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Proceedings Paper

Coherence-enhancing diffusion and windowed Fourier filtering for fringe pattern denoising
Author(s): Haixia Wang; Kemao Qian
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Paper Abstract

Fringe patterns produced by various optical interferometric techniques encode the information of deformation, refractive index, vibration, etc.. Noise as one of the key problems affects further processing of the fringe patterns and reduces the final measurement quality. Coherence enhancing diffusion is a partial differential equation based denoising model that suppresses the noise as well as preserves flow-like structures. Windowed Fourier filtering is another useful fringe pattern denoising tool based on windowed Fourier transform. This paper compares these two denoising methods by applying them to fringe patterns with different types of noise and different levels of frequencies. Quantitative results will be given on simulated fringe patterns to illustrate the performance of both methods.

Paper Details

Date Published: 14 April 2010
PDF: 6 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752248 (14 April 2010); doi: 10.1117/12.851856
Show Author Affiliations
Haixia Wang, Nanyang Technological Univ. (Singapore)
Kemao Qian, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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