Reversible Data Hiding with Pixel Prediction and Additive Homomorphism for Encrypted Image

Table 4

Embedding rates and PSNR of the directly decrypted images with r=2.

Image		Lena	Airplane	Barbara	Baboon	Peppers	Boats	Man	Tiffany
tau		37311	46145	68543	114244	62886	38897	38894	52038
t1		12437	15382	22848	38081	20962	12966	12965	17346
t2		363	490	192	319	30	346	347	62
t3		2482	2464	2419	2332	2431	2479	2479	2452
t4		4728	5897	12091	32900	10396	5232	7294	7774
EC	bit	446957	429677	380645	262780	393764	443345	439224	416982
	bpp	1.705	1.6391	1.452	1.002	1.5021	1.6912	1.6755	1.5907
PSNR(dB)		23.78	23.4564	20.4752	16.9237	23.1429	23.3794	21.8245	21.6842