The Discrete Wavelet Transform and Its Application for Noise Removal in Localized Corrosion Measurements

Table 1

Results of measurement and noise attenuation with wavelet transform and digital filtering.

Signal	Amplitude (µV)	SNR (dB)	Noise Suppression (dB)	Position of the peak potential (µm)
Electrode SVET	−2 to 2	9.03	0	481
Electrode SVET, DWT denoised	−1.10 to 0.80	178.56	169.53	481
Electrode SVET, digital filter	−0.90 to 0.60	38.59	31.31	581