A Three-dimensional Camera: Development and Applications of a Three-dimensional Image Measurement System

2011 ◽  
Vol 131 (2) ◽  
pp. 320-328 ◽  
Author(s):  
Cunwei Lu ◽  
Hiroya Kamitomo ◽  
Ke Sun ◽  
Kazuhiro Tsujino ◽  
Genki Cho
Keyword(s):  
Measurement System ◽  
Three Dimensional ◽  
Image Measurement ◽  
Dimensional Image

A Height Measurement Based on Laser Triangulation Probe and a Two Dimensional Image Measurement System for Smart Manufacturing

2015 ◽  
Vol 764-765 ◽  
pp. 1324-1328
Author(s):  
Pen Han Chen ◽  
Chien Hung Liu ◽  
Yu Fen Chen ◽  
Hung Sheng Chiu ◽  
Yu Chi Liu
Keyword(s):  
Measurement System ◽  
Smart Manufacturing ◽  
Measuring Error ◽  
Laser Triangulation ◽  
Two Dimensional ◽  
Image Measurement ◽  
Height Measurement ◽  
Dimensional Image ◽  
Two Dimensional Image ◽  
Auto Focusing

This paper integrated a laser triangulation probe with a two-dimensional image measurement system to measure the height of an object using the auto-focusing method. In the laser triangulation probe, the laser diode was used as the light source and one-dimensional position sensitive detector was adopted to receive the position of the laser spots to detect the height. The laser triangulation probe was used for small height measurement and the auto-focusing method was used for large height measurement. Two standard gauges with thicknesses of 8mm and 8.5mm were used to verify our proposed method. With height difference of 500μm, the experiment results showed the measuring error was within ±3μm and standard deviation was about 0.1μm.

scholarly journals Three-Dimensional Image Measurement by Pattern Projection Using a Single Observation Image

2015 ◽  
Vol 15 (6) ◽  
pp. 29-45
Author(s):  
Ke Sun ◽  
Cunwei Lu
Keyword(s):  
Three Dimensional ◽  
Reference Image ◽  
Image Correction ◽  
Image Measurement ◽  
Complex Objects ◽  
Single Observation ◽  
Dimensional Image ◽  
Wide Range ◽  
Dimensional Measurements ◽  
Surface Reflectivity

Abstract Since three-dimensional image measurement allows object surface shapes and dimensions to be obtained quickly and without any contact, it has recently been intensively studied in a wide range of fields, including industry, medicine and security. Three-dimensional image measurement technologies can be broadly classified into passive techniques, such as stereovision and active techniques, such as patterned light projection. Among these, the method of projecting optimum intensity modulated light patterns for three-dimensional image measurement can obtain three-dimensional information on the measured object with a single projection, so it is expected to be highly applicable in practice. Measurement can be performed using a single observation image when the object to be measured has simple colouration or surface reflectivity, but for complex objects, eliminating the influence of colour and surface reflectivity requires a reference image to correct the intensity of the observed pattern. To address this, we propose an analysis method and image correction technology, using a novel colour system for realizing three-dimensional measurements using only one observation image.

A STUDY OF DENTAL 3D POINTS CLOUD MEASUREMENT SYSTEM BASED ON GRATING PROJECTION

2013 ◽  
Vol 13 (06) ◽  
pp. 1340019
Author(s):  
QINMIAO ZHU ◽  
MOUHU WU ◽  
XINDA HUANG ◽  
BO TAO
Keyword(s):  
Measurement System ◽  
Point Cloud ◽  
Clinical Medicine ◽  
Three Dimensional ◽  
Phase Unwrapping ◽  
Analysis Tool ◽  
Two Dimensional ◽  
3D Point Cloud ◽  
Dimensional Image ◽  
Two Dimensional Image

A novel non-contact dental 3D points cloud measurement system based on grating projection is proposed in this paper. The system has the key functions of calibration, phase unwrapping and conversion of two-dimensional image to the 3D point cloud and so on, and it can provide three-dimensional graphics of the dental wax with rotations and translation to observe and measure the various parts of dental wax surface. The system can be used as a useful test and analysis tool for clinical medicine teaching and researches.

scholarly journals Three-Dimensional Image Measurement of Bubble-Bubble Interaction

2004 ◽  
Vol 24 (Supplement1) ◽  
pp. 173-174
Author(s):  
Yuichi MURAI ◽  
Jian Wu QU ◽  
Fujio YAMAMOTO
Keyword(s):  
Three Dimensional ◽  
Image Measurement ◽  
Dimensional Image ◽  
Bubble Interaction
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