Title :
Denoising by optimal fuzzy thresholding in wavelet domain
Author :
Shark, L.K. ; Yu, C.
Author_Institution :
Dept. of Eng., Central Lancashire Univ., Preston, UK
fDate :
3/16/2000 12:00:00 AM
Abstract :
The construction of a hybrid wavelet threshold is presented based on fuzzy combination of an unbiased risk estimate and an asymptotic near-minimax fixed threshold for noise suppression. The optimality of the proposed threshold is demonstrated by recovering a Gaussian envelope sinusoidal signal embedded in the additive white Gaussian noise in good and poor signal-to-noise ratio scenarios
Keywords :
AWGN; discrete wavelet transforms; fuzzy logic; interference suppression; signal reconstruction; AWGN embedded signal; DWT; Gaussian envelope sinusoidal signal; SNR; additive white Gaussian noise; asymptotic near-minimax fixed threshold; denoising; hybrid wavelet threshold; noise suppression; optimal fuzzy thresholding; unbiased risk estimate; wavelet domain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000451
