Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : Sumithra.D | R.Gomathi  unnamed

Volume 03 Issue 07 2016

ISSN no:  2348-3121

Page no: 66-70

Abstract – Speckle patterns are generally produced by light scattered from an optically rough surface when illuminated by coherent light. Fast Fourier transform algorithm for carrying out this task. It has been shown that the fringe projection can be applied for the measurement of out-of-plane deformation. In this project is a method for recovering data from a simple portable Digital Speckle Pattern Interferometer. In speckle interferometry, the object is illuminated with a coherent light source and the image of the object is recorded before and after the deformation/ displacement. The main task was picking out usable interferograms from large amount of frames. In this paper  to developed a PC-based method based on jointly analysis of spectral content and fringe image sharpness as selection rules. The selected frames  are reutilized for off-line processing by using an approach based on Hilbert Transform and Phase Unwrapping via Max flow (PUMA) algorithm.  It is obtained a collection of displacement-maps, that allowed for evaluating the whole structure deformations, caused by environmental thermo-hygrometric fluctuations. Our preliminary results demonstrated the system as an useful tool for utilization in a noisy location. 

Keywords— Data Recovery, Image Processing, Speckle Pattern 


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