Perceptual Image Hashing Based on Multitask Neural Network

Table 7

Hash distance between the original image and corresponding tampered version.

Image pair	Hash distance D
(a) and (b)	1.36722
(c) and (d)	6.77353
(e) and (f)	1.5763
(g) and (h)	2.50353
(i) and (j)	1.02164
(k) and (l)	1.14891