Wavelet denoising method based on adaptive threshold
An adaptive threshold and wavelet denoising technology, applied in the field of signal processing, to achieve the effect of accurately removing white noise and avoiding discontinuity
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[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and examples of implementation.
[0035] Such as figure 1 Shown, a kind of wavelet denoising method based on adaptive threshold of the present invention comprises the following steps:
[0036] Step (1): Carry out wavelet decomposition on the noise-stained signal to obtain the wavelet coefficients of each layer and the scale coefficient of the highest layer;
[0037] Step (2): Obtain the adaptive threshold of wavelet coefficients in each layer by iterative filtering;
[0038] Step (3): Using the chi-square energy window method to extract the pulse corresponding coefficients from the wavelet coefficients of each layer;
[0039] Step (4): Set the non-impulse corresponding coefficients in the wavelet coefficients of each layer to zero to obtain the processed wavelet coefficients;
[0040] Step (5): The denoising signal is obtained by reconstructing the wavelet coefficien...
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