the accuracy of measurements. 3D laser scanners can quickly obtain RSA data, but the data are collected as a point cloud with a large number of points representing surfaces. The point cloud data must be converted into a set of interconnected axes and segments to compute the root system traits. The purposes of this study were: (i) to propose a new method for easily obtaining root point data as 3D coordi

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Chuguy, Yuri V. "Optical Measurement Technologies and Systems for Industrial Applications." Key Engineering Materials 295-296 (October 2005): 201–8. http://dx.doi.org/10.4028/www.scientific.net/kem.295-296.201.

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Ensuring the safety of nuclear reactors and their high exploitation reliability requires a 100 % noncontact precise inspection of geometrical parameters of their fuel elements, grid spacers and quality of fuel element surface. For the solution of these 3D inspection tasks we have developed and produced a laser measuring machine (LMM) using multipoint structured illumination, optoelectronic shadow systems as Control and optical low-coherent profilometer as Radar. The results of their industrial testing are presented and discussed.

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Bösemann, Werner. "INDUSTRIAL PHOTOGRAMMETRY - ACCEPTED METROLOGY TOOL OR EXOTIC NICHE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (June 15, 2016): 15–24. http://dx.doi.org/10.5194/isprs-archives-xli-b5-15-2016.

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New production technologies like 3D printing and other adaptive manufacturing technologies have changed the industrial manufacturing process, often referred to as next industrial revolution or short industry 4.0. Such Cyber Physical Production Systems combine virtual and real world through digitization, model building process simulation and optimization. It is commonly understood that measurement technologies are the key to combine the real and virtual worlds (eg. [Schmitt 2014]). <br><br> This change from measurement as a quality control tool to a fully integrated step in the prod

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Liu, Wancun, Liguo Zhang, Xiaolin Zhang, and Lianfu Han. "3D Snow Sculpture Reconstruction Based on Structured-Light 3D Vision Measurement." Applied Sciences 11, no. 8 (2021): 3324. http://dx.doi.org/10.3390/app11083324.

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Structured-light technique is an effective method for indoor 3D measurement, but it is hard to obtain ideal results outdoors because of complex illumination interference on sensors. This paper presents a 3D vision measurement method based on digital image processing to improve resistance to noise of measuring systems, which ensuresnormal operation of a structured-light sensor in the wild without changing its components, and the method is applied in 3D reconstruction of snow sculpture. During image preprocessing, an optimal weight function is designed based on noise classification and minimum e

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Tien, F. C., and C. A. Chang. "Using neural networks for 3D measurement in stereo vision inspection systems." International Journal of Production Research 37, no. 9 (1999): 1935–48. http://dx.doi.org/10.1080/002075499190842.

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Yu, Jing, Yaqin Zhang, Zewei Cai, et al. "An improved projector calibration method for structured-light 3D measurement systems." Measurement Science and Technology 32, no. 7 (2021): 075011. http://dx.doi.org/10.1088/1361-6501/abe447.

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Canali, C., K. Aristovich, L. Ceccarelli, et al. "Electrical impedance tomography methods for miniaturised 3D systems." Journal of Electrical Bioimpedance 7, no. 1 (2019): 59–67. http://dx.doi.org/10.5617/jeb.4084.

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Abstract In this study, we explore the potential of electrical impedance tomography (EIT) for miniaturised 3D samples to provide a non-invasive approach for future applications in tissue engineering and 3D cell culturing. We evaluated two different electrode configurations using an array of nine circular chambers (Ø 10 mm), each having eight gold plated needle electrodes vertically integrated along the chamber perimeter. As first method, the adjacent electrode configuration was tested solving the computationally simple back-projection algorithm using Comsol Multiphysics in time-difference EIT

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Zhu, Jiang, Yuichi Takekuma, Tomohisa Tanaka, and Yoshio Saito. "3D Model Registration Based on Feature Extraction." Advanced Materials Research 299-300 (July 2011): 1091–94. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1091.

