Reversible Data Hiding in Encrypted Images Based on Adaptive Gradient Prediction

Table 2

The embedding rate of the test images when .

Image
Lena	MED	—	1.7087	2.7872	2.6770	1.9407	0.9929
	GAP	—	2.0343	2.9882	2.7369	1.9537	0.9945
	Proposed	—	2.0664	3.0642	2.7874	1.9689	0.9957
Crowd	MED	0.9243	2.2093	2.6540	2.5488	1.9133	0.9932
	GAP	0.9153	2.2540	2.7320	2.5863	1.9245	0.9937
	Proposed	0.9985	2.3671	2.8291	2.6379	1.9370	0.9939
Lake	MED	—	—	1.2060	2.0836	1.8390	0.9906
	GAP	—	0.1794	1.5029	2.2203	1.8547	0.9901
	Proposed	—	0.2786	1.5751	2.2413	1.8665	0.9909
Beans	MED	—	0.8664	1.7448	2.2484	1.8867	0.9912
	GAP	—	0.7109	1.6675	2.1988	1.8780	0.9909
	Proposed	—	0.7937	1.7787	2.2785	1.8996	0.9927