A denoising scheme for DSPI fringes based on fast bi-dimensional ensemble empirical mode decomposition and BIMF energy estimation

被引:17
作者
Zhou, Yi [1 ]
Li, Hongguang [1 ]
机构
[1] Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
Digital speckle pattern interferometry; Speckle noise; Denoising; Fast bi-dimensional ensemble empirical; mode decomposition; BIMF energy estimation; SPECKLE-PATTERN INTERFEROMETRY; WAVELET TRANSFORM; NOISE-REDUCTION; SIGNALS; DEFORMATIONS; FILTER;
D O I
10.1016/j.ymssp.2012.09.009
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Digital speckle pattern interferometry (DSPI) is a new and efficient technique for measuring the difference in out-of-plane displacement. However, DSPI fringes contain low spatial information degraded with random speckle noise and background intensity. A denoising scheme based on fast bi-dimensional ensemble empirical mode decomposition (FBEEMD) and energy estimation of bi-dimensional intrinsic mode function (BIMF) is proposed to reduce speckle noise in this paper. Furthermore, the denoising scheme is compared with other denoising methods, and evaluated quantitatively using computer-simulated and experimental DSPI fringes. (C) 2012 Elsevier Ltd. All rights reserved.
引用
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页码:369 / 382
页数:14
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