A DFT-based method for 3D digital image correlation

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Barros, F (Author) Other; Sousa, PJ (Author) Other; Tavares, PJ (Author) Other; Moreira, PMGP (Author) Other

Conference proceedings International

Title: 2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY, ICSI 2017

Pages: 1260-1266

2nd International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 04-07, 2017

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00N-FT5

DOI: 10.1016/j.prostr.2017.07.100

Abstract (EN): The present work describes an approach to digital image correlation (DIC) which is based on calculations performed on the image Fourier domain. The developed method uses the cross-correlation peak of image subsets computed through the discrete Fourier transform (DFT) to arrive at an estimation of the rigid translation between them, thus enabling the detection of three-dimensional shapes from stereo image pairs and the computation of their displacements between images captured at different loading conditions. The method is expected to offer possible advantages in terms of robustness to lighting conditions, displacement estimation precision, and computational speed. In order to verify that this method can reproduce results from conventional DIC, images of a quasi-static tensile test of a round specimen are used to compare the values obtained from the DFT based method with the results from commercial software using the traditional intensity field based approach to DIC. (C) 2017 The Authors. Published by Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7