Application of Fast Fourier Transform (FFT) in Laser Speckle Image Pattern Correlation technique for the metrological measurement

2012 ◽  
Author(s):  
Balamurugan Rajamanickam ◽  
Muruganand Shanmugam
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Laser Speckle ◽  
Correlation Technique ◽  
Speckle Image ◽  
Pattern Correlation ◽  
Image Pattern Correlation Technique ◽  
Image Pattern

scholarly journals 7.2 - Optoelectronics System for Estimating Measurement Error of Image Pattern Correlation Technique

2018 ◽  
Author(s):  
T. Kirmse ◽  
F. Boden ◽  
A. Yu. Poroykov ◽  
K. M. Lapitskiy ◽  
Yu. V. Ivanova ◽  
...  
Keyword(s):  
Measurement Error ◽  
Correlation Technique ◽  
Pattern Correlation ◽  
Image Pattern Correlation Technique ◽  
Image Pattern

Image processing for laser speckle velocimetry using the 2-D fast Fourier transform

1990 ◽  
Vol 29 (35) ◽  
pp. 5298 ◽  
Author(s):  
Thomas Rösgen ◽  
Klaus Wozniak ◽  
Günter Wozniak
Keyword(s):  
Image Processing ◽  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Laser Speckle

scholarly journals Laser Speckle Interferometer for Deformation Measurement based on Fast Fourier Transform method

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
R. Balamurugan
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Cross Correlation ◽  
Fourier Transforms ◽  
Complex Multiplication ◽  
Laser Speckle ◽  
Transform Method ◽  
Fourier Transform Method ◽  
Fast Fourier Transform Method ◽  
Flexible Measurement

<em>In this paper, Laser speckle image processing based on Fast Fourier Transform method for displacement measurement is presented. Capturing Laser speckle images before displacement and after displacement of the specimen is the technique involved in this measurement. The cross correlation is computed by two 2Dimensional Fast Fourier Transforms (one direct and the other is inverse) and a complex multiplication. This is a non-contact, flexible measurement with high accuracy and simple operation. The results are verified by conventional gauge methods.</em>

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