Special Section on Interferometry

Phase reconstruction for depth-resolved wavenumber-scanning interferometry under an environment with salt noise

[+] Author Affiliations
Ziliang Lyu, Yulei Bai, Zhaoshui He, Shengli Xie, Yanzhou Zhou

Guangdong University of Technology, School of Automation, Guangzhou, China

Shuangli Ye

Wuhan University, School of Printing and Packaging, Wuhan, China

Opt. Eng. 56(11), 111703 (Mar 07, 2017). doi:10.1117/1.OE.56.11.111703
History: Received August 12, 2016; Accepted January 11, 2017
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Abstract.  Depth-resolved wavenumber-scanning interferometry (DRWSI) is used to measure the contours or displacement fields inside a structure. One of the most promising phase retrieving algorithms of DRWSI is the eigenvalue decomposition and least-squares algorithm, because it can blindly evaluate the number of interferometric sources with a fine depth resolution. However, it is not robust to noise, in particular, salt noise or impulse noise. In order to significantly improve the immunity of DRWSI to noise, an updated eigenvalue decomposition algorithm is developed in this manuscript by employing the Spearman’s rank (SR) correlation function as a kernel function. Extreme experimental conditions under an environment with salt noise are designed to verify the performance of the new algorithm in DRWSI, called eigenvalue decomposition using SR correlation and Fourier transform. The results show that it is very effective for the phase reconstruction of DRWSI.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Ziliang Lyu ; Yulei Bai ; Zhaoshui He ; Shengli Xie ; Shuangli Ye, et al.
"Phase reconstruction for depth-resolved wavenumber-scanning interferometry under an environment with salt noise", Opt. Eng. 56(11), 111703 (Mar 07, 2017). ; http://dx.doi.org/10.1117/1.OE.56.11.111703


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