In this paper, a parallax correction method for a digital array high-speed imaging system in dynamic deformation measurement is proposed based on the digital image correlation (DIC) technique. First, a new type of digital array high-speed imaging system is designed and the optical parallax of this system is analyzed. Second, a parallax correction method based on the sub-pixel shift concept is employed to eliminate the optical parallax. Finally, the corrected dynamic deformation fields of three-point bending specimen under low-speed impact are obtained using the parallax correction method. The numerical results of the dynamic deformation are in good agreement with the corrected results, which verifies the effectiveness of the proposed parallax correction method.
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This work is supported by the National Natural Science Foundation of China (Grant No.11272179).
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Liu, W., Yao, X., Wang, S. et al. Parallax Correction for a Digital Array High-Speed Imaging System for Dynamic Deformation Measurements. Exp Mech 57, 457–473 (2017). https://doi.org/10.1007/s11340-016-0251-1
- Digital array high-speed imaging
- Digital image correlation (DIC)
- Dynamic deformation
- Optical parallax
- Sub-pixel shift