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Noise reduction by discrete image shifting in DPIV

Westerweel, J. and Dabiri, D. and Gharib, M. (1995) Noise reduction by discrete image shifting in DPIV. In: Flow visualization VII. Begell House , New York, pp. 688-694. ISBN 9781567000368.

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Image shifting by removing the integer-pixel displacement in cross-correlation analysts of single-exposure digital image pairs optimizes the accuracy for estimating the location of the displacement-correlation peak in digital particle image velocimetry (PJV). The effect is predicted by an analytical model for the statistical properties of estimators for the displacement. The predicted noise reduction is observed in the analysis of synthetic PIV images of isotropic turbulence and in actual measurements of grid-generated turbulence.

Item Type:Book Section
Additional Information:© 1995 Begell House. The research of J. Westerweel has been made possible by a fellowship of the Royal Netherlands Academy of Arts and Sciences. The visit of J. Westerweel to the C.Q.V. was supported by URI (N00014-92-J-1618) from the Office of Naval Research.
Funding AgencyGrant Number
Royal Netherlands Academy of Arts and SciencesUNSPECIFIED
Office of Naval Research (ONR) URIN00014-92-J-1618
Record Number:CaltechAUTHORS:20130912-131326617
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41294
Deposited By: Tony Diaz
Deposited On:12 Sep 2013 22:45
Last Modified:03 Oct 2019 05:47

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