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Currently, design and processing of complicated model are enabled by the progress of the CAD/CAM system. In shape measurement, high precision measurement is performed using CMM. In order to evaluate the machined part, the designed model made by CAD system the point cloud data provided by the measurement system are analyzed and compared. Usually, the designed CAD model and measured point cloud data are made in the different coordinate systems, it is necessary to register those models in the same coordinate system for evaluation. In this research, a 3D model registration method based on feature

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Conen, N., and T. Luhmann. "OVERVIEW OF PHOTOGRAMMETRIC MEASUREMENT TECHNIQUES IN MINIMALLY INVASIVE SURGERY USING ENDOSCOPES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W4 (May 10, 2017): 33–40. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w4-33-2017.

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This contribution provides an overview of various photogrammetric measurement techniques in minimally invasive surgery and presents a self-developed prototypical trinocular endoscope for reliable surface measurements. Most of the presented techniques focus on applications regarding laparoscopy, which mean endoscopic operations in the abdominal or pelvic cavities. Since endoscopic operations are very demanding to the surgeon, various assistant systems have been developed. Imaging systems may use photogrammetric techniques in order to perform 3D measurements during operation. The intra-operative

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Bösemann, Werner. "INDUSTRIAL PHOTOGRAMMETRY - ACCEPTED METROLOGY TOOL OR EXOTIC NICHE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (June 15, 2016): 15–24. http://dx.doi.org/10.5194/isprsarchives-xli-b5-15-2016.

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New production technologies like 3D printing and other adaptive manufacturing technologies have changed the industrial manufacturing process, often referred to as next industrial revolution or short industry 4.0. Such Cyber Physical Production Systems combine virtual and real world through digitization, model building process simulation and optimization. It is commonly understood that measurement technologies are the key to combine the real and virtual worlds (eg. [Schmitt 2014]). &lt;br&gt;&lt;br&gt; This change from measurement as a quality control tool to a fully integrated

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Szewczak, Ilona, and Katarzyna Rzeszut. "Modern measurement methods in strength tests of sigma thin-walled steel beams." E3S Web of Conferences 49 (2018): 00112. http://dx.doi.org/10.1051/e3sconf/20184900112.

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In the paper the modern measurement methods of structural deformation using GOM optical measuring systems based on digital image processing were presented. First part of the work demonstrates the results of measurement of initial geometrical imperfections of steel structural elements using the Tritop optical 3D coordinate measuring machine. The method of preparation of sigma type steel beams with a height of 200 mm, a flange width of 70 mm and a wall thickness of 2 mm is presented. Afterwards, the subsequent stages of measurements and the method of reading the obtained results and their interp

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Korkalo, Otto, and Tapio Takala. "Measurement Noise Model for Depth Camera-Based People Tracking." Sensors 21, no. 13 (2021): 4488. http://dx.doi.org/10.3390/s21134488.

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Depth cameras are widely used in people tracking applications. They typically suffer from significant range measurement noise, which causes uncertainty in the detections made of the people. The data fusion, state estimation and data association tasks require that the measurement uncertainty is modelled, especially in multi-sensor systems. Measurement noise models for different kinds of depth sensors have been proposed, however, the existing approaches require manual calibration procedures which can be impractical to conduct in real-life scenarios. In this paper, we present a new measurement no

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Todorovic, Aleksandar, and Vojkan Lazic. "Computer aided design and manufacturing of dental restorations - “computerized impression” technology." Serbian Dental Journal 53, no. 1 (2006): 42–53. http://dx.doi.org/10.2298/sgs0601042t.

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CAD/CAM technology (Computer Aided Design / Computer Aided Manufacturing) in the matter of fact helps in design and development of two-dimensional or three-dimensional models and their realization on numerical controlled machines. The key to direct or indirect CAD/CAM dental restorations is the measurement of dental preparation in the mouth or on the plaster die. The aim of this paper is to describe the possibilities and the way of function of different computer aided inspection (CAI) systems as a first part of CAD/CAM systems. Different researchers have presented several approaches of methods

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Enami, Kazuhiro. "Calibration Using Cylindrical Artifacts for 3D Laser Measurement System." International Journal of Automation Technology 9, no. 5 (2015): 546–50. http://dx.doi.org/10.20965/ijat.2015.p0546.

