Quality Assessment of Speckle Patterns by Estimating RMSE

2017 ◽  
pp. 71-74
Author(s):  
Yong Su ◽  
Qingchuan Zhang
Keyword(s):  
Quality Assessment ◽  
Speckle Patterns

Quality assessment of speckle patterns for digital image correlation by Shannon entropy

Optik ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 4206-4211 ◽  
Author(s):  
Xiao-Yong Liu ◽  
Rong-Li Li ◽  
Hong-Wei Zhao ◽  
Ting-Hai Cheng ◽  
Gao-Jian Cui ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Quality Assessment ◽  
Shannon Entropy ◽  
Digital Image ◽  
Image Correlation ◽  
Speckle Patterns

scholarly journals A New Pattern Quality Assessment Criterion and Defocusing Degree Determination of Laser Speckle Correlation Method

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4728
Author(s):  
Wenxin Hu ◽  
Zhipeng Sheng ◽  
Keyu Yan ◽  
Hong Miao ◽  
Yu Fu
Keyword(s):  
Quality Assessment ◽  
Speckle Pattern ◽  
Correlation Method ◽  
Quality Criterion ◽  
Laser Speckle ◽  
Widespread Application ◽  
Speckle Correlation ◽  
Speckle Patterns ◽  
Speckle Size

The laser speckle correlation method has found widespread application for obtaining information from vibrating objects. However, the resolution and accuracy of the laser speckle correlation method as they relate to the defocusing degree have not been analyzed sufficiently. Furthermore, the possible methods for speckle pattern quality assessment and enhancement have not been studied. In this study, the resolution and accuracy of the laser speckle correlation method are analyzed, and it is found that they are affected by the defocusing degree and speckle pattern quality, respectively. A new speckle pattern quality criterion combining the mean intensity gradient and frequency spectrum was proposed, called CMZ. The quality of the speckle pattern is higher when the CMZ is closer to zero. The proposed criterion was verified by simulated speckle patterns and real speckle patterns with different speckle sizes, densities, and gray contrasts. In the experimental setup stage, a suitable defocusing degree can be selected based on the resolution requirement and optimal speckle size, and other experimental parameters can be determined according to the CMZ criterion. Rotation and vibration experiments verified the effectiveness of the laser speckle correlation method and confirmed the reliability of the experiment preparation based on proposed CMZ criterion.

scholarly journals Quality assessment of speckle patterns for digital image correlation

2006 ◽  
Vol 44 (11) ◽  
pp. 1132-1145 ◽  
Author(s):  
D. Lecompte ◽  
A. Smits ◽  
Sven Bossuyt ◽  
H. Sol ◽  
J. Vantomme ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Quality Assessment ◽  
Digital Image ◽  
Image Correlation ◽  
Speckle Patterns

Amalgam marginal quality assessment: a comparison of seven methods

1997 ◽  
Vol 24 (7) ◽  
pp. 496-505 ◽  
Author(s):  
E. S. GROSSMAN ◽  
J. M. MATEJKA
Keyword(s):  
Quality Assessment
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