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Optical Engineering

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
Author(s): Kaifu Wang
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Paper 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.

Paper Details

Date Published: 20 February 2014
PDF: 9 pages
Opt. Eng. 53(2) 024107 doi: 10.1117/1.OE.53.2.024107
Published in: Optical Engineering Volume 53, Issue 2
Show Author Affiliations
Kaifu Wang, Nanjing Univ. of Aeronautics and Astronautics (China)


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