The sub-pixel searching algorithm based on gradient in digital speckle correlation method

Author

Linlin Wang ; Chen Tang

Author_Institution

Eng. Training Center, Shenyang Aerosp. Univ., Shenyang, China

fYear

2013

fDate

20-22 Dec. 2013

Firstpage

1417

Lastpage

1421

Abstract

Digital speckle correlation method (DSCM) is an successful nondestructive testing technique for the whole displacements. The computational accuracy is a challenging issue. In this paper, a new gradient-based method is proposed, the accuracy of the method is demonstrated via three computed-simulated speckle image pairs. Combining the method with radial basis function interpolation, two experimentally obtained deformation fields are measured.

Keywords

correlation methods; gradient methods; image processing; interpolation; nondestructive testing; radial basis function networks; speckle; DSCM; deformation fields; digital speckle correlation method; gradient-based method; nondestructive testing technique; radial basis function interpolation; speckle image pairs; sub-pixel searching algorithm; Accuracy; Correlation; Digital images; Displacement measurement; Interpolation; Speckle; Strain; Digital speckle correlation method (DSCM); computational accuracy; gradient-based method; radial basis function;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronic Sciences, Electric Engineering and Computer (MEC), Proceedings 2013 International Conference on

Conference_Location

Shengyang

Print_ISBN

978-1-4799-2564-3

Type

conf

DOI

10.1109/MEC.2013.6885289

Filename

6885289