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Accurate camera calibration with color phase-shifting wedge grating arrays
Author(s): Bolin Cai; Keyi Wang
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Paper Abstract

In order to reduce human interaction and the workload, a method using a color phase-shifting wedge grating array is proposed for accurate camera calibration, which needs only one frame at each pose. Firstly, the zero-phase points are roughly extracted by edge detection algorithm and optimized by windowed bicubic fitting with sub-pixel accuracy. Secondly, a simple linear fitting algorithm is used to obtain zero-phase lines and acquiring their intersection points. Finally, the intersection points coinciding with circle-centers are regarded as feature points to calibrate the camera. The effectiveness and accuracy of the method is verified by experiments with real images even under color-coupling. It is shown that our method is accurate and reliable comparing with the checkerboard.

Paper Details

Date Published: 24 October 2017
PDF: 8 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104622O (24 October 2017); doi: 10.1117/12.2284906
Show Author Affiliations
Bolin Cai, Univ. of Science and Technology of China (China)
Keyi Wang, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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