Evaluation of Methods for Estimating Fractal Dimension in Motor Imagery-Based Brain Computer Interface

Table 3

Computation times and classification accuracies obtained by modifying the highest performing methodology (Katz’s Method with FKNN) (and the parameters (k and s) used to obtain these values).

	TDFD method		DFD method	DS method
	C3, C4	C3, Cz, C4	C3, Cz, C4	C3, Cz, C4
Classification accuracy (%)	88 (𝑘=5, 𝑠=10)	85 (𝑘=7, 𝑠=64)	84 (𝑘=11)	71 (𝑘=11)
Computation time (s)	3.47 (𝑘=5, 𝑠=10)	0.94 (k=7, 𝑠=64)	0.41 (𝑘=11)	0.26 (𝑘=11)