Table 1.

Sample distribution in the training set for the 11-class classification scenario.

Ref.	Class
	DDH	DDT	DDU	DH	DT	DU	Norm	OSF	SS	DE	KL
[67]	594	498,602	484,127	942	317,899	526,487	4000	9002	36,700	102	106
[68]	1582	1,563,808	1,517,208	2376	985,280	1,652,759	7634	28,662	117,069	94	1175
[69]	1582	1,563,808	1,517,208	2376	985,280	1,652,759	7634	28,662	117,069	94	1175
[40]	786	781,468	759,163	1191	492,581	826,475	385	14,101	51,351	5	66
Ours	588	586,393	568,760	906	369,965	619,414	290	10,795	43,949	4	48