Adjustment for Fringe Grayscale Degradation in Structured Light Center Extraction

doi:10.7652/xjtuxb201802005

您当前的位置：

首页 >

文章列表页 >

Adjustment for Fringe Grayscale Degradation in Structured Light Center Extraction

更新时间：2025-07-09

- Adjustment for Fringe Grayscale Degradation in Structured Light Center Extraction
- Vol. 52, Issue 2, Pages: 30-36(2018)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201802005
  CLC： TP391.1
- Online First：10 February 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
Adjustment for Fringe Grayscale Degradation in Structured Light Center Extraction[J]. 2018, 52(2): 30-36.
DOI：

Adjustment for Fringe Grayscale Degradation in Structured Light Center Extraction[J]. 2018, 52(2): 30-36. DOI： 10.7652/xjtuxb201802005.

摘要

针对结构光三维测量系统中由于被测物表面反射率不均匀和曲率变化较大引起的条纹灰度退化现象

从而导致条纹中心提取精度下降的问题

提出了一种灰度调整方法。首先通过投影单色灰度图像到被测物体上

计算出摄像机采集图像中各个像素点相对于物体表面的调制信息

然后逐点将其代入条纹图像中进行灰度运算

以消除灰度退化项

实现条纹的灰度调整。分别对黑白相间的平板和人脸石膏模型进行实验

结果表明:经灰度调整后

各条纹在横截面上基本满足高斯分布

且条纹灰度分布均匀

从而有效修正了因反射率突变引起的重心偏移; 同时解决了复杂物体图像中因亮度不均匀引起的条纹中心局部断线问题

从而保证了测量数据的完整性。上述结果验证了该方法的有效性和可靠性。

Abstract

In 3-D measurement of structured light system

the fringe grayscale degradation caused by the uneven reflectivity and the large curvature change of measured object surface is frequently encountered. A grayscale adjustment method is thus proposed to improve the accuracy of stripe center extraction. The modulation of each image pixel related to the object surface is obtained by projecting pure gray images to the measured object. And the modulation is applied to the fringe pattern point by point to eliminate the grayscale degeneration term by grayscale operation to adjust the fringe grayscale. The tests with a plate in black and white check and a human face model are conducted. It is shown that each stripe basically follows Gauss distribution on its cross section after the grayscale adjustment

and the fringe grayscale is well distributed

so the deviation caused by the mutation of reflectivity is corrected effectively. The local disconnection of the center line caused by the unevenness of fringe brightness in complex object image is solved meanwhile to ensure the integrity of measured data.

关键词

Keywords

references

USAMENTIAGA R, MOLLEAD J, GARCIA D F. Fast and robust laser stripe extraction for 3D reconstruction in industrial environments [J]. Machine Vision and Applications, 2012, 23(1): 179-196.

李凤娇, 李小菁, 刘震. 基于多尺度分析的激光光条中心点坐标提取方法 [J]. 光学学报, 2014, 34(11): 103-108.

LI Fengjiao, LI Xiaojing, LIU Zhen. A multi-scale analysis based method for extracting coordinates of laser light stripe centers [J]. Acta Optica Sinica, 2014, 34(11): 103-108.

XUE Q, WANG Z, HUANG J. Improving the measuring accuracy of structured light measurement system [J]. Optical Engineering, 2014, 53(11): 112204.

江永付, 江开勇, 林俊义. 线结构光光条中心亚像素精确提取方法 [J]. 激光与光电子学进展, 2015, 52(7): 179-185.

JIANG Yongfu, JIANG Kaiyong, LIN Junyi. Extrication method for sub-pixel center of linear structured light stripe [J]. Laser Optoelectronics Progress, 2015, 52(7): 179-185.

贺俊吉, 张广军. 结构光三维视觉检测中光条图像处理方法研究 [J]. 北京航空航天大学学报, 2003, 29(7): 593-597.

