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

Table 2

Confusion matrix for activity recognition when using all skeleton joints.

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