A Multichannel fNIRS System for Prefrontal Mental Task Classification with Dual-level Excitation and Deep Forest Algorithm

Table 2

Comparison with fNIRS-based mental task classification.

Year/publication	2018 [3]	2015 [6]	2012 [7]	This work
# of detector/source	6/6	18/15	3/10	8/6
Sample rate	13.3 Hz	10 Hz	31.25 Hz	43.8 Hz
Wireless	Yes	No	No	Yes
Weight	Approx. 750 g	Approx. 130Kg	20 kg	450 g
Portability	Yes	No	No	Yes
# of intensity level	1	1	1	2
# of mental state	3	3	3	4
Classifier	sLDA	LDA	LDA	DF
Accuracy	64.1%	71.7%	62.5%	86.9%