HE Junji, ZHANG Guangjun. Study on method for processing image of strip in structured-light 3D vision measuring technique [J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(7): 593-597.

TRUCCO E, FISHER R B, FITZGIBBON A W, et al. Calibration, data consistency and model acquisition with a 3-D laser striper [J]. International Journal of Computer Integrated Manufacturing, 1998, 11(4): 293-310.

STEGER C. An unbiased detector of curvilinear structures [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 1998, 20(2): 113-125.

王顺, 徐静珠, 张益昕, 等. 结构光光条中心点信度评价方法与应用 [J]. 光学学报, 2011(11): 203-209.

WANG Shun, XU Jingzhu, ZHANG Yixin, et al. Reliability evaluation method and application for light stripe center extraction [J]. Acta Optica Sinica, 2011(11): 203-209.

周兴敏, 刘恒彪, 葛剑敏. 激光三角测量中物面反射光斑重心偏移的修正 [J]. 光学学报, 2015, 35(5): 153-157.

ZHOU Xingmin, LIU Hengbiao, GE Jianmin. Reflected spot center offset correction in laser triangulation measurement [J]. Acta Optica Sinica, 2015, 35(5): 153-157.

YIN X Q, TAO W, FENG Y Y, et al. Laser stripe extraction method in industrial environments utilizing self-adaptive convolution technique [J]. Applied Optics, 2017, 56(10): 2653-2660.

刘振, 李声, 冯常. 基于互相关算法的激光条纹中心提取 [J]. 中国激光, 2013, 40(5): 197-202.

LIU Zhen, LI Sheng, FENG Chang. Laser stripe center extraction based on cross-correlation algorithm [J]. Chinese J Lasers, 2013, 40(5): 197-202.

李莹莹, 张志毅, 袁林. 线结构光光条中心提取综述 [J]. 激光与光电子学进展, 2013, 50(10): 9-18.

LI Yingying, ZHANG Zhiyi, YUAN Lin. Survey on liner structured light stripe center extraction [J]. Laser Optoelectronics Progress, 2013, 50(10): 9-18.

许宁. 线结构光光条图像处理方法研究 [D]. 哈尔滨: 哈尔滨工程大学, 2007: 17-21.

陆枫, 何云峰. 计算机图形学基础 [M]. 北京: 电子工业出版社, 2008: 288-292.

刘涛,杨树明,蒋庄德.超振荡透镜的三维全矢量电磁分析方法.2017,51(8):1-5.[doi:10.7652/xjtuxb201708001]

陈冬,王亚宁,刘亚雄,等.双投影光固化成型方法研究.2017,51(2):149-154.[doi:10.7652/xjtuxb201702023]

何徽,温伟峰,张登洪,等.条纹相机扫描速度调节电路.2013,47(12):66-70.[doi:10.7652/xjtuxb201312012]

赵一博,韩妙飞,闫相国.几种漫射光学成像图像重建算法的比较研究.2012,46(4):106-111.[doi:10.7652/xjtuxb201204 018]

秦玉伟,赵宏,庄仲琴.热光源谱域光学相干层析成像系统.2011,45(11):63-67.[doi:10.7652/xjtuxb201111013]

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

High-Precision Calibration for Wholly Parametric Plane Linear Estimation Algorithm of Projector

Electrothermal Coupling Research on the Evolutionary Law of Anti-Corona Performance for High-Altitude Air-Cooled Generators

Sensitivity Analysis of Foil Geometrical Parameters for the Third-Generation CO2 Gas Foil Bearings Based on Design of Experiments Method

Diffusion Characteristics and Influencing Factors in Case of Hydrogen Leakage from Fuel Cell Vehicles Running in Tunnels

Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System

Related Author

龚春园 1

梁晋 1

温广瑞 1

牌文延 1

李磊刚 1

Related Institution

State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University

Guangdong Shunde Xi'an Jiaotong University Academy

⁰