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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 13 — Jul. 1, 2009
  • pp: 1955–1957

High-speed digital-image correlation method

Min Wang, Hao Wang, and Yuwan Cen  »View Author Affiliations

Optics Letters, Vol. 34, Issue 13, pp. 1955-1957 (2009)

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Provided that the software and hardware equipment in a digital-image correlation method is unchanged, the only major factor affecting integer-pixel correlation computation precision and the integer-pixel processing time is the size of the computing window. The bigger the size of the computing window is, the more reliable the computation result is. However, a bigger computing window means longer processing time. For reduction of the integer-pixel processing time without affecting the reliability of the result, a two-step correlation computation method (which uses a small window and a big window in the correlation computation) is proposed. The experiment results confirm the validity of the new method, and the total processing time of this method can be approximately reduced to a twentieth of that of the traditional method.

© 2009 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure

ToC Category:
Image Processing

Original Manuscript: January 16, 2009
Revised Manuscript: May 9, 2009
Manuscript Accepted: May 20, 2009
Published: June 22, 2009

Min Wang, Hao Wang, and Yuwan Cen, "High-speed digital-image correlation method," Opt. Lett. 34, 1955-1957 (2009)

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