Table 2.

Storage order of key nodes.

English name of gateway	Chinese name of the key node	Corresponding number
HIP_CENTER	Middle of hip	0
SPINE	Spine	1
SHOULDER_CENTER	Middle of the shoulder	2
HEAD	Head	3
SHOULDER_LEFT	Left shoulder	4
ELBOW_LEFT	Left elbow	5
WRIST_LEFT	Left wrist	6
HAND_LEFT	Left hand	7
SHOULDER_RIGHT	Right shoulder	8
ELBOW_RIGHT	Right elbow	9
WRIST_RIGHT	Right wrist	10
HAND_RIGHT	Right hand	11
HIP_LEFT	Left hip	12
KNEE_LEFT	Left knee	13
ANKLE_LEFT	Left ankle	14
FOOT_LEFT	Left foot	15
HIP_RIGHT	Right hip	16
KNEE_RIGHT	Right knee	17
ANKLE_RIGHT	Right ankle	18
FOOT_RIGHT	Right foot	19