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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 32 — Nov. 11, 2002
  • pp: 6815–6828

Multiscale displacement field measurements of compressed mineral-wool samples by digital image correlation

François Hild, Bumedijen Raka, Maud Baudequin, Stéphane Roux, and Florence Cantelaube  »View Author Affiliations


Applied Optics, Vol. 41, Issue 32, pp. 6815-6828 (2002)
http://dx.doi.org/10.1364/AO.41.006815


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Abstract

We propose a multiscale approach to determine the displacement field by digital image correlation. The displacement field is first estimated on a coarse resolution image and progressively finer details are introduced in the analysis as the displacement is more and more securely and accurately determined. Such a scheme has been developed to increase the robustness, accuracy, and reliability of the image-matching algorithm. The procedure is used on two different types of examples. The first one deals with a representative image that is deformed precisely and purposefully to assess the intrinsic performances. In particular, the maximum measurable strain is determined. The second case deals with a series of pictures taken during compression experiments on mineral-wool samples. The different steps of the procedure are analyzed and their respective role is assessed. Both reflection and transmission images are tested.

© 2002 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(070.2590) Fourier optics and signal processing : ABCD transforms
(100.2000) Image processing : Digital image processing
(100.5010) Image processing : Pattern recognition
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging

History
Original Manuscript: January 3, 2002
Revised Manuscript: May 28, 2002
Published: November 10, 2002

Citation
François Hild, Bumedijen Raka, Maud Baudequin, Stéphane Roux, and Florence Cantelaube, "Multiscale displacement field measurements of compressed mineral-wool samples by digital image correlation," Appl. Opt. 41, 6815-6828 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-32-6815

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