DOI: 10.5176/2301-3516_OPAP13.39
Authors: R.Balamurugan, S.Muruganand
Abstract:
In this paper a simple technique of double exposure speckle photography is applied to measure small deformation of a surface. Two images of the speckle pattern were recorded; one at the system at rest and another after the deformation was made in surface. By simple subtraction of the digital pictures, we obtain a fringe pattern that gives us information about the deformation. The results of displacement/deformation can be obtained by different methods of analysis of the speckle images has been studied and verified by the conventional methods.
Keywords: Laser speckle, image processing, deformation
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