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Stereo Matching and 3D Visualization for Gamma-Ray Cargo Inspection

Zhigang Zhu, Yu-chi Hu
2007 2007 IEEE Workshop on Applications of Computer Vision (WACV '07)  
A fast and automated stereo matching algorithm based on free-form deformable registration is developed to obtain 3D measurements of the objects under inspection.  ...  For fast implementation, a multi-resolution approach is also applied. A user interface is designed for interactive 3D measurements and visualization of the objects in interests.  ...  By doing this we will obtain much important information that was not available, e.g. the real parameters of the sensor setting, the ground truth data of the objects under inspection for fully evaluating  ... 
doi:10.1109/wacv.2007.57 dblp:conf/wacv/ZhuH07 fatcat:ymrxv73b2vcihjf323yk4b2hke

Robust generalized numerical inspection fixture for the metrology of compliant mechanical parts

Hassan Radvar-Esfahlan, Souheil-Antoine Tahan
2013 The International Journal of Advanced Manufacturing Technology  
The other advantage of presented method is the capacity to inspect the parts with large deformations.  ...  These parts have different shapes in free state due to dimensional and geometric variations, gravity and residual strains.  ...  Also, we appreciate the authors of different codes in NLDR and GMDS methods.  ... 
doi:10.1007/s00170-013-5344-8 fatcat:ttw5lizg4rcopm7dgpzmxndup4

Simple versatile shearing interferometer suitable for measurements on a microscopic scale

Emilia Mihaylova, Vincent Toal
2009 Optics and lasers in engineering  
ABSTRACT Microelectromechanical systems (MEMS) behave differently from massive samples. Conventional testing and inspection techniques usually fail at the microscale.  ...  The shearing device consists of two partially reflective glass plates. The reflection coefficients of the coatings are 0.3 and 0.7 respectively.  ...  INTRODUCTION Developments in the field of semiconductors are leading to integrated circuits with three-dimensional features and moving parts, called micro-electromechanical systems (MEMS).  ... 
doi:10.1016/j.optlaseng.2008.05.003 fatcat:j3q5nfi4nfguvfqturvhxobf3m

Gamma/x-ray linear pushbroom stereo for 3D cargo inspection

Zhigang Zhu, Yu-Chi Hu, George Vourvopoulos, F. Patrick Doty
2006 Non-Intrusive Inspection Technologies  
Then, a fast and automated stereo matching algorithm based on free-form deformable registration is developed to obtain 3D measurements of the objects under inspection.  ...  For evaluating the contents of trucks, containers, cargo, and passenger vehicles by a non-intrusive gamma-ray or X-ray imaging system to determine the possible presence of contraband, three-dimensional  ...  ACKNOWLEDGEMENTS This work is partially supported by the Air Force Research Laboratory (AFRL) under the RASER Program (Award No. FA8650-05-1-1853) and an Human Effectiveness Program (Award No.  ... 
doi:10.1117/12.664204 fatcat:fl2x76mud5atrdmhzzy7ynntea

Gamma/X-ray linear pushbroom stereo for 3D cargo inspection

Zhigang Zhu, Yu-Chi Hu, Li Zhao
2008 Machine Vision and Applications  
Then, a fast stereo matching algorithm is developed to obtain 3D measurements of the objects under inspection. This algorithm is fully automatic based on free-form deformable registration.  ...  For evaluating the contents of trucks, containers, cargo, and passenger vehicles by a nonintrusive gamma-ray or X-ray imaging system to determine the possible presence of contraband, three-dimensional  ...  the early stage of the work.  ... 
doi:10.1007/s00138-008-0173-8 fatcat:av4sbvzvtjahhhdwef2tz755wi

X-Ray Microcomputed Tomography in Additive Manufacturing: A Review of the Current Technology and Applications

Anton du Plessis, Igor Yadroitsev, Ina Yadroitsava, Stephan G. Le Roux
2018 3D Printing and Additive Manufacturing  
X-ray microcomputed tomography (microCT) has become an established method of testing and analyzing additively manufactured parts in recent years, being especially useful and accurate for dimensional measurement  ...  The review ends with perspectives on the most time-and cost-effective ways to make use of microCT for various AM applications from R&D up to industrial production, with suggestions for scan strategies  ...  This can be done by simple viewing of CT slice images from a reasonably fast microCT scan, such as the example shown in Figure 1 , where powder remains inside the part and is visible in the CT image as  ... 
doi:10.1089/3dp.2018.0060 fatcat:ydzuxi37rfgl5pzyflqtqtldne

Laser-Ultrasonics for Industrial Applications [chapter]

Jean-Pierre Monchalin, Jean-Daniel Aussel, Paul Bouchard, René Héon
1988 Review of Progress in Quantitative Nondestructive Evaluation  
ACKNOWLEDGEMENT Work supported in part by CANMET, Energy, Mines and Resources, Canada.  ...  from a C-scan view only.  ...  The first pulse observed in Fig. 2 comprises a fast positive-going part, which corresponds to stray light from the generating/cleaning laser picked up by the detector, followed by the signal produced  ... 
doi:10.1007/978-1-4613-0979-6_88 fatcat:mbx4cyia5rahhks6r7bwmdqlem

Towards Retrieving Force Feedback in Robotic-Assisted Surgery: A Supervised Neuro-Recurrent-Vision Approach

Angelica I. Aviles, Samar M. Alsaleh, James K. Hahn, Alicia Casals
2017 IEEE Transactions on Haptics  
The proposed solution starts with extracting the geometry of motion of the heart's surface by minimizing an energy functional to recover its 3D deformable structure.  ...  Nonetheless, they still suffer from some limitations that affect their outcome.  ...  The work has been developed in the frame of Project RTC-2015-3926-1, from MINECO and with Feder funds.  ... 
doi:10.1109/toh.2016.2640289 pmid:28113330 fatcat:hntibrfgwjezjnzb3izk6yjqne

