Interpolation bias for the inverse compositional Gauss–Newton algorithm in digital image correlation

•The interpolation biases of FA-NR algorithm and IC-GN algorithm can be significantly different.•The reference image gradient estimation can strongly influence the interpolation bias.•The formulas of interpolation bias for the IC-GN algorithms are derived.•The role of gradient estimation is thorough...

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Bibliographic Details

Published in:	Optics and lasers in engineering Vol. 100; pp. 267 - 278
Main Authors:	Su, Yong, Zhang, Qingchuan, Xu, Xiaohai, Gao, Zeren, Wu, Shangquan
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01.01.2018
Subjects:	Digital image correlation Fourier analysis Gradient estimator Interpolation bias Inverse compositional Gauss–Newton algorithm 99-00 Interpolation bias Inverse compositional Gauss–Newton algorithm 00-01 Gradient estimator Fourier analysis Digital image correlation
ISSN:	0143-8166, 1873-0302
Online Access:	Get full text
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