Tracking a Subset of Skeleton Joints: An Effective Approach towards Complex Human Activity Recognition

Table 4

Confusion matrix for activity recognition when using automatic selection of joints.

No.	Activity	1	2	3	4	5	6	7	8	9	10
1	Point in a direction	10
2	Pick from ground		10
3	Check watch			8			2
4	Sit-stand				10
5	Sit and drink				1	9
6	Wave						8		1	1
7	Handshake			1				9
8	Dead ball signal			2					8
9	Four signal						1		1	8
10	Leg bye signal									1	9