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Bias errors in subpixel displacement estimation for optical correlation-based measurement techniques

Blumrich, Frederik (2010) Bias errors in subpixel displacement estimation for optical correlation-based measurement techniques. Optical Engineering, Vol. 49 (6), pp. 1-11. SPIE. DOI: 10.1117/1.3456595.

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Official URL: http://spiedl.org/terms

Abstract

The systematic error introduced when using 1-D peak detection algorithms to decompose elliptically shaped correlation peaks is investigated. First, an analytical description of this error is derived, and it is shown that this error can lead to a systematic influence of more than one pixel. Additionally, a general linear 2-D Gaussian algorithm based on least squares estimation is presented to allow correlation peak detection of elliptically shaped peaks without any significant bias error. Finally, the performance of the presented algorithms for subpixel displacement estimation, as well as algorithms provided by commercial software packages, is tested with artificial image pairs of random dot patterns.

Document Type:Article
Additional Information:Optical Engineering 49(6), 067004, (June 2010), SPIE Digital Library on 29 Jun 2010
Title:Bias errors in subpixel displacement estimation for optical correlation-based measurement techniques
Authors:
AuthorsInstitution or Email of Authors
Blumrich, FrederikUNSPECIFIED
Date:2010
Journal or Publication Title:Optical Engineering
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol. 49
DOI:10.1117/1.3456595
Page Range:pp. 1-11
Publisher:SPIE
Series Name:Online
Status:Published
Keywords:cross-correlation, subpixel, peak detection algorithm, displacement estimation, particle image velocimetry, digital image correlation, projected pattern correlation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Köln-Porz , Göttingen
Institutes and Institutions:Executive Board > Vorstandsbüro
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:21 Jul 2010 14:20
Last Modified:07 Feb 2013 20:38

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