Title :
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
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;
Conference_Titel :
Mechatronic Sciences, Electric Engineering and Computer (MEC), Proceedings 2013 International Conference on
Conference_Location :
Shengyang
Print_ISBN :
978-1-4799-2564-3
DOI :
10.1109/MEC.2013.6885289
