This paper presents a method for camera calibration based on the orthogonal vanishing point calibration using concentric circles grating and wedge grating. This method, which we believe is new, uses the high-precision characteristics of phase extraction to obtain the feature points, thus decreasing the calibration errors caused by the traditional marker extraction errors of gray pattern. According to the simulation experiment analysis results, the concentric circles grating was designed with seven periods and the wedge grating was designed with four periods. In the real measuring experiment, the grating target and the similar gray concentric circles target were used to calibrate the camera, respectively. Through comparing the reprojective errors of the two methods, the method proposed is proven to improve the calibration accuracy and robustness for the vanishing point calibration algorithm.
© 2012 Optical Society of America
Original Manuscript: January 30, 2012
Revised Manuscript: March 31, 2012
Manuscript Accepted: April 3, 2012
Published: June 7, 2012
Junpeng Xue, Xianyu Su, Liqun Xiang, and Wenjing Chen, "Using concentric circles and wedge grating for camera calibration," Appl. Opt. 51, 3811-3816 (2012)