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We propose a new calibration method for 3D laser measurement systems used for inspecting the insides of industrial parts such as vessels and pipes. We developed the proposed calibration system using a cylindrical artifact such that the calibration is simple and easy to perform. We simulated and analyzed the proposed cylindrical artifact calibration method and the results demonstrate its adequacy.

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Hasegawa, Kazuhide, and Yukio Sato. "Endoscope system for high-speed 3D measurement." Systems and Computers in Japan 32, no. 8 (2001): 30–39. http://dx.doi.org/10.1002/scj.1046.

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Prokopchenko, Serhii, and Volodymyr Voskresenskyi. "3D VIDEO MEASURING SYSTEM FOR TESTING OF MANUFACTURE OF PARTS THE HIGH PRECISION PROCESSING." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 61(1) (June 30, 2021): 32–36. http://dx.doi.org/10.20535/1970.61(1).2021.237090.

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During the control of technological processes of manufacturing various parts, which are required to increase the accuracy of processing, it is necessary to adhere to the systematic measurement of their geometric dimensions, tolerances, compliance with the shape and location of the surfaces of the parts. To date, this type of non-destructive testing is carried out using special optical systems and allows you to study different products, regardless of their type, design features and structure of the materials from which they are made. That is, the visual-optical method of measurement is one of t

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Miklašēvičs, Ziedonis. "THE IMPACT OF HARVESTER CALIBRATION ON THE ACCURACY OF BIRCH VENEER LOGS MEASUREMENTS BY MEASURING DIAMETER IN SHORT INTERVALS USING ELECTRONIC 3D SYSTEMS." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 3 (June 15, 2017): 217. http://dx.doi.org/10.17770/etr2017vol3.2535.

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Accurate calibration of the harvester head relies on accurate manual log measurements. According to the recommended calibration procedures as proposed by the harvester manufacturer the differences between the volume measurements from harvester measurement system and the caliper-and-tape system must be within ± 3% and harvester diameter measurements within ± 6mm of manual measurements in 80% cases. Requirements in Latvia stipulate that total volume measurement accuracy levels must be within ± 5% of actual volume if veneer or birch logs are being harvested, ± 3% if saw logs are being harve

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Sun, Yi Bo, Xin Qi Zheng, Zong Ren Jia, and Gang Ai. "Design of Light-Small Mobile 3D Laser Measurement System." Applied Mechanics and Materials 405-408 (September 2013): 3032–36. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.3032.

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At present, most of the commercial 3D laser scanning measurement systems do work for a large area and a big scene, but few shows their advantage in the small area or small scene. In order to solve this shortage, we design a light-small mobile 3D laser scanning system, which integrates GPS, INS, laser scanner and digital camera and other sensors, to generate the Point Cloud data of the target through data filtering and fusion. This system can be mounted on airborne or terrestrial small mobile platform and enables to achieve the goal of getting Point Cloud data rapidly and reconstructing the rea

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Morimoto, Yoshiharu, Toru Matui, and Motoharu Fujigaki. "Application of Three-Dimensional Displacement and Strain Distribution Measurement by Windowed Phase-Shifting Digital Holographic Interferometry." Advanced Materials Research 47-50 (June 2008): 1262–65. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1262.

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In order to measure 3D displacement components and surface strain distributions of objects, three systems for digital holographic interferometry were developed. In this study, these three systems are introduced and the applications to measurement of 3D displacement components and surface strain distributions of cantilevers are shown.

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Bräuer-Burchardt, Christian, Christoph Munkelt, Ingo Gebhart, et al. "A-Priori Calibration of a Structured Light Underwater 3D Sensor." Journal of Marine Science and Engineering 8, no. 9 (2020): 635. http://dx.doi.org/10.3390/jmse8090635.

