A Novel High-Capacity Information Hiding Scheme Based on Improved U-Net

Table 2

PSNR and SSIM comparison between the proposed scheme and similar schemes.

Schemes		Hidden image	Extracted image
Rehman et al. [11]	PSNR (Ave)^a	32.5	34.7571
	SSIM (Ave)	0.9371	0.93
Li et al. [17]	PSNR (Ave)	42.3	38.45
	SSIM (Ave)	0.987	0.953
Zhang et al. [21]	PSNR (Max)^b	34.89	39.9
	SSIM (Max)	0.9681	0.96
Liu et al. [27]	PSNR (Ave)	39.7708	43.3571
	SSIM (Ave)	0.9828	0.9862
Proposed	PSNR (Ave)	40.8965	49.6028
	SSIM (Ave)	0.9813	0.9963

(Ave)^a represents the average value given in the paper. (Max)^b represents the maximum value given in the paper.