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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 1 — Jan. 1, 2002
  • pp: 108–115

Correlation image velocimetry: a spectral approach

Stéphane Roux, François Hild, and Yves Berthaud  »View Author Affiliations


Applied Optics, Vol. 41, Issue 1, pp. 108-115 (2002)
http://dx.doi.org/10.1364/AO.41.000108


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Abstract

A method, believed to be new, is introduced to evaluate displacement fields from the analysis of a deformed image compared with a reference image. In contrast to standard methods, which determine a piecewise constant displacement field, the present method gives direct access to spectral decomposition of the displacement field. A minimization procedure is derived and used twice: first, to determine an affine displacement field and, then, the spectral components of the residual displacement. Although the method is applicable to any space dimension, only cases dealing with one-dimensional signals are reported: First, a purely synthetic example is discussed to estimate the intrinsic performance of the method, and a second case deals with a profile extracted from a sample of compressed glass wool.

© 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: October 10, 2000
Revised Manuscript: July 13, 2001
Published: January 1, 2002

Citation
Stéphane Roux, François Hild, and Yves Berthaud, "Correlation image velocimetry: a spectral approach," Appl. Opt. 41, 108-115 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-1-108

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