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In this study, we introduce a new calibration method for underwater optical stereo scanners. It uses air calibration, additional underwater parameters, and extended camera modeling. The new methodology can be applied to both passive photogrammetric and structured light three-dimensional (3D) scanning systems. The novel camera model uses a variable principal distance depending on the radial distance to the principal point instead of two-dimensional distortion functions. This allows for an initial improvement of 3D reconstruction quality. In a second step, certain underwater-specific parameters—

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Kay, N. J., N. L. Oo, P. J. Richards, and R. N. Sharma. "Characteristics of fluctuating pressure measurement systems utilising lengths of 3D-Printed tubing." Journal of Wind Engineering and Industrial Aerodynamics 199 (April 2020): 104121. http://dx.doi.org/10.1016/j.jweia.2020.104121.

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Serigos, Pedro A., Jorge A. Prozzi, Andre de Fortier Smit, and Michael R. Murphy. "Evaluation of 3D Automated Systems for the Measurement of Pavement Surface Cracking." Journal of Transportation Engineering 142, no. 6 (2016): 05016003. http://dx.doi.org/10.1061/(asce)te.1943-5436.0000841.

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Ferrater, Marta, Anna Echeverria, Eulàlia Masana, José J. Martínez-Díaz, and Warren D. Sharp. "A 3D measurement of the offset in paleoseismological studies." Computers & Geosciences 90 (May 2016): 156–63. http://dx.doi.org/10.1016/j.cageo.2016.02.024.

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Ko, Seong-Young, Won-Chul Bang, and Sang-Youn Kim. "A Measurement System for 3D Hand-Drawn Gesture with a PHANToMTMDevice." Journal of Information Processing Systems 6, no. 3 (2010): 347–58. http://dx.doi.org/10.3745/jips.2010.6.3.347.

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Sun, Guoxiang, Xiaochan Wang, Ye Sun, Yongqian Ding, and Wei Lu. "Measurement Method Based on Multispectral Three-Dimensional Imaging for the Chlorophyll Contents of Greenhouse Tomato Plants." Sensors 19, no. 15 (2019): 3345. http://dx.doi.org/10.3390/s19153345.

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Nondestructive plant growth measurement is essential for researching plant growth and health. A nondestructive measurement system to retrieve plant information includes the measurement of morphological and physiological information, but most systems use two independent measurement systems for the two types of characteristics. In this study, a highly integrated, multispectral, three-dimensional (3D) nondestructive measurement system for greenhouse tomato plants was designed. The system used a Kinect sensor, an SOC710 hyperspectral imager, an electric rotary table, and other components. A hetero

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Yao, Li Li, Hai Bo Shi, Chang Liu, and Zhong Hua Han. "Solving the Two-Objective Shop Scheduling Problem in MTO Manufacturing Systems by a Novel Genetic Algorithm." Advanced Materials Research 314-316 (August 2011): 1315–20. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1315.

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With the characteristics of un-touching, high-automatic and high-speed, we measured 3D shape by digital moiré patterns. And it can measure 3D shape without compensator, auxiliary mirror, hologram and other assistant modules. So it is widely used in measurement of 3D shape. But with the negative effect of grating area and CCD resolution of the camera, it has some problems in large aperture, steep aspheric surface, even off-axis aspheric testing. Focus on these problems; this paper established a sub-region splicing measurement of aspheric surface by using the combination of digital moire pattern

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Sato, Osamu, Hiroyuki Fujimoto, Sonko Osawa, Makoto Abe, and Toshiyuki Takatsuji. "Simple Interim Check of Measuring Performance for X-Ray Computed Tomography Used as Coordinate Measuring System." International Journal of Automation Technology 9, no. 5 (2015): 525–29. http://dx.doi.org/10.20965/ijat.2015.p0525.

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Form and dimension measurements using X-ray computed tomography (X-ray CT) are useful in product development, reverse engineering, production control and quality certification. This is because X-ray CT systems can get three-dimensional 3D volumetric data on the full body of the target object all at once. The measurement space of 3D coordinate measuring systems (CMSs), which include X-ray CTs, are distorted by kinematic and other factors. This means that measurement space deformation should be compensated for precise dimensional measurement. The compensation function should also be occasionally

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Yarmohammadi, Saman, and Daniel Castro-Lacouture. "Automated performance measurement for 3D building modeling decisions." Automation in Construction 93 (September 2018): 91–111. http://dx.doi.org/10.1016/j.autcon.2018.05.011.

