Table 1.

The popular dataset of human action recognition.

Dataset Name	Color	Depth	Skeleton	Samples	Classes
Hollywood2 [97]	√	×	×	1707	12
HMDB51 [98]	√	×	×	6766	51
Olympic Sports [99]	√	×	×	783	16
UCF50 [100]	√	×	×	6618	50
UCF101 [101]	√	×	×	13,320	101
Kinetics [102]	√	×	×	306,245	400
MSR-Action3D [103]	×	√	√	567	20
MSR-Daily Activity [104]	√	√	√	320	16
Northwestern-UCLA [105]	√	√	√	1475	10
UTD-MHAD [106]	√	√	√	861	27
RGBD-HuDaAct [107]	√	√	×	1189	13
NTU RGB+D [108]	√	√	√	56,880	60