Perceptual Image Hashing Based on Multitask Neural Network

Table 6

The computational complexity and hash length of each scheme.

Indicator	Proposed	DCP [7]	RP-IVD [4]	RP-NMF [3]	DAE NN-based [24]
Computational complexity (ms)	48.5	154.62	435.2	645.2	17.9
Hash length (digits)	50	64	40	64	50
Multitask function	√	×	×	×	×