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Kersten, T. P., M. Lindstaedt, and D. Starosta. "COMPARATIVE GEOMETRICAL ACCURACY INVESTIGATIONS OF HAND-HELD 3D SCANNING SYSTEMS – AN UPDATE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2 (May 30, 2018): 487–94. http://dx.doi.org/10.5194/isprs-archives-xlii-2-487-2018.

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Hand-held 3D scanning systems are increasingly available on the market from several system manufacturers. These systems are deployed for 3D recording of objects with different size in diverse applications, such as industrial reverse engineering, and documentation of museum exhibits etc. Typical measurement distances range from 0.5&amp;thinsp;m to 4.5&amp;thinsp;m. Although they are often easy-to-use, the geometric performance of these systems, especially the precision and accuracy, are not well known to many users. First geometrical investigations of a variety of diverse hand-held 3D s

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Schmitt, R., G. Mallmann, P. Ackermann, J. P. Bergmann, M. Stambke, and K. Schricker. "3D-Charakterisierung von Hybridbauteilen durch OCT*/3D OCT characterization of hybrid components." wt Werkstattstechnik online 105, no. 11-12 (2015): 764–69. http://dx.doi.org/10.37544/1436-4980-2015-11-12-4.

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Der Fachbeitrag beschreibt eine neue Methode zur Prüfung und Qualitätssicherung von hybriden Metall-Kunststoff-Verbunden – hergestellt durch laserbasiertes thermisches Fügen – unter Verwendung der optischen Kohärenztomographie (OCT). Dieser Ansatz erlaubt die Messung der Fügenaht sowie ihrer benetzten Anbindungsfläche einschließlich des Erkennens von Blasen, Fehlstellen und Schmelzeaustrieb. &nbsp; This article presents a novel method for process monitoring and quality assurance of laser-based thermal joining of metal-plastic hybrids based on optical coherence tomography. This approach ena

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YANG, XIAO-SONG. "ON OBSERVABILITY OF 3D CONTINUOUS-TIME AUTONOMOUS CHAOTIC SYSTEMS BASED ON SCALAR OUTPUT MEASUREMENT." International Journal of Bifurcation and Chaos 12, no. 05 (2002): 1159–62. http://dx.doi.org/10.1142/s0218127402005005.

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In this paper, by means of case studies we discuss an observable feature of 3D continuous-time autonomous chaotic systems through scalar output and its time derivatives. We observe that the Lorenz system, the Rössler system, the Chua circuit and the Chen system are all observable based on scalar output and its derivatives. This leads to our conjecture that chaotic motion described by 3D continuous-time autonomous dynamical system is observable based on a scalar output and its first- and second-order derivatives. Finally, we present some mathematical analysis and put up some theoretical questio

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Fornaser, Alberto, Luca Maule, Alessandro Luchetti, Paolo Bosetti, and Mariolino De Cecco. "Self-Weighted Multilateration for Indoor Positioning Systems." Sensors 19, no. 4 (2019): 872. http://dx.doi.org/10.3390/s19040872.

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The paper proposes an improved method for calculating the position of a movable tag whose distance to a (redundant) set of fixed beacons is measured by some suitable physical principle (typically ultra wide band or ultrasound propagation). The method is based on the multilateration technique, where the contribution of each individual beacon is weighed on the basis of a recurring, self-supported calibration of the measurement repeatability of each beacon at a given distance range. The work outlines the method and its implementation, and shows the improvement in measurement quality with respect

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Huang, Yu-Jui, Yi-Cheng Huang, Siang-Cyun Wang, and Ming-Chou Ku. "Computed Tomography System for Total Knee Replacement Planning and Comparison with Plain Radiography Measured by an Orthopedic Surgeon." Journal of Imaging Science and Technology 63, no. 5 (2019): 50503–1. http://dx.doi.org/10.2352/j.imagingsci.technol.2019.63.5.050503.

