Reversible Data Hiding in Encrypted Images Based on Adaptive Gradient Prediction

Table 4

The embedding rate of the test images when .

Image
Lena	MED	—	1.2997	2.7703	2.6693	1.9423	0.9933
	GAP	—	1.6660	2.9584	2.7341	1.9559	0.9950
	Proposed	—	1.7021	3.0398	2.7869	1.9707	0.9958
Crowd	MED	0.3629	1.8629	2.5719	2.5336	1.9146	0.9938
	GAP	0.3529	1.9132	2.6538	2.5759	1.9266	0.9942
	Proposed	0.4454	2.0404	2.7535	2.6312	1.9391	0.9943
Lake	MED	—	—	1.0276	2.0587	1.8432	0.9919
	GAP	—	—	1.3471	2.2013	1.8567	0.9914
	Proposed	—	—	1.4239	2.2261	1.8687	0.9918
Beans	MED	—	0.3522	1.5942	2.2255	1.8912	0.9919
	GAP	—	0.1773	1.5036	2.1805	1.8829	0.9917
	Proposed	—	0.2704	1.6302	2.2675	1.9060	0.9934