Adaptive and separable multiary reversible data hiding in encryption domain

EURASIP Journal on Image and Video Processing

Table 4 Comparisons among four methods in terms of SSIM

Method	Parameter setting	Lena	Couple	Boat	Man	Peppers	Baboon
Li et al. (2018)	T = 1	0.9999	0.9998	0.9998	0.9999	0.9999	n/a
Xu and Su (2019)	β = 0	0.9903	0.9744	0.9827	0.9858	0.9820	0.9387
Xu and Su (2019)	β = 1	0.9887	0.9689	0.9803	0.9839	0.9717	0.9340
Xu and Wang (2016)	T_n = − 1 T_p = 0	0.9999	0.9999	0.9998	0.9999	0.9999	0.9956
	T_n = − 1 T_p = 1	0.9998	0.9998	0.9996	0.9998	0.9998	0.9948
	T_n = − 2 T_p = 1	0.9997	0.9995	0.9994	0.9996	0.9997	0.9944
Proposed	Q = 2	0.9999	0.9999	0.9999	0.9999	0.9999	0.9999
	Q = 3	0.9999	0.9999	0.9999	0.9999	0.9999	0.9999
	Q = 4	0.9999	0.9999	0.9999	0.9999	0.9999	0.9999