Research introduction of 3D measurement technology based on grating projection

2021 ◽  
Author(s):  
Rongzhuo Zhang ◽  
Ke Liu
Keyword(s):  
Measurement Technology ◽  
3D Measurement

scholarly journals 3D Measurement Technology by Structured Light Using Stripe-Edge-Based Gray Code

2006 ◽  
Vol 48 ◽  
pp. 537-541 ◽  
Author(s):  
H B Wu ◽  
Y Chen ◽  
M Y Wu ◽  
C R Guan ◽  
X Y Yu
Keyword(s):  
Structured Light ◽  
Gray Code ◽  
Measurement Technology ◽  
3D Measurement ◽  
Edge Based

Precision Comparison of 3D Measurement System Based on Stereo Vision

2012 ◽  
Vol 542-543 ◽  
pp. 635-638
Author(s):  
Ke Zhang ◽  
Zhao Gao
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Quality Control ◽  
Stereo Vision ◽  
Measurement System ◽  
Bp Neural Network ◽  
Robot Vision ◽  
Measurement Technology ◽  
3D Measurement ◽  
3D Measurement System

The 3D measurement based on stereo vision, as a new measurement technology, has been widely used in reverse engineering, robot vision and quality control, etc. In this paper, the basic principle and method of calibrating 3D measurement system based on stereo vision respectively using genetic algorithm and neural network was introduced. Then the measurement system was calibrated and the precision of 3D measurement system was compared. The experimental results indicate that the method based on BP neural network can improve the precision of measurement better.

scholarly journals Multiple Laser Stripe Scanning Profilometry Based on Microelectromechanical Systems Scanning Mirror Projection

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 57 ◽  
Author(s):  
Gailing Hu ◽  
Xiang Zhou ◽  
Guanliang Zhang ◽  
Chunwei Zhang ◽  
Dong Li ◽  
...  
Keyword(s):  
Microelectromechanical Systems ◽  
Speckle Noise ◽  
Measurement Technology ◽  
3D Measurement ◽  
High Quality ◽  
Full Field ◽  
Scanning Mirror ◽  
Laser Stripe ◽  
Measurement Efficiency ◽  
Mechanical Movement

In traditional laser-based 3D measurement technology, the width of the laser stripe is uncontrollable and uneven. In addition, speckle noise in the image and the noise caused by mechanical movement may reduce the accuracy of the scanning results. This work proposes a new multiple laser stripe scanning profilometry (MLSSP) based on microelectromechanical systems (MEMS) scanning mirror which can project high quality movable laser stripe. It can implement full-field scanning in a short time and does not need to move the measured object or camera. Compared with the traditional laser stripe, the brightness, width and position of the new multiple laser stripes projected by MEMS scanning mirror can be controlled by programming. In addition, the new laser strip can generate high-quality images and the noise caused by mechanical movement is completely eliminated. The experimental results show that the speckle noise is less and the light intensity distribution is more even. Furthermore, the number of pictures needed to be captured is significantly reduced to 1 / N ( N is the number of multiple laser stripes projected by MEMS scanning mirror) and the measurement efficiency is increased by N times, improving the efficiency and accuracy of 3D measurement.

Line structured light 3D measurement technology for pipeline microscratches based on telecentric lens

2021 ◽  
Vol 60 (12) ◽  
Author(s):  
Zhenjie Wang ◽  
Shaoli Liu ◽  
Jia Hu ◽  
Wenxiong Zhang ◽  
Hao Huang ◽  
...  
Keyword(s):  
Structured Light ◽  
Measurement Technology ◽  
3D Measurement ◽  
Telecentric Lens

1P1-G07 Development of 3D-measurement technology with fiber scope images(IBARAKI Robot Technology)

2013 ◽  
Vol 2013 (0) ◽  
pp. _1P1-G07_1-_1P1-G07_2
Author(s):  
Yu KAMIJI ◽  
Naoki AKAI ◽  
Koichi OZAKI ◽  
Chikara ITO ◽  
Ryutaro HINO
Keyword(s):  
Measurement Technology ◽  
3D Measurement ◽  
Robot Technology
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