Deconvolving Strain Maps Obtained with the Grid Method
The use of various deconvolution techniques to enhance strain maps obtained with the grid method is addressed in this study. Since phase derivative maps obtained with this measurement technique can be approximated by their actual counterparts convolved by the envelope of the kernel used to extract phases and phase derivatives, non-blind restoration techniques can be used to perform deconvolution. Six deconvolution techniques are compared here in order to restore a synthetic phase derivative map. Obtained results are analyzed and discussed.
KeywordsDeconvolution Displacement Grid method Strain measurement Metrological performance
- 5.Gonzalez RC, Woods RE (2006) Digital image processing, 3rd edn. Prentice-Hall, Upper Saddle River, NJGoogle Scholar
- 6.Sur F, Grédiac M (2013) Towards deconvolution to enhance the grid method for in-plane strain measurement, Inverse Problems and Imaging (In revision)Google Scholar
- 7.Maas AM, Somers PAAM (2006) Two-dimensional deconvolution applied to phase-stepped shearography. Opt Lasers Eng 26:1594–1602Google Scholar