Projects per year
Abstract
In the field of three-dimensional (3-D) metrology based on fringe projection profilometry (FPP), accurate camera calibration is an essential task and a primary requirement. In order to improve the accuracy of camera calibration, the calibration board or calibration target needs to be manufactured with high accuracy, and the marker points in calibration image require to be positioned with high accuracy. This paper presents an improved camera calibration method by simultaneously optimizing the camera parameters and target geometry. Specifically, a set of regularly distributed target markers with rich coded concentric ring pattern is first displayed on a liquid crystal display (LCD) screen. Then, the sub-pixel edges of all coded bands radial straight lines are automatically located at several positions of the LCD screen. Finally, the sub-pixel edge point set is mapped into parameter space to form a line set, and the intersection of the lines is defined as the center pixel coordinates of each target point to complete the camera calibration. The simulation and experimental results verify that the proposed camera calibration method is feasible and easy to operate, which can essentially eliminate the perspective transformation error to improve the accuracy of camera parameters and target geometry.
Original language | English |
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Article number | 470990 |
Pages (from-to) | 42454-42469 |
Number of pages | 16 |
Journal | Optics Express |
Volume | 30 |
Issue number | 23 |
Early online date | 3 Nov 2022 |
DOIs | |
Publication status | Published - 7 Nov 2022 |
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Dive into the research topics of 'High-accuracy camera calibration method based on coded concentric ring center extraction'. Together they form a unique fingerprint.Projects
- 2 Finished
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ESPRC Centre for Innovative Manufacturing in Advanced Metrology
Jiang, J., Blunt, L., Longstaff, A., Towns-Andrews, L., Scott, P., Myers, A., Fletcher, S. & Ball, A.
1/09/11 → 28/02/17
Project: Research
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Future Advanced Metrology Hub
Jiang, J., Martin, H., Longstaff, A., Kadirkamanathan, V., Turner, M. S., Keogh, P., Scott, P., McLeay, T. E., Blunt, L., Zeng, W., Huntley, J. M., Bills, P., Fletcher, S., Gao, F., Coupland, J. M., Kinnell, P., Mahfouf, M. & Mullineux, G.
1/10/16 → 30/09/23
Project: Research