Robust Image Hashing with Low-Rank Representation and Ring Partition

Table 2

Performances of different ring numbers.

	AUC	Hash length (integer)	Computational time (s)
8	0.98605	8	25.407
16	0.98863	16	27.133
32	0.99012	32	26.957
64	0.99069	64	29.361
80	0.99087	80	33.611