The principle of 3D measurement on structure light and color-encoded method

2005 ◽  
Author(s):  
Huijuan Yuan ◽  
Xiaoyang Yu ◽  
Jianying Guo ◽  
Baoguo Zhou ◽  
Chunhong Zou
Keyword(s):  
3D Measurement ◽  
Structure Light

A novel composite-structure-light 3D measurement method for improving accuracy based on two plus one phase shifting algorithm

Optik ◽  
2013 ◽  
Vol 124 (5) ◽  
pp. 461-465 ◽  
Author(s):  
Ai-ping Zhai ◽  
Yi-ping Cao ◽  
Zhen-fen Huang ◽  
Yu-hang He ◽  
Ming-teng Lu
Keyword(s):  
Composite Structure ◽  
Measurement Method ◽  
Phase Shifting ◽  
3D Measurement ◽  
Improving Accuracy ◽  
Structure Light

3D Measurement with Orthogonal Composite Structure Light Based on Two-Plus-One Phase-Shifting Algorithm

2012 ◽  
Vol 39 (2) ◽  
pp. 0208003
Author(s):  
翟爱平 Zhai Aiping ◽  
曹益平 Cao Yiping ◽  
何宇航 He Yuhang
Keyword(s):  
Composite Structure ◽  
Phase Shifting ◽  
3D Measurement ◽  
Structure Light

Calibrate Method for Scanning Direction of 3D Measurement System Based on Linear-Structure Light

2012 ◽  
Vol 39 (1) ◽  
pp. 0108002
Author(s):  
曾祥军 Zeng Xiangjun ◽  
霍金城 Huo Jincheng ◽  
吴庆阳 Wu Qingyang
Keyword(s):  
Measurement System ◽  
Linear Structure ◽  
3D Measurement ◽  
Scanning Direction ◽  
3D Measurement System ◽  
Structure Light

scholarly journals Research on 3D measurement model by line structure light vision

2018 ◽  
Vol 2018 (1) ◽  
Author(s):  
Siyuan Liu ◽  
Yachao Zhang ◽  
Yunhui Zhang ◽  
Tianchi Shao ◽  
Minqiao Yuan
Keyword(s):  
Measurement Model ◽  
3D Measurement ◽  
Line Structure ◽  
Structure Light

scholarly journals A Single-Shot, Pixel Encoded 3D Measurement Technique for Structure Light

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 127254-127271
Author(s):  
Ahsan Elahi ◽  
Jun Lu ◽  
Qi-Dan Zhu ◽  
Li Yong
Keyword(s):  
Measurement Technique ◽  
Single Shot ◽  
3D Measurement ◽  
Structure Light

Counterfeit Parts Recognition and Detection for Failure Analysts

2010 ◽  
Author(s):  
Katherine V. Whittington
Keyword(s):  
Thermal Cycle ◽  
Visual Inspection ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
3D Measurement ◽  
X Ray ◽  
Wide Range ◽  
Electronic Parts ◽  
Testing Awareness

Abstract The electronics supply chain is being increasingly infiltrated by non-authentic, counterfeit electronic parts, whose use poses a great risk to the integrity and quality of critical hardware. There is a wide range of counterfeit parts such as leads and body molds. The failure analyst has many tools that can be used to investigate counterfeit parts. The key is to follow an investigative path that makes sense for each scenario. External visual inspection is called for whenever the source of supply is questionable. Other methods include use of solvents, 3D measurement, X-ray fluorescence, C-mode scanning acoustic microscopy, thermal cycle testing, burn-in technique, and electrical testing. Awareness, vigilance, and effective investigations are the best defense against the threat of counterfeit parts.

Automated 3D measurement of fiber cross section morphology in handsheets

2012 ◽  
Vol 27 (2) ◽  
pp. 264-269 ◽  
Author(s):  
Christian Lorbach ◽  
Ulrich Hirn ◽  
Johannes Kritzinger ◽  
Wolfgang Bauer
Keyword(s):  
Image Analysis ◽  
Cross Section ◽  
Cross Sections ◽  
Image Plane ◽  
3D Measurement ◽  
Cross Sectional ◽  
Fiber Cross Section ◽  
Fiber Wall ◽  
Sectional Shape ◽  
Cross Section Geometry

Abstract We present a method for 3D measurement of fiber cross sectional morphology from handsheets. An automated procedure is used to acquire 3D datasets of fiber cross sectional images using an automated microtome and light microscopy. The fiber cross section geometry is extracted using digital image analysis. Simple sample preparation and highly automated image acquisition and image analysis are providing an efficient tool to analyze large samples. It is demonstrated that if fibers are tilted towards the image plane the images of fiber cross sections are always larger than the true fiber cross section geometry. In our analysis the tilting angles of the fibers to the image plane are measured. The resulting fiber cross sectional images are distorted to compensate the error due to fiber tilt, restoring the true fiber cross sectional shape. We use an approximated correction, the paper provides error estimates of the approximation. Measurement results for fiber wall thickness, fiber coarseness and fiber collapse are presented for one hardwood and one softwood pulp.

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