Abstract

N-R algorithm, surface fitting algorithm, gradient algorithm and IC-GN algorithm are the main sub-pixel displacement measurement algorithms in digital image correlation method to improve the displacement measurement accuracy. In this paper, the simulation speckle pattern is generated by computer numerical simulation to carry out experiments, and the calculation accuracy and efficiency of the above four algorithms are compared. The results show that the N-R algorithm has the lowest calculation efficiency and the surface fitting method has the lowest calculation accuracy. The calculation efficiency and accuracy of gradient algorithm, IC-GN method are between N-R algorithm and surface fitting method, which is more suitable for engineering applications.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.