TY - GEN
T1 - An improved wavelet thresholding denoising method with exponential- threshold function based on particle swarm optimizer
AU - Gan, Minggang
AU - Chen, Jie
AU - Yang, Hongwei
PY - 2010
Y1 - 2010
N2 - Wavelet thresholding Denoising is one of main methods to eliminate noises. Via selecting proper threshold value and utilizing nonlinear methods with threshold functions to process wavelet coefficients, the optimum de-noising effect could be obtained in the sense of mean square deviation. Exponential-threshold function is widely used in wavelet thersholding denosing. However, how to select exponents is still an open problem. In this paper, the PSO technique is introduced to select the exponents of the prevalent exponential-threshold function with SNR as index function. Simulation results indicate that adopting the exponential-threshold function which is processed by optimization algorithms, better filtering effect could be acquired than the classical soft-, hard- and threshold methods.
AB - Wavelet thresholding Denoising is one of main methods to eliminate noises. Via selecting proper threshold value and utilizing nonlinear methods with threshold functions to process wavelet coefficients, the optimum de-noising effect could be obtained in the sense of mean square deviation. Exponential-threshold function is widely used in wavelet thersholding denosing. However, how to select exponents is still an open problem. In this paper, the PSO technique is introduced to select the exponents of the prevalent exponential-threshold function with SNR as index function. Simulation results indicate that adopting the exponential-threshold function which is processed by optimization algorithms, better filtering effect could be acquired than the classical soft-, hard- and threshold methods.
KW - Exponential-threshold function
KW - Particle swarm optimizer
KW - Wavelet thresholding denoising
UR - http://www.scopus.com/inward/record.url?scp=77955373794&partnerID=8YFLogxK
U2 - 10.1109/CCDC.2010.5498970
DO - 10.1109/CCDC.2010.5498970
M3 - Conference contribution
AN - SCOPUS:77955373794
SN - 9781424451821
T3 - 2010 Chinese Control and Decision Conference, CCDC 2010
SP - 591
EP - 594
BT - 2010 Chinese Control and Decision Conference, CCDC 2010
T2 - 2010 Chinese Control and Decision Conference, CCDC 2010
Y2 - 26 May 2010 through 28 May 2010
ER -