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

Kaifu Wang

doi:10.1117/1.OE.53.2.024107

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

Kaifu Wang

Author Affiliations +

Optical Engineering, Vol. 53, Issue 2, 024107 (February 2014). https://doi.org/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.

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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). https://doi.org/10.1117/1.OE.53.2.024107

Published: 20 February 2014

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