Filtering and reduction for 3-dimensional surface modeling of laser line scanning point cloud

2018 ◽  
Author(s):  
Meng Yuan ◽  
Xiaorong Gao ◽  
Jie Guo ◽  
Jinlong Li
Keyword(s):  
Point Cloud ◽  
Surface Modeling ◽  
Laser Line ◽  
3 Dimensional ◽  
Line Scanning ◽  
Dimensional Surface

The influence of surface topology on the quality of the point cloud data acquired with laser line scanning probe

Sensor Review ◽  
2014 ◽  
Vol 34 (3) ◽  
pp. 255-265 ◽  
Author(s):  
Syed Hammad Mian ◽  
Mohammed Abdul Mannan ◽  
Abdulrahman M. Al-Ahmari
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
Specular Reflection ◽  
Surface Characteristics ◽  
Laser Line ◽  
Scanning Probe ◽  
Surface Topology ◽  
Polished Surface ◽  
Content Type ◽  
Line Scanning

Purpose – The purpose of this paper is to investigate the influence of surface topology on the performance of laser line scanning probe and to suggest methodology for 3D digitization of specular surfaces. Design/methodology/approach – Two different molds, one having milled surface and the other with polished surface, were used to identify effect of surface characteristics on the performance of laser line scanning probe mounted on bridge-type coordinate measuring machine. The point cloud data acquisition of two surfaces was carried out using different combinations of laser scanning parameters. The point cloud sets thus obtained were analyzed in terms of completeness, noise and accuracy. The polished mold which exhibited specular reflection was digitized at different scanning angles of laser line scanning probe using the best combination of scanning parameters. Findings – Results confirmed that surface characteristics play important role to determine quality of the reverse engineering (RE) process. The results in terms of completeness, accuracy and noise for point cloud sets have successfully been obtained for milled and polished surfaces. Three-dimensional (3D) comparison analysis suggested larger deviation in cases of polished surface as compared to milled surface. The point cloud set acquired with proposed approach was better in terms of both completeness and noise reduction. Originality/value – There has been an increased demand for measurement of metallic, polished and shiny surfaces in automotive, aerospace and medical industries. These surfaces are very difficult to scan because they exhibit specular reflection instead of diffuse reflection. Laser line scanning probe which is a non-contact method is in great demand for RE. This is due to the fact that it possesses very high data acquisition speed. However, laser scanning is hugely affected by surface characteristics which in turn govern specular reflection.In this paper, it has been shown that a surface that exhibits various degrees of specular reflection can be digitized efficiently if appropriate combination of scanning parameters and positions of laser line scanning probe are used. Also, this paper has attempted to offer a procedure to overcome incompleteness and noise in 3D data as obtained by the laser line scanning probe.

Simplified Expression of Point Cloud Data and STL File Generation Method Based on Laser Line Scanning Mode

2015 ◽  
Vol 52 (10) ◽  
pp. 101003
Author(s):  
姚春荣 Yao Chunrong ◽  
陈兆学 Chen Zhaoxue ◽  
安美君 An Meijun ◽  
王远军 Wang Yuanjun
Keyword(s):  
Point Cloud ◽  
Laser Line ◽  
Point Cloud Data ◽  
Cloud Data ◽  
Stl File ◽  
Line Scanning

Tactile sensing of 3-dimensional surface features

Robotica ◽  
1990 ◽  
Vol 8 (2) ◽  
pp. 111-115 ◽  
Author(s):  
R. Andrew Russell
Keyword(s):  
Data Acquisition ◽  
Tactile Sensing ◽  
Surface Features ◽  
3 Dimensional ◽  
Tactile Probe ◽  
Contact Sensors ◽  
Proximity Sensing ◽  
Dimensional Surface

SummaryRobots will require some form of proximity sensing in order to perform many delicate exploration, assembly and manipulation tasks. This paper describes a novel articulated tactile probe which can locate and accurately measure the 3-dimensional surface contours of small objects. Although lacking the speed of data acquisition possible with vision and other non-contact sensors, the resulting data is easily processed to give useful information about an object.

Magic sol–gel silica films encapsulating hydrophobic and hydrophilic quantum dots for white-light-emission

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20358-20363 ◽  
Author(s):  
Ping Yang ◽  
Hsueh-Shin Chen ◽  
Junpeng Wang ◽  
Quande Che ◽  
Qian Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emission ◽  
Sol Gel ◽  
Silica Film ◽  
White Light Emission ◽  
Silica Films ◽  
White Leds ◽  
3 Dimensional ◽  
Dimensional Surface

A sol–gel silica film was fabricated by a spraying approach on various substrates with a 3-dimensional surface for white LEDs.

scholarly journals Super resolution laser line scanning thermography

2020 ◽  
Vol 134 ◽  
pp. 106279 ◽  
Author(s):  
S. Ahmadi ◽  
P. Burgholzer ◽  
P. Jung ◽  
G. Caire ◽  
M. Ziegler
Keyword(s):  
Super Resolution ◽  
Laser Line ◽  
Line Scanning

Research on the High Precision Laser Line Scanning Measuring System

2007 ◽  
Vol 339 ◽  
pp. 131-135 ◽  
Author(s):  
Jian Jun Ding ◽  
Zhuang De Jiang ◽  
Bing Li ◽  
Jun Jie Guo
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Laser Line ◽  
Measuring System ◽  
Surface Measurement ◽  
Iteration Algorithm ◽  
Reconstruction Method ◽  
Loop Feedback ◽  
Axis Position ◽  
Line Scanning

Rapid reverse technology is one of the key technologies with which the enterprises develop new product and occupy the market rapidly. How to realize the reverse measurement and CAD geometry reconstruction rapidly and accurately is always the most important focus for the researchers. Based on the laser scanning technology, the realization principle of the laser line scanning measuring system is presented and the approaches to improve the precision are also analysed in the paper. The self-adaptation adjustment of the probe position can move the light knife image to the optimal imaging area of the CCD according to the calibration result, which will ensure the measurement precision of the CCD image. With the inner velocity loop and outer position loop feedback control, the simple axis position precision of the mechanical system can be controlled within 5um. In order to pick up the points of the light knife centre rationally and exactly, the reconstruction-disperse iteration algorithm is put forward. After processed by different iteration times, the optimal points can be obtained. The reconstruction method of curve and surface based on NURBS is also given. The paper presents the application and realization of the system at last, which realizes the curve and surface measurement with high precision.

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