A Novel Method for Hand Movement Recognition Based on Wavelet Packet Transform and Principal Component Analysis with Surface Electromyogram

Figure 4

An example of a sEMG signal decomposed by WPT. (a) original sEMG signal; (b∼i) the eight sub-band signals obtained by decomposing the sEMG signal by WPT.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)