20 February 2014 Adaptive design of ideal low-pass filter based on Fourier-transform spectrum distribution of digital speckle interference fringe patterns by using edge-detection, morphological-operation, and Radon-transform algorithms
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Optical Engineering, 53(2), 024107 (2014). doi:10.1117/1.OE.53.2.024107
Abstract
An adaptive method is proposed in this paper for design of an ideal low-pass filter based on the Fourier-transform spectrum distribution of digital speckle interference fringe patterns. The size and shape of the ideal low-pass filter can be determined automatically by using an adaptive method based on the edge detection and morphological operation. The cutoff frequency of the ideal low-pass filter along arbitrary direction can also be determined automatically by using an adaptive method based on the Radon transform. The ideal low-pass filter designed in the paper can be used effectively for denoising of digital speckle interference fringe patterns in phase-shifting digital speckle pattern interferometry.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Kaifu Wang, "Adaptive design of ideal low-pass filter based on Fourier-transform spectrum distribution of digital speckle interference fringe patterns by using edge-detection, morphological-operation, and Radon-transform algorithms," Optical Engineering 53(2), 024107 (20 February 2014). http://dx.doi.org/10.1117/1.OE.53.2.024107
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KEYWORDS
Linear filtering

Fringe analysis

Digital filtering

Speckle

Phase shifts

Diffraction

Optical filters

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