Human Action Recognition Using Improved Salient Dense Trajectories

Table 2

Comparison of different optimizations based on DTF.

Datasets	BOW		IBOW		Fisher vector (FV)
	DTF	ISDTF	DTF	ISDTF	DTF
KTH	94.2% [16]	95.5%	96.1%	97.6%	—
UCF sports	88.2% [16]	90.4%	90.8%	93.4%	—
HMDB51	46.6% [9]	50.9%	52.9%	56.7%	52.2% [29]
UCF50	84.5% [9]	86.5%	88.5%	90.3%	88.6% [29]