Nonlinear Processing of a Shift Invariant Dwt for Noise Reduction

  title={Nonlinear Processing of a Shift Invariant Dwt for Noise Reduction},
  author={J. E. Odegardz and C. Sidney Burrus and Raymond O. Wells},
A novel approach for noise reduction is presented. Similar to Donoho, we employ thresholding in some wavelet transform domain but use a nondecimated and consequently redundant wavelet transform instead of the usual orthogonal one. Another diierence is the shift invariance as opposed to the traditional orthogonal wavelet transform. We show that this new approach can be interpreted as a repeated application of Donoho's original method. The main feature is, however, a dramatically improved noise… CONTINUE READING


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