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8 October 2024 Application of super-resolution camera calibration method in DIC measurements
Haoyu Wang, Xu Wang, Weiqing Sun, Ziwei Wang, Guihua Li
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Proceedings Volume 13260, Fourth International Conference on Advanced Optics and Photonics Research in Engineering (AOPR 2024); 132600S (2024) https://doi.org/10.1117/12.3045173
Event: International Conference on Advanced Optics and Photonics Research in Engineering, 2024, Wuhan, China
Abstract
Camera calibration is an important component of stereo digital image correlation (DIC) measurements. However, traditional calibration images suffer from insufficient information and blurriness during corner detection at low resolutions, which limit the precision of calibration and measurement. To address this issue, a super-resolution corner detection method based on attention mechanism is proposed in this paper. The proposed method enhances the focus on the high-frequency information of calibration corners using attention mechanism, thereby enabling the reconstruction of low-resolution images to improve the accuracy of corner detection during calibration, thus enhancing the quality of camera calibration. Experimental results on DIC camera calibration reveal that the proposed corner detection method exhibits smaller reprojection errors. Furthermore, the calibration results using this method can improve the geometric reconstruction accuracy of DIC.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Haoyu Wang, Xu Wang, Weiqing Sun, Ziwei Wang, and Guihua Li "Application of super-resolution camera calibration method in DIC measurements", Proc. SPIE 13260, Fourth International Conference on Advanced Optics and Photonics Research in Engineering (AOPR 2024), 132600S (8 October 2024); https://doi.org/10.1117/12.3045173
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KEYWORDS
Calibration
Corner detection
Super resolution
Digital image correlation
Camera calibration
Feature extraction
Image restoration
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