24 October 2017 Accurate camera calibration with color phase-shifting wedge grating arrays
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Proceedings Volume 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications; 104622O (2017) https://doi.org/10.1117/12.2284906
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
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.
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Bolin Cai, Bolin Cai, Keyi Wang, Keyi Wang, } "Accurate camera calibration with color phase-shifting wedge grating arrays", Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104622O (24 October 2017); doi: 10.1117/12.2284906; https://doi.org/10.1117/12.2284906
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