A DFT-based method for 3D digital image correlation

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2017

Autores

Barros, F (Autor) Outra; Sousa, PJ (Autor) Outra; Tavares, PJ (Autor) Outra; Moreira, PMGP (Autor) Outra

Ata de Conferência Internacional

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

Páginas: 1260-1266

2nd International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 04-07, 2017

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7