Temporal phase retrieval in dynamic speckle interferometry by adaptive emperical mode decomposition

2012 ◽  
Author(s):  
Hao Zhang ◽  
Jin He ◽  
Meng Zhu ◽  
Zhanhua Huang
Keyword(s):  
Phase Retrieval ◽  
Speckle Interferometry ◽  
Temporal Phase ◽  
Mode Decomposition ◽  
Dynamic Speckle

CHARACTERIZING DYNAMIC SPECKLE TIME SERIES WITH THE HURST COEFFICIENT CONCEPT

Fractals ◽  
2004 ◽  
Vol 12 (03) ◽  
pp. 319-329 ◽  
Author(s):  
L. I. PASSONI ◽  
H. RABAL ◽  
C. M. ARIZMENDI
Keyword(s):  
Speckle Pattern ◽  
Time History ◽  
Speckle Interferometry ◽  
Active Materials ◽  
Laser Illumination ◽  
Corn Seed ◽  
Dynamic Speckle ◽  
Hurst Coefficient ◽  
History Of ◽  
Living Tissues

We propose in this work a dynamic speckle descriptor based on a Hurst wavelet estimator. The dynamic speckle or biospeckle is a phenomenon produced by laser illumination of active materials, such as biological tissue or the drying process of paint. Dynamic speckle interferometry is a useful technique for assessing the time evolution of surfaces as also to segment the loci of different activity in living tissues. Considering previous biospeckle characterization based on the autocorrelation function and its relation with the Hurst coefficient, a wavelet-based estimator is proposed as a feature extraction of the dynamic speckle characteristic. Encouraging results of the descriptor performance are obtained via three different experiments: a time history of speckle pattern applied to the drying of painting, segmenting regions in whole field image applied to the viability test of a corn seed and also to the bruising in fruits.

Use of dynamic speckle interferometry for contactless diagnostics of fatigue crack initiation and determining its growth rate

2016 ◽  
Vol 61 (4) ◽  
pp. 563-568 ◽  
Author(s):  
A. P. Vladimirov ◽  
I. S. Kamantsev ◽  
V. E. Veselova ◽  
E. S. Gorkunov ◽  
S. V. Gladkovskii
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Speckle Interferometry ◽  
Dynamic Speckle

Localized analysis of paint-coat drying using dynamic speckle interferometry

2018 ◽  
Vol 106 ◽  
pp. 61-67 ◽  
Author(s):  
Daniel Sierra-Sosa ◽  
Myrian Tebaldi ◽  
Eduardo Grumel ◽  
Hector Rabal ◽  
Adel Elmaghraby
Keyword(s):  
Speckle Interferometry ◽  
Dynamic Speckle ◽  
Localized Analysis
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