Cyber-Physical Systems

Using Wiimote and Kinect for Cognitive Rehabilitation  ◾  331

© 2010 Taylor & Francis Group, LLC

e basic NMF method has been implemented. e whole system is depicted in Figure 21.9

and described step by step in the following:

Step 0. Data preprocess: e training data are preprocessed with moving slide window and

interpolated to the same length as the longest gesture.

Step 1. Training stage (V-construction): Two different ways have been implemented to con-

struct the nonnegative matrix V

n×m

, which is to be factorized to W

n×r

and H

r×m

.

e first way is to directly use the data of each gesture as a row of V, as shown in the fol-

lowing graph:

x

x

x