Premium
Digital Image Correlation: from Displacement Measurement to Identification of Elastic Properties – a Review
Author(s) -
Hild F.,
Roux S.
Publication year - 2006
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.2006.00258.x
Subject(s) - subpixel rendering , digital image correlation , a priori and a posteriori , displacement (psychology) , identification (biology) , displacement field , pixel , digital image , image (mathematics) , computer science , field (mathematics) , artificial intelligence , computer vision , image processing , mathematics , structural engineering , engineering , finite element method , optics , physics , psychology , philosophy , botany , epistemology , pure mathematics , psychotherapist , biology
The current state of the art of digital image correlation, where displacements can be determined for values less than one pixel, enables one to better characterise the behaviour of materials and the response of structures to external loads. A general presentation of the extraction of displacement fields from pictures taken at different instants during an experiment is given. Different strategies can be followed to determine subpixel displacements. New identification procedures are then devised making use of full‐field measurements. A priori or a posteriori routes can be followed. They are illustrated on the analysis of a Brazilian disk test.