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Abstract In this study, a new CT measurement system was developed for preoperation evaluation of total knee replacement (TKR). To validate the developed imaging processing systems, TKR patients with and without a bowed lower limb were recruited. All patients underwent plain radiographs and CT scan before a TKR procedure. The precision and effectiveness of two measurements validated by an orthopedic surgeon and evaluated using the developed 3D computed tomography image system were compared. In vivo statistics data, particularly for Taiwanese patients, showed no difference between bowed lower li

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Zhu, Yuan Feng, Li Zhang, and Ke Tian Li. "3D Electronic Products Surface Measurement System Based on Machine Vision." Key Engineering Materials 579-580 (September 2013): 630–36. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.630.

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Adopting high-speed line scan industrial camera, through window function of the software to capture interested areas scanning by linear structured light, through image processing algorithms and splicing technique to extract 3D feature information of the detected object surface, combined with the camera calibration technology, calculated the three-dimensional coordinates of the detected object, and real-time displayed intuitive pseudo color map, monitored picture signal and weeded out unqualified products. Compared with similar systems at home and abroad, the system are real-time pseudo color g

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Vilaça, João L., Jaime C. Fonseca, and António M. Pinho. "Calibration procedure for 3D measurement systems using two cameras and a laser line." Optics & Laser Technology 41, no. 2 (2009): 112–19. http://dx.doi.org/10.1016/j.optlastec.2008.05.012.

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Lei, Z., H. T. Kang, and G. Reyes. "Full Field Strain Measurement of Resistant Spot Welds Using 3D Image Correlation Systems." Experimental Mechanics 50, no. 1 (2008): 111–16. http://dx.doi.org/10.1007/s11340-008-9186-5.

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Yang, Tao, Guanliang Zhang, Huanhuan Li, and Xiang Zhou. "Hybrid 3D Shape Measurement Using the MEMS Scanning Micromirror." Micromachines 10, no. 1 (2019): 47. http://dx.doi.org/10.3390/mi10010047.

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A surface with large reflection variations represents one of the biggest challenges for optical 3D shape measurement. In this work, we propose an alternative hybrid 3D shape measurement approach, which combines the high accuracy of fringe projection profilometry (FPP) with the robustness of laser stripe scanning (LSS). To integrate these two technologies into one system, first, we developed a biaxial Microelectromechanical Systems (MEMS) scanning micromirror projection system. In this system, a shaped laser beam serves as a light source. The MEMS micromirror projects the laser beam onto the ob

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Xiong, J., S. Zhong, and L. Zheng. "AN AUTOMATIC 3D RECONSTRUCTION METHOD BASED ON MULTI-VIEW STEREO VISION FOR THE MOGAO GROTTOES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-4/W5 (May 11, 2015): 171–76. http://dx.doi.org/10.5194/isprsarchives-xl-4-w5-171-2015.

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This paper presents an automatic three-dimensional reconstruction method based on multi-view stereo vision for the Mogao Grottoes. 3D digitization technique has been used in cultural heritage conservation and replication over the past decade, especially the methods based on binocular stereo vision. However, mismatched points are inevitable in traditional binocular stereo matching due to repeatable or similar features of binocular images. In order to reduce the probability of mismatching greatly and improve the measure precision, a portable four-camera photographic measurement system is used fo

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Rymarczyk, Tomasz, Edward Kozłowski, and Grzegorz Kłosowski. "Electrical impedance tomography in 3D flood embankments testing – elastic net approach." Transactions of the Institute of Measurement and Control 42, no. 4 (2019): 680–90. http://dx.doi.org/10.1177/0142331219857374.

