Two denoising methods by wavelet transform
Quan Pan, Lei Zhang, Guanzhong Dai, Hongai Zhang · IEEE Transactions on Signal Processing · 1999
To wavelet-based noise reduction methods are discussed. First, we improve the traditional spatially selective noise filtration technique proposed by Xu et al. (1994). Second, we introduce a new threshold-based denoising algorithm based on undecimated discrete wavelet transform. Simulations and comparisons are given.