Research on De-Noising of Ultrasonic Detection Signal via Multiwavelets with Different Preprocessing Methods
Xi Feng Zhou, Hui Ying Suo, Qian Gang Guo · Advanced materials research · 2011
On the basis of introducing multi-wavelet theory, a new soft-threshold function is proposed, and the de-noising effect of Ultrasonic signal is investigated by adopting different preprocessing methods of various multi-wavelet. An improved matrix preprocessing method is proposed for GHM also. Simulation results indicate that the selection of a proper preprocessing method is important for multi-wavelet de-noising. Therefore, it is of great importance to choose a suitable preprocessing method and multi-wavelet in order to obtain a better de-noising effect.