Deformation Analysis of a Composite Bridge during Proof Loading Using Point Cloud Processing

Patryk Ziolkowski, Jakub Szulwic, Mikolaj Miskiewicz
2018 Sensors  
These techniques allow the creation of three-dimensional projections of the measured objects, and are relatively easy to use.  ...  The results are characterized by a high degree of convergence and reveal the highly complex state of deformation more clearly than can be concluded from other measurement methods, proving that laser scanning  ...  Both departments are a part of Faculty of Civil and Environmental Engineering, at the Gdansk University of Technology. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s18124332 fatcat:oqxq7xzgozf4tbnwf5hrf7mcye

Comparative exploration of whole-body MR through locally rigid transforms

Oleh Dzyubachyk, Jorik Blaas, Charl P. Botha, Marius Staring, Monique Reijnierse, Johan L. Bloem, Rob J. van der Geest, Boudewijn P. F. Lelieveldt
2013 International Journal of Computer Assisted Radiology and Surgery  
Our method is based on interactive derivation of locally rigid transforms from a pre-computed whole-body deformable registration.  ...  of the STW project 10894 "Image analysis for whole-body MR imaging". facilitate the visual comparison of the two datasets: the "deformation sphere", the color fusion view, the magic lens, and a set of  ...  The middle view shows a fusion of both images, to further ease the comparison (see "Color fusion view"). Each view shows a two-dimensional slice through the three-dimensional volume.  ... 
doi:10.1007/s11548-013-0820-z pmid:23729332 pmcid:PMC3702961 fatcat:rirq3tgrovbyxj4teuwqyhwjhy

Head-mounted display for interactive inspection of painted free-form surfaces

Soeren Kammel, Fernando Puente Leon, Clarence E. Rash, Colin E. Reese
2003 Helmet- and Head-Mounted Displays VIII: Technologies and Applications  
The system performance is demonstrated with the visual inspection of car doors.  ...  Promising results show that our prototype allows a reliable yet cost-efficient inspection of painted surfaces matching the needs of automotive industry.  ...  Michael Heizmann for valuable comments on a draft version of this paper.  ... 
doi:10.1117/12.484798 fatcat:ykwbjgcd4fajzf57kjrnzrtxui

Review and comparison of shearography and active thermography for nondestructive evaluation

Y.Y. Hung, Y.S. Chen, S.P. Ng, L. Liu, Y.H. Huang, B.L. Luk, R.W.L. Ip, C.M.L. Wu, P.S. Chung
2009 Materials science & engineering. R, Reports  
For the convenience of the materials community, this paper aims to present a comprehensive review of shearography and active thermography and their applications in nondestructive evaluation of materials  ...  A comparison of the advantages and limitations of two techniques for nondestructive evaluation will also be presented.  ...  Acknowledgement The work described in this paper has been supported by the grants CityU 1/01C and CityU 1196/02E of the Research Grants Council of Hong Kong, China.  ... 
doi:10.1016/j.mser.2008.11.001 fatcat:tiws4pprtvfenoxklms7janc6i

Four-dimensional in vivo X-ray microscopy with projection-guided gating

Rajmund Mokso, Daniel A. Schwyn, Simon M. Walker, Michael Doube, Martina Wicklein, Tonya Müller, Marco Stampanoni, Graham K. Taylor, Holger G. Krapp
2015 Scientific Reports  
Acknowledgments The research leading to these results has received funding from the  ...  Visual inspection of the tomographic data revealed streaking artefacts in all of the data obtained from single and multiple fast scans ( Supplementary Fig. 2a-d) .  ...  We retrieved the spatial distribution of the refractive indices of the tissues from the recorded phase deviation of the partially coherent synchrotron X-rays in the sample 18 .  ... 
doi:10.1038/srep08727 pmid:25762080 pmcid:PMC4356984 fatcat:lcbxswlqq5bz7pldkwjshdt5ou

E-quality Control in Dental Metal Additive Manufacturing Inspection Using 3D Scanning and 3D Measurement

Liang Du, Yiwen Lai, Chunwang Luo, Yong Zhang, Jun Zheng, Xiaohong Ge, Yuangang Liu
2020 Frontiers in Bioengineering and Biotechnology  
The main quality control challenge of these dental metal is the method of quality inspection.  ...  Here, we propose a combination of 3D scanning and 3D measurement for 3D inspection of metal crowns.  ...  This paper presents a 3D E-quality control system that integrates 3D scanning and 3D reconstruction to perform fast quality control inspections of complex dental metal parts.  ... 
doi:10.3389/fbioe.2020.01038 pmid:32984294 pmcid:PMC7481334 fatcat:bi643yq5dfd6jb6sf4jtjdfjoa


A. Costa-Jover, S. Coll-Pla, J. Queral Llaberia, D. Moreno García, A. Gas Llatge
2019 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The paper proposes a simple, non-invasive methodology for the assessment of masonry vaults from point clouds which makes it possible to obtain relevant data about the formal anomalies.  ...  The methodology is tested in Tortosa's Gothic Cathedral's vaults, where the geometrical differences between vaults, a priori equal, are identified and related with the partially known construction phases  ...  Table 1 . 1 Dimensional values of the standard primitives.  ... 
doi:10.5194/isprs-archives-xlii-2-w9-283-2019 fatcat:yqhcjwce6nglrcg5bh6tj5od6u
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