Denoising of digital speckle pattern interferometry fringes by means of Bidimensional Empirical Mode Decomposition

María Belén Bernini; Alejandro Federico; Guillermo H. Kaufmann

doi:10.1117/12.786372

11 August 2008 Denoising of digital speckle pattern interferometry fringes by means of Bidimensional Empirical Mode Decomposition

María Belén Bernini, Alejandro Federico, Guillermo H. Kaufmann

Author Affiliations +

Proceedings Volume 7063, Interferometry XIV: Techniques and Analysis; 70630D (2008) https://doi.org/10.1117/12.786372
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

We present an introduction to the Bidimensional Empirical Mode Decomposition (BEMD) and its application to the denoising of DSPI fringes. The BEMD is based on the decomposition of an image in high and low frequency zero-mean oscillation modes, called intrinsic mode functions (IMFs). The decomposition is carried out through a sifting process which produces many few basis functions than the ones generated by the Fourier or the wavelet transforms. The denoising approach is based on the removal of the first IMFs, so that the filtered image is given by the residue. A normalization algorithm is then applied to the denoised fringes to reduce the oversmoothing caused by the filtering. The performance of this denoising approach was evaluated using computer-simulated DSPI fringes with different fringe density and speckle size, in order to calculate a figure of merit through the comparison with the noise-free fringes. The obtained results are also compared with those produced by other smoothing methods, and the advantages and limitations of the proposed approach are finally discussed.

Citation Download Citation

María Belén Bernini, Alejandro Federico, and Guillermo H. Kaufmann "Denoising of digital speckle pattern interferometry fringes by means of Bidimensional Empirical Mode Decomposition", Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 70630D (11 August 2008); https://doi.org/10.1117/12.786372

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