Coherence-enhancing diffusion and windowed Fourier filtering for fringe pattern denoising

Haixia Wang; Kemao Qian

doi:10.1117/12.851856

14 April 2010 Coherence-enhancing diffusion and windowed Fourier filtering for fringe pattern denoising

Haixia Wang, Kemao Qian

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752248 (2010) https://doi.org/10.1117/12.851856
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

Haixia Wang and Kemao Qian "Coherence-enhancing diffusion and windowed Fourier filtering for fringe pattern denoising", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752248 (14 April 2010); https://doi.org/10.1117/12.851856

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