Reversible Image Watermarking Algorithm Based on Quadratic Difference Expansion

Table 4

Comparison between this algorithm, the method in the literature [10], and the method in the literature [11] in terms of payload capacity, SSIM, and PSNR for original images.

Image	Method	Payload in bytes	SSIM	PSNR (%)
				10	30	70	90	100
Lena	Literature [10]	9767	0.918	45.78	43.48	41.58	39.78	38.64
	Literature [11]	37992	0.9232	59.58	55.81	53.28	51.24	50.72
	This algorithm	262144	0.993	74.11	71.97	69.12	67.24	65.47
Baboon	Literature [10]	11056	0.904	45.86	43.84	41.95	40.56	39.76
	Literature [11]	14893	0.9085	58.77	55.24	53.35	52.28	51.34
	This algorithm	262066	0.992	72.03	70.14	68.56	66.07	64.21
Barbara	Literature [10]	13232	0.893	45.66	42.89	39.54	37.10	36.65
	Literature [11]	31423	0.9011	59.62	57.08	53.76	51.87	51.32
	This algorithm	262144	0.992	73.39	70.87	68.16	66.50	64.98
Peppers	Literature [10]	8562	0.936	46.24	44.77	41.82	39.54	38.26
	Literature [11]	29372	0.9393	58.89	55.43	51.85	50.94	50.07
	This algorithm	262096	0.992	72.67	70.12	68.01	65.91	64.35