Mixed Signature: An Invariant Descriptor for 3D Motion Trajectory Perception and Recognition

Table 1

Sign matching of “𝑑” and “𝑞”.

Match group	Previous signature			Mixed signature
	Average	Min	Max	Average	Min	Max
𝑑-𝑑	22.3	20.5	24.8	28.2	21.0	33.8
𝑞-𝑞	20.1	17.7	23.6	17.8	14.6	21.6
𝑑-𝑞	26.3	23.8	29.4	94.7	71.3	127