High-Capacity Reversible Data Hiding in Encrypted Images by Information Preprocessing

Table 5

Comparisons between [13, 14, 19, 22, 25] and our study.

Test image	Methods	Embedding rate (bpp)	PSNR (dB)
Lena	[13]	0.7556	38.38
	[22]	0.1563
	[25]	0.4	30.01
	[14]	0.0667	55.56
	[19]	0.9641
	Ours (scanned document)	7.7141
Airplane	[13]	0.95	42.22
	[22]	0.1563	60.17
	[25]	0.3722	30.01
	[14]	0.05	55.56
	[19]	0.9889
	Ours (scanned document)	7.9925
Lake	[22]	0.1563	54.84
	[19]	0.9839
	Ours (scanned document)	7.8725
Baboon	[22]	0.1563	40.57
	[19]	0.7478
	Ours (scanned document)	5.9834