Performance of global look-up table strategy in digital image correlation with cubic B-spline interpolation and bicubic interpolation

Global look-up table strategy proposed recently has been proven to be an efficient method to accelerate the interpolation, which is the most time-consuming part in the iterative sub-pixel digital image correlation （DIC） algorithms. In this paper, a global look-up table strategy with cubic B-spline i...

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Bibliographic Details
Published in:Theoretical and applied mechanics letters Vol. 6; no. 3; pp. 126 - 130
Main Authors: Pan, Zhiwei, Chen, Wei, Jiang, Zhenyu, Tang, Liqun, Liu, Yiping, Liu, Zejia
Format: Journal Article
Language:English
Published: Elsevier Ltd 01.05.2016
State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China
Elsevier
Subjects:
Bicubic interpolation
Cubic B-spline interpolation
Digital image correlation
Global look-up table
Inverse compositional Gauss–Newton algorithm
Global look-up table
Bicubic interpolation
Inverse compositional Gauss–Newton algorithm
Digital image correlation
Cubic B-spline interpolation
Inverse compositional Gauss-Newton algorithm
ISSN:2095-0349
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Summary:Global look-up table strategy proposed recently has been proven to be an efficient method to accelerate the interpolation, which is the most time-consuming part in the iterative sub-pixel digital image correlation （DIC） algorithms. In this paper, a global look-up table strategy with cubic B-spline interpolation is developed for the DIC method based on the inverse compositional Gauss-Newton （IC-GN） algorithm. The performance of this strategy, including accuracy, precision, and computation efficiency, is evaluated through a theoretical and experimental study, using the one with widely employed bicubic interpolation as a benchmark. The global look-up table strategy with cubic B-spline interpolation improves significantly the accuracy of the IC-GN algorithm-based DIC method compared with the one using the bicubic interpolation, at a trivial price of computation efficiency.
Bibliography:Digital image correlation Inverse compositional Gauss-Newton algorithm Cubic B-spline interpolation Bicubic interpolation Global look-up table
Global look-up table strategy proposed recently has been proven to be an efficient method to accelerate the interpolation, which is the most time-consuming part in the iterative sub-pixel digital image correlation （DIC） algorithms. In this paper, a global look-up table strategy with cubic B-spline interpolation is developed for the DIC method based on the inverse compositional Gauss-Newton （IC-GN） algorithm. The performance of this strategy, including accuracy, precision, and computation efficiency, is evaluated through a theoretical and experimental study, using the one with widely employed bicubic interpolation as a benchmark. The global look-up table strategy with cubic B-spline interpolation improves significantly the accuracy of the IC-GN algorithm-based DIC method compared with the one using the bicubic interpolation, at a trivial price of computation efficiency.
11-5991/O3
ISSN:2095-0349
DOI:10.1016/j.taml.2016.04.003