Title :
Local directional denoising
Author :
Olhede, S.C. ; Walden, A.T.
Author_Institution :
Dept. of Math., Imperial Coll. London, UK
Abstract :
Denoising of complex-valued signals involves the relationships between the real and imaginary parts of the signal. The authors introduce the idea of local directional thresholding, well-suited to signals that are bidirectional overall but unidirectional at any one time, such as Doppler ultrasound, and show its efficacy on synthetic and real data.
Keywords :
signal denoising; wavelet transforms; complex-valued signals denoising; local directioning denoising; wavelet thresholding; Acoustic signal processing; Discrete wavelet transforms; Equations; Filters; Fourier series; Noise reduction; Signal processing; Speech processing; Sufficient conditions; Wavelet transforms; Complex-valued signal; Hilbert transform; denoising; ultrasound; wavelet transform;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2005.859262
