Signal Denoising of MEMS Microstructure Profile
A new signal-denoising approach based on DT-CWT (Dual-Tree Complex Wavelet Transform) is presented in this paper to extract feature information from microstructure profile. It takes advantage of shift invariance of DT-CWT, non-Gaussian probability distribution for the wavelet coefficients and the statistical dependencies between a coefficient and its parent. This approach substantially improved the performance of classical wavelet denoising algorithms, both in terms of SNR and in terms of visual artifacts. A simulated MEMS microstructure signal is analyzed.
Wei Gao, Yasuhiro Takaya, Yongsheng Gao and Michael Krystek
K. Hu et al., "Signal Denoising of MEMS Microstructure Profile", Key Engineering Materials, Vols. 381-382, pp. 69-72, 2008