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

Table 1

The effective capacity (EC) comparison of the proposed scheme and similar schemes.

	Schemes	Carrier image size	Secret data size	EC (bpp)
Traditional	Ma et al. [1]	512 × 512 (gray)	1741 (bits)	<0.25
	Liu et al. [6]	512 × 512 (RGB)	32 × 32 (RGB)	<0.25
	Wu et al. [10]	512 × 512 (gray)	<256 × 256 (gray)	<2
Deep learning	Aghababaiyan and Mortazavi [3]	512 × 512 (gray)	<2 × 105 (bits)	<1
	Shang et al. [18]	300 × 300 (RGB)	300 × 300 (gray)	2.67
	Yang et al. [22]	256 × 256 (gray)	256 × 256 (bits)	1
	Liu et al. [27]	256 × 256 (RGB)	256 × 256 (gray)	2.67
	Proposed	256 × 256 (RGB)	256 × 256 (gray)	2.67