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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한의용생체공학회 Biomedical Engineering Letters (BMEL) Biomedical Engineering Letters (BMEL) Vol.5 No.2
- 발행연도
- 2015.1
- 수록면
- 131 - 139 (9page)
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Purpose The purpose of this study is to show the effectiveness of a physiological signal denoising approach called EMDDWT- CLS. Methods This paper presents a new approach for signal denoising based on empirical mode decomposition (EMD), discrete wavelet transform (DWT) thresholding, and constrained least squares (CLS). In particular, the noisy signal is decomposed by empirical mode decomposition (EMD) to obtain intrinsic mode functions (IMFs) plus a residue. Then, each IMF is denoised by using the discrete wavelet transform (DWT) thresholding technique. Finally, the denoised signal is recovered by performing a weighted summation of the denoised IMFs except the residue. The weights are determined by estimating a constrained least squares coefficients; where, the sum of the coefficients is constrained to unity. We used human ECG and EEG signals, and also two EEG signals from left and right cortex of two healthy adult rats. Results The 36 experimental results show that the proposed EMD-DWT-CLS provides higher signal-to-noise ratio (SNR) and lower mean of squared errors (MSE) than the classical EMD-DWT model. Conclusions Based on comparison with classical EMDDWT model used in the literature, the proposed approach was found to be effective in human and animal physiological signals denoising.
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참고문헌 (27)
참고문헌 신청
Madhu S. Nair / 2013 / Speckle Reduction and Contrast Enhancement of Ultrasound Images Using Anisotropic Diffusion with Jensen Shannon Divergence Operator / Biomedical Engineering Letters (BMEL) 3(2):87~94
Nagashettappa Biradar / 2014 / A Novel Hybrid Homomorphic Fuzzy Filter for Speckle Noise Reduction / Biomedical Engineering Letters (BMEL) 4(2):176~185
Jihoon Park / 2014 / Speckle Reduction Techniques in Medical Ultrasound Imaging / Biomedical Engineering Letters (BMEL) 4(1):32~40
Michael Osadebey / 2014 / Optimal Selection of Regularization Parameter in Total Variation Method for Reducing Noise in Magnetic Resonance Images of the Brain / Biomedical Engineering Letters (BMEL) 4(1):55~67
Nagashettappa Biradar / 2015 / Comparative Analysis of Despeckling Filters for Continuous Wave Doppler Images / Biomedical Engineering Letters (BMEL) 5(1):33~44
Nagashettappa Biradar / 2014 / A Novel Hybrid Homomorphic Fuzzy Filter for Speckle Noise Reduction / Biomedical Engineering Letters (BMEL) 4(2):176~185
Jihoon Park / 2014 / Speckle Reduction Techniques in Medical Ultrasound Imaging / Biomedical Engineering Letters (BMEL) 4(1):32~40
Michael Osadebey / 2014 / Optimal Selection of Regularization Parameter in Total Variation Method for Reducing Noise in Magnetic Resonance Images of the Brain / Biomedical Engineering Letters (BMEL) 4(1):55~67
Nagashettappa Biradar / 2015 / Comparative Analysis of Despeckling Filters for Continuous Wave Doppler Images / Biomedical Engineering Letters (BMEL) 5(1):33~44
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