Instrumentation, Techniques, and Measurement

Deformation measurement using digital image correlation by adaptively adjusting the parameters

[+] Author Affiliations
Jian Zhao

Beijing Forestry University, School of Technology, Tsinghua East Road, Beijing 100083, China

Opt. Eng. 55(12), 124104 (Dec 16, 2016). doi:10.1117/1.OE.55.12.124104
History: Received August 19, 2016; Accepted November 29, 2016
Text Size: A A A

Abstract.  As a contactless full-field displacement and strain measurement technique, two-dimensional digital image correlation (DIC) has been increasingly employed to reconstruct in-plane deformation in the field of experimental mechanics. In practical application, it has been demonstrated that the selection of subset size and search zone size exerts a critical influence on measurement results of DIC, especially when decorrelation occurs between the reference image and the deformed image due to large deformation over the search zone involved. Correlation coefficient is an important parameter in DIC, and it also makes the most direct connection between subset size and search zone. A self-adaptive correlation parameter adjustment method based on correlation coefficient threshold to realize measurement efficiently by adjusting the size of the subset and search zone in a self-adaptive approach is proposed. The feasibility and effectiveness of the proposed method are verified through a set of experiments, which indicates that the presented algorithm is able to significantly reduce the cumbersome trial calculation as compared with the traditional DIC, in which the initial correlation parameters needed to be manually selected in advance based on practical experience.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jian Zhao
"Deformation measurement using digital image correlation by adaptively adjusting the parameters", Opt. Eng. 55(12), 124104 (Dec 16, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.124104


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement


 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.