Separable and Error-Free Reversible Data Hiding in Encrypted Image with High Payload

Table 1

Maximum payload, PSNR in directly decrypted images (PSNRdec) and PSNR in recovered images (PSNRrec) when different block size was used for image Lena.

Block Size	Maximum Payload		Image Quality
	bpp	Bits	PSNRdec	PSNRrec
2×2	0.091	23855	52.96	+∞
3×3	0.123	32328	51.03	+∞
4×4	0.129	33910	50.51	+∞
5×5	0.126	32943	50.28	+∞
8×8	0.114	29870	50.07	+∞