3D Body Measurement System Based on Structured Light

2012 ◽  
Vol 503-504 ◽  
pp. 1280-1283
Author(s):  
Zhong Yang Li ◽  
Ze Yuan Liu ◽  
Bai Tong Wang ◽  
Xiu Xiang Huang
Keyword(s):  
Measurement System ◽  
Vision System ◽  
Structured Light ◽  
Calibration Method ◽  
Profile Measurement ◽  
Body Measurement ◽  
Standard Data ◽  
Projection Profile ◽  
Cad Cam ◽  
Visual Interface

This paper presents a 3D body measurement system based on structured light. We analyze the principal of projection profile measurement and model binocular system with two cameras which comprise a stereo vision system. The goal of calibration method is to achieve the high accuracy for human body dimensions. The system software based on VS 2008 and OpenGL provides a visual interface with standard data interface for CAD/CAM.

Research on Calibration Method of Linear Structured Light Vision Measurement System

2014 ◽  
Vol 644-650 ◽  
pp. 1234-1239
Author(s):  
Tao He ◽  
Yu Lang Xie ◽  
Cai Sheng Zhu ◽  
Jiu Yin Chen
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Structured Light ◽  
Target Position ◽  
Calibration Method ◽  
Measurement Model ◽  
Sensor Calibration ◽  
Vision Measurement ◽  
Set Up ◽  
Structured Light Vision

This template explains and demonstrates how to design a measurement system based on the size of the linear structured light vision, the system could works at realized the high precision and fast measurement of the size of mechanical parts, and accurate calibration of the system. First of all, this paper set up the experimental platform based on linear structured light vision measurement. Secondly, this paper established a system of measurement model, and puts forward a new method of calibration of structured light sensor and set up the mathematical model of sensor calibration. This calibration method only need to use some gage blocks of high precision as the target, the target position need not have a strict requirements, and the solving process will be more convenient, much easier to field use and maintenance. Finally, measuring accuracy on the system by gage blocks with high precision is verified, the experiment shows that measurement accuracy within 0.050 mmin the depth of 0-80 - mm range. This system can satisfy the demands of precision testing of most industrial parts .with its simple calibration process and high precision, it is suitable for the structured light vision calibration.

The Calibration Method of a stereo-Vision-Based Coordinates Measurement System via a Two-Axis Turntable--The Combination of Stereo Vision and Turntable

2021 ◽  
Vol 14 ◽  
Author(s):  
Zimiao Zhang ◽  
Zhiwu Wang ◽  
Shihai Zhang ◽  
Anqi Fu
Keyword(s):  
Stereo Vision ◽  
Measurement System ◽  
Vision System ◽  
Three Dimensional ◽  
Calibration Method ◽  
Measurement Range ◽  
Measurement Technology ◽  
Rotation Axes ◽  
Internal Parameters ◽  
Calibration Methods

Background: Stereo-vision-based three-dimensional coordinates measurement technology has been widely applied in the military or civil fields. There are two problems that need to be solved. The first problem is that each camera internal parameters and the two cameras external parameters need to be calibrated. To increase the measurement range, usually the turntable is used with the stereo vision system together. The second problem is the calibration of the turntable. Objective: The aim of the study is to construct and calibrate a stereo-vision-based coordinates measurement system via a two-axis turntable. Methods: Considering that the internal parameters of each camera do not change during the measurement process and the complicated optimization process of one-step self-calibration, a two-step stereo vision calibration method is proposed. In the first step, we calibrate the internal parameters of each camera through a specially designed planar target with circular points. In the second step, on the basis of the calibrated results of the internal parameters, the two cameras external parameters are calibrated through a simple target which could be distributed in the measurement volume. For the calibration of the two-axis turntable, we calibrated the rotation axes of the turntable and the coordinates of points in the 3D space could be measured considering the non-orthogonality of the axes. Results: Some experiments are provided to examine the calibration methods we proposed. They are the plane target measurement experiments, the standard ball center coordinates measurement experiments and target pose measurement experiments. Experiment results demonstrate the superiority of the calibration method we proposed. Conclusion: We studied the calibration methods of the stereo-vision-based coordinates measurement system via a two-axis turntable. The experimental results show the measurement accuracy of our system is less than 0.1mm.

Novel Calibration Method for Axes in Line Structured Light Vision Measurement System

2012 ◽  
Vol 39 (11) ◽  
pp. 1108014 ◽  
Author(s):  
陈新禹 Chen Xinyu ◽  
马孜 Ma Zi ◽  
陈天飞 Chen Tianfei ◽  
李鹏 Li Peng
Keyword(s):  
Measurement System ◽  
Structured Light ◽  
Calibration Method ◽  
Vision Measurement ◽  
Structured Light Vision

Calibration Method of 3D Body Measurement System Using Stripe Grating Projection

2012 ◽  
Vol 503-504 ◽  
pp. 1265-1269
Author(s):  
Xiu Xiang Huang ◽  
Qing Tan ◽  
Yi Min Xia ◽  
Ze Yuan Liu ◽  
Lei Cai
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Calibration Method ◽  
High Accuracy ◽  
Body Measurement

Calibration is crucial to the accuracy of grating measurement, which directly determines the accuracy of the measurement. The traditional calibration principle is easily influenced by some factors in projection measurement for lack of flexibility. This paper presents a new calibration method by using and improving Zhang’s Calibration Method, by which high accuracy and efficiency are achieved with low cost.

A simple calibration method for structured light-based 3D profile measurement

2013 ◽  
Vol 48 ◽  
pp. 187-193 ◽  
Author(s):  
Jing Xu ◽  
Jules Douet ◽  
Jianguo Zhao ◽  
Libin Song ◽  
Ken Chen
Keyword(s):  
Structured Light ◽  
Calibration Method ◽  
Profile Measurement ◽  
3D Profile

Projector Calibration Method Based on Projective Transformation for Structured Light Measurement System

2012 ◽  
Vol 39 (10) ◽  
pp. 1008004
Author(s):  
高治华 Gao Zhihua ◽  
王昭 Wang Zhao ◽  
黄军辉 Huang Junhui ◽  
高建民 Gao Jianmin
Keyword(s):  
Measurement System ◽  
Projective Transformation ◽  
Structured Light ◽  
Calibration Method ◽  
Projector Calibration ◽  
Light Measurement
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