Calibration method for line structured-light parameters based on homography matrix

被引：5

作者：

Hong, Lei ^{[1
]}

Tian, Qi-Liang ^{[2
]}

Ji, Bao-Jian ^{[3
]}

机构：

[1] School of Automotive and Rail Transit, Nanjing Institute of Technology, Nanjing

[2] Nanjing China Construction Chemical Equipment Manufacturing Co. Ltd, Nanjing

[3] Electrical Engineering and Control Science, Nanjing University of Technology, Nanjing

来源：

Guangzi Xuebao/Acta Photonica Sinica | 2015年 / 44卷 / 12期

关键词：

Calibration; Fitting; Homography matrix; Line structured-light; Planar target; Vanishing point;

D O I：

10.3788/gzxb20154412.1212003

中图分类号：

O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 1406 ;

摘要：

The mapping relationship of homography matrix between the image plane and the target plane was calculated by the rectangular corner points, the linear equation of the center line of the structured-light in the target plane was obtained. Based on the vanishing point theory, the coordinates of arbitrary points on structured-light in target line in camera coordinate system was obtained. The light plane equation was fitted by calibration points extracted from multiple images. Experiments show that the method can achieve a fast and an accurate calibration of structured-light plane parameters with the positioning accuracy at 0.437 mm, and suitable for the requirements on industrial field. Compared with the methods based on invariance of cross ratio, the proposed method is more universal which has a higher efficiency to extract calibration points and the target design is more simple. © 2015, Chinese Optical Society. All right reserved.

引用

页数：6

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