SLM-based Testing of Algorithms in Dynamic Speckle Metrology

2017 ◽  
Author(s):  
Elena Stoykova ◽  
Nataliya Berberova ◽  
Dimana Nazarova ◽  
Branimir Ivanov
Keyword(s):  
Dynamic Speckle ◽  
Speckle Metrology

Coarse Quantization in Dynamic Speckle Metrology at Non-uniform Illumination

2020 ◽  
Author(s):  
Elena Stoykova ◽  
Dimana Nazarova ◽  
Lian Nedelchev ◽  
Kwan-Jung Oh ◽  
Joongki Park
Keyword(s):  
Uniform Illumination ◽  
Dynamic Speckle ◽  
Speckle Metrology ◽  
Coarse Quantization

Dynamic Speckle Metrology with Normalized Processing of Compressed Data

2021 ◽  
Author(s):  
Elena Stoykova ◽  
Dimana Nazarova ◽  
Lian Nedelchev ◽  
Branimir Ivanov ◽  
Alexander Machikhin
Keyword(s):  
Dynamic Speckle ◽  
Speckle Metrology ◽  
Compressed Data

scholarly journals Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 276
Author(s):  
Yun Liu ◽  
Peihua Bu ◽  
Mingxing Jiao ◽  
Junhong Xing ◽  
Ke Kou ◽  
...  
Keyword(s):  
Time Correlation ◽  
Digital Holographic Microscopy ◽  
Laser Source ◽  
Speckle Reduction ◽  
Single Shot ◽  
Coherent Noise ◽  
Real Time Measurement ◽  
Dynamic Speckle ◽  
Holographic Microscopy ◽  
Speckle Suppression

The coherent noise always exists in digital holographic microscopy due to the laser source, degrading the image quality. A method of speckle suppression using the dynamic speckle illumination, produced by double-moving diffusers, is presented in digital holographic microscopy. The space–time correlation functions are theoretically analyzed from the statistics distribution in the doubly and singly scattered system, respectively. The configuration of double-moving diffusers is demonstrated to have better performance in speckle suppression compared with the single diffuser and moving-static double diffusers cases. The experiment results verify the feasibility of the approach. The presented approach only requires a single shot interferogram to realize the speckle reduction, accordingly it has the potential application in real-time measurement.

Speckle Metrology Using Holographic Lenses

1984 ◽  
Vol 13 (2) ◽  
pp. 53-57
Author(s):  
Chandra Shakher ◽  
G. Venkata Rao
Keyword(s):  
Speckle Metrology

scholarly journals Dynamic speckle multiplexing scheme in volume holographic data storage and its realization

2003 ◽  
Vol 11 (4) ◽  
pp. 366 ◽  
Author(s):  
Qingsheng He ◽  
Jinnan Wang ◽  
Jiangang Wang ◽  
Minxian Woo ◽  
Guofan Jin
Keyword(s):  
Data Storage ◽  
Holographic Data Storage ◽  
Dynamic Speckle ◽  
Volume Holographic Data Storage

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.

Dynamic speckle processing using wavelets based entropy

2005 ◽  
Vol 246 (1-3) ◽  
pp. 219-228 ◽  
Author(s):  
I. Passoni ◽  
A. Dai Pra ◽  
H. Rabal ◽  
M. Trivi ◽  
R. Arizaga
Keyword(s):  
Dynamic Speckle
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