Description: Advantages: 1. Good filtering effect of signal to noise ratio;
% 2. For the protection of edge along the threshold filter, it will not produce too smooth and Gibbs phenomenon in the case of threshold filtering.
1. Due to the lack of any processing of the edge signal, pulse noise may be retained on the edge.
2. Calculate the correlation coefficient, if the calculated wavelet coefficient point is large, then the correlation coefficient calculation is affected;
% 3. It is necessary to iterate, the iterative noise energy threshold selection is very important.
4. It requires iterative operation, so the calculation is larger than the threshold method;
5. Due to the influence of the decomposition level, the position deviation of the wavelet coefficients on the large scale is larger and the correlation coefficient is not accurate.
(1) the scale of decomposition;
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