Security and Communication Networks

Research Article

An Improved Bidirectional Shift-Based Reversible Data Hiding Scheme Using Double-Way Prediction Strategy

Table 2

Increased embedding capacity (ΔEC) and its increasing rate (IR), the PSNR (dB) and its decreasing rate (DR), and the increased time (Δt) of eight common images.


Value names		Lena	Barbara	Baboon	Lake	Boat	Bird	Peppers	Harbour

TH = 0 = 0	∆EC (bits) IR	35188 67.3%	27332 71.1%	14824 85.3%	25812 66.9%	23924 71.1%	20556 63.1%	29530 68.9%	25790 62.2%
	PSNR (dB) DR	40.9 8.1%	40.8 8.2%	40.5 8.5%	40.5 8.9%	40.6 8.7%	40.8 8.0%	40.3 9.4%	40.3 9.2%
	∆t (s)	1.74	1.35	1.34	6.05	4.24	1.44	1.38	1.32

TH = 1 = 0	∆EC (bits) IR	16848 11.2%	13533 12.1%	8322 8.21%	12697 10.9%	11893 7.8%	9979 8.27%	13770 8.6%	11795 7.36%
	PSNR (dB) DR	34.44 3.0%	34.60 2.11%	34.12 2.40%	34.39 2.62%	34.45 2.48%	34.9 2.54%	34.33 3.05%	34.37 2.74%
	∆t (s)	1.35	1.33	1.34	1.33	1.39	1.34	1.39	1.37

TH = 1 = 1	∆EC (bits) IR	67764 45.2%	54926 49.3%	33240 65.1%	50796 46.1%	48708 49.4%	43870 60.7%	55856 43.8%	47600 40.1%
	PSNR (dB) DR	32.82 11.2%	32.70 11.2%	32.14 11.5%	32.41 12.1%	32.49 11.8%	32.43 11.0%	32.26 12.2%	32.16 12.3%
	∆t (s)	1.35	1.32	1.35	1.39	1.40	1.43	1.37	1.34

TH = 2 = 0	∆EC (bits) IR	9122 3.9%	7428 4.3%	4558 5.4%	6847 4.0%	6551 4.2%	5425 4.9%	7200 3.6%	6536 3.6%
	PSNR (dB) DR	31.15 2.0%	30.85 1.9%	30.17 2.2%	30.69 2.5%	30.71 2.3%	30.33 2.1%	30.78 2.2%	30.72 2.4%
	∆t (s)	1.34	1.31	1.33	1.39	1.42	3.47	1.51	1.46

TH = 2 = 1	∆EC (bits) IR	54966 23.7%	44662 25.7%	27666 32.7%	41252 24.1%	39150 24.9%	33694 30.2%	44082 21.8%	38686 21.3%
	PSNR (dB) DR	30.93 7.8%	30.70 7.6%	30.09 8.1%	30.42 8.6%	30.47 8.3%	30.26 7.7%	30.38 9.4%	30.43 8.6%
	∆t (s)	1.41	1.39	1.42	1.68	1.38	1.35	1.51	1.36

TH = 2 = 2	∆EC (bits) IR	90566 39.1%	74417 42.9%	46468 55.1%	68132 40.2%	65416 41.6%	59622 53.4%	73688 36.4%	64756 35.7%
	PSNR (dB) DR	30.07 13.4%	30.12 13.3%	30.08 13.7%	30.15 14.3%	30.18 14.0%	30.25 13.2%	30.19 15.2%	30.17 14.4%
	∆t (s)	1.32	1.33	1.36	1.33	1.38	1.32	1.36	1.31