Table 2. Indexing statistics of the NQO1 dataset (25 809 frames, 4.5% of the complete dataset).

	Dense	Sparse 1.0σ	Sparse 1.4σ
Disk space (MB)	166	52	32
Compression	1×	3.2×	5.2×
Frames indexed	22874	20176	20384
Indexing rate (%)	88.6	78.2	79.0