Opto-Electronic Engineering, Volume. 48, Issue 1, 200118(2021)
Camera calibration based on color-coded phase-shifted fringe
Aiming at the low adaptability of blurring noise of target feature points in traditional calibration methods, a calibration method based on the color-coded phase-shifted fringe is proposed. Using a liquid crystal display panel as the calibration target, horizontal and vertical color-coded phase-shifted stripes are displayed in sequence; the orthogonal phase-shifted stripes are obtained by separating color channels; based on the phase-shifteg theory, the intersections of the orthogonal phase truncation lines are calculated as the feature points. After changing the target position multiple times and extracting feature points, the plane-based camera calibration technique is applied to realize the calibration of both the single camera and the binocular system. Furthermore, color-coded phase-shift circles are added to four corners of the target pattern to automatically extract and sort feature points. Accordingly, the effi- ciency of calibration is promoted. The experimental results indicate that when the target image is blurred, the reprojection error of the single-camera calibration is 0.15 pixels, and the standard deviation of the binocular system measurement after calibration is 0.1 mm.
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Wei Boyan, Tian Qingguo, Ge Baozhen. Camera calibration based on color-coded phase-shifted fringe[J]. Opto-Electronic Engineering, 2021, 48(1): 200118
Received: Apr. 10, 2020
Accepted: --
Published Online: Sep. 2, 2021
The Author Email: Boyan Wei (weiboyan@tju.edu.cn)