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The article presents non-destructive testing based on electrical impedance tomography (EIT) for spatial (3D) monitoring of flood embankments. Therefore, to solve the inverse problem of the EIT, an effective algorithm based on multiple elastic nets has been developed. The originality of the solution is based on the application of many elastic net algorithms as functions, each of which, based on the vector of all measurements, generates the value of a single pixel for the reconstructed image. In this way, the set of elastic nets is equal to the resolution of the image output. Such an approach, a

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Lahmann, H. W., S. Schmalzried, G. Ketterer, D. Weber, F. Welzel, and D. Jeyaraj. "A FLEXIBLE AND ROBUST 3D COORDINATE MEASUREMENT SYSTEM BASED ON WHITE LIGHT INTERFEROMETRY FOR DEVIATION MEASUREMENTS ON SWISS-TYPE TURNING MACHINES." MM Science Journal 2021, no. 3 (2021): 4591–96. http://dx.doi.org/10.17973/mmsj.2021_7_2021064.

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The calibration of machine tools or industrial robots needs high precision 3-dimensional coordinate measurements. Common available systems still have the need of ambitious and time extensive processes to fulfill the requested requirements. Therefore there is a strong request for fully automated systems that allow an autonomous and easy to handle procedure for 3D volumetric deviation measurements. This exactly is the intension of the here presented 3D Coordinate Measurement System. The so called µ-GPS System is based on reliable white light interferometer and robust technology. The 3D coordinat

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Terabayashi, Kenji, Toru Morita, Hiroya Okamoto, and Kazunori Umeda. "3D Measurement Using a Fish-Eye Camera Based on EPI Analysis." Journal of Robotics and Mechatronics 24, no. 4 (2012): 677–85. http://dx.doi.org/10.20965/jrm.2012.p0677.

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In car driving support systems and mobile robots, it is important to understand three-dimensional environment widely at once. In this paper, we use a fish-eye camera as a sensor to measure three-dimensional (3D) environments. This camera can take a wide-range and distortional image and can be easily mounted on cars. We propose a method for reconstructing 3D environment using fish-eye images based on Epipolar-Plane Image (EPI) analysis. This method enables easy and stable matching of feature points. The effectiveness of the proposed method is verified by experiments.

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Xiao, Zhen Zhong, Jin Liang, De Hong Yu, and Zheng Zong Tang. "An Improved Calibration Method for Optical 3D Measuring System Using Cross Target Based on Bundle Adjustment Algorithm." Advanced Materials Research 97-101 (March 2010): 4237–42. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4237.

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This paper presents an accurate calibration method of binocular 3D measurement systems for industrial on-site inspection, which uses a cross target with ring coded points. The cross target can be used to calibrate large-scale field-of-view stereo measurement systems and obtain higher measurement precision conveniently. The world coordinates of these ring coded points are not required. The calibration initial value is computed by using the relative orientation method and the Direct Linear Transform (DLT) method of photogrammetry. The bundle adjustment algorithm is used to optimize the calibrati

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Molnár, Viktor. "Minimization Method for 3D Surface Roughness Evaluation Area." Machines 9, no. 9 (2021): 192. http://dx.doi.org/10.3390/machines9090192.

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3D surface roughness measurement is still a less mature procedure than its 2D version. The size of the evaluation area is not as standardized as the measurement length in the 2D version. The purpose of this study is to introduce a method for minimizing the evaluated surface area. This could help industrial applications in minimizing the time and cost of measurements. Machining experiments (hard turning and infeed grinding) and surface roughness measurements were carried out for automotive industrial parts to demonstrate the introduced method. Some frequently used roughness parameters were anal

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Balta, Haris, Jasmin Velagic, Halil Beglerovic, Geert De Cubber, and Bruno Siciliano. "3D Registration and Integrated Segmentation Framework for Heterogeneous Unmanned Robotic Systems." Remote Sensing 12, no. 10 (2020): 1608. http://dx.doi.org/10.3390/rs12101608.

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The paper proposes a novel framework for registering and segmenting 3D point clouds of large-scale natural terrain and complex environments coming from a multisensor heterogeneous robotics system, consisting of unmanned aerial and ground vehicles. This framework involves data acquisition and pre-processing, 3D heterogeneous registration and integrated multi-sensor based segmentation modules. The first module provides robust and accurate homogeneous registrations of 3D environmental models based on sensors’ measurements acquired from the ground (UGV) and aerial (UAV) robots. For 3D UGV registra

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