Measuring method for large size planar parts based on edge restoration

被引：0
|
作者：
Li X. [1 ,3 ]
Wang J. [2 ,3 ]
Geng L. [2 ,3 ]
Ye K. [2 ,3 ]
机构：
[1] School of Computer Science & Software Engineering, Tianjin Polytechnic University, Tianjin
[2] School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin
[3] Tianjin Key Laboratory of Optoelectronic Detection Technology and System, Tianjin
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2018年 / 47卷 / 04期
关键词：
Dimensional measurement; Euclidean distance; Large size planar parts; Pseudo edges; Similar triangle method;
D O I：
10.3788/IRLA201847.0417006
中图分类号：
学科分类号：
摘要：
Aiming at the problem that the imaging accuracy of the planar part was decreased due to pseudo edges in the illumination of the backlight, a measurement method for recovering the accurate edge from the pseudo edges of the measured object was proposed. Firstly, pseudo sub-pixel edges of planar parts were extracted by Canny algorithm and surface fitting algorithm. Secondly, upper and lower edge points distinguishing method based on direction angle difference was proposed and the upper edges were restored by the method of mean Euclidean distance. Finally, the upper edges were converted to the measurement plane by the similar triangular method, and dimension of planar parts could be calculated by using the camera calibration parameters. The results show that the absolute error is less than 0.08 mm and the relative error is less than 0.05% in the range of 1 200 mm×800 mm. © 2018, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
引用
收藏
相关论文
共 10 条
  • [1] Wang C., Improved sub-pixel edge location based on spatial moment, International Journal of Simulation Systems, Science & Technology, 17, 11, pp. 1-6, (2017)
  • [2] Fernandes S.R., Estrela V.V., Saotome O., On improving sub-pixel accuracy by means of B-spline, Imaging Systems and Technology, 2014 IEEE International Conference on, (2014)
  • [3] Sun Q., Hou Y., Tan Q., A subpixel edge detection method based on an arctangent edge model, Optik-International Journal for Light and Electron Optics, 127, 14, pp. 5702-5710, (2016)
  • [4] Tong J., Wang Y., Lu J., Et al., Coaxiality measurement of large-size forged components based on CCD, Journal of Jilin University Engineering and Technology Edition, 43, 4, pp. 945-950, (2013)
  • [5] Zhou S., Guo Y., Gao C., Dynamic length measuring system for large scale workpieces, Optics and Precision Engineering, 20, 11, pp. 2472-2478, (2012)
  • [6] Li J., Wang Y., Tong C., Et al., An accurate zernike moment-oriented method for measuring flat strip dimension, Acta Electronica Sinica, 43, 7, pp. 1432-1436, (2015)
  • [7] Duan X., Wang N., Zhao W., Et al., Sub-pixel edge location algorithm based on Gauss integral curved surface fitting, Chinese Journal of Scientific Instrument, 38, 1, pp. 219-225, (2017)
  • [8] Guan B., Wang J., Du W., Et al., Research on sub-pixel recise thresholding for tool contour extraction, Journal of Graphics, 35, 6, pp. 950-953, (2014)
  • [9] Geng L., Ye K., Xiao Z., Et al., Measuring method for planar sheet metal parts based on upper and lower edges distinguish algorithm, Infrared and Laser Engineering, 45, 6, (2016)
  • [10] Xiao Z., Zhu S., Geng L., Et al., Calibration method for parts dimension measurement system based on depth constraint, Infrared and Laser Engineering, 44, 9, pp. 2831-2836, (2015)
1