The Technology of Circular Parts Precise Measurement Based on Binocular Calibration

Abstract:

A method of measuring the radius of circular parts by binocular stereo vision technology is proposed. First of all the interior and exterior parameters of cameras are acquired by the camera calibration technology. Then the epipolar constraint can be calculated which contains the calibrated information. The image matching which uses the epipolar constraint is done to find the matching points. The three dimensional (3D) coordinates of edges points are reconstructed through trigonometry reconstruction. At last the analytic expression of the plane in which the circle lies and the circles radius are calculated in two steps by Levenberg-Marquardt (LM) algorithm. The proposed method does not require the prior knowledge of position between the measuring plane and the calibration plane which monocular measurement needs. Experimental results show that the measurement has high precision.

• Periodical: Applied Mechanics and Materials (Volumes 333-335)
• Pages: 199-206
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.333-335.199
• Online since: July 2013
• Authors: Chuan Wang, Jie Yang, Yan Wei Zhou
• Keywords: Binocular Calibration, Epipolar Constraint, Image Matching, LM Algorithm

References

[1] Zhang, Zhengyou. A flexible new technique for camera calibration, Pattern Analysis and Machine Intelligence, IEEE Transactions on 22. 11 (2000): 1330-1334.

DOI: 10.1109/34.888718

[2] Canny, John. A computational approach to edge detection., Pattern Analysis and Machine Intelligence, IEEE Transactions on 6 (1986): 679-698.

DOI: 10.1109/tpami.1986.4767851

[3] Peng, Hui, Youxian Wen, and Ruifang Zhai. Stereo matching for binocular citrus images using SURF operator and epipolar constraint., Jisuanji Gongcheng yu Yingyong(Computer Engineering and Applications) 47. 8 (2011): 157-160.

DOI: 10.1109/iciecs.2010.5678393

[4] Jianjun, Yin, Wang Yufei, and Zhong Suyu. Binocular measurement model of locating fruit based on neural network., Information Science and Engineering (ICISE), 2010 2nd International Conference on. IEEE, 2010, pp.1069-1072.

DOI: 10.1109/icise.2010.5689518

[5] Wang, Jian, Defeng Chen, and Tuan Zhao. Research of three-dimensional reconstruction based on computer vision., Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on. IEEE, (2010).

DOI: 10.1109/wicom.2010.5600228

[6] K. Madsen, H.B. Nielsen, and O. Tingleff. Methods for Non-Linear Least Squares Problems,. Technical University of Denmark, 2004. Lecture notes, available athttp: /www. imm. dtu. dk/courses/ 02611/nllsq. pdf.