Two-Layer Fragile Watermarking Method Secured with Chaotic Map for Authentication of Digital Holy Quran

Table 12

PSNR results on Gaussian noise attack.

#		1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
JPEG
001	Bef.	40.74	40.12	43.06	45.01	47.61	48.99	50.65	51.20	51.80	52.05	52.19	52.25	52.27	52.28	52.30
	Aft.	40.80	40.25	42.87	44.53	46.59	47.59	48.64	48.97	49.29	49.42	49.49	49.52	49.53	49.54	49.55
003	Bef.	42.50	41.93	44.86	46.75	49.27	50.69	51.84	52.69	53.00	52.99	53.24	53.27	53.27	53.29	53.28
	Aft.	42.07	41.60	43.92	45.24	46.73	47.42	47.88	48.19	48.29	48.28	48.36	48.37	48.37	48.37	48.37
050	Bef.	42.20	41.61	44.55	46.37	48.90	50.26	51.62	52.35	52.71	52.88	52.98	53.01	53.04	53.06	53.06
	Aft.	41.83	41.34	43.69	45.01	46.55	47.24	47.81	48.08	48.20	48.25	48.29	48.30	48.31	48.31	48.31
601	Bef.	41.97	41.22	44.15	46.14	48.68	49.97	51.52	52.12	52.48	52.75	52.89	52.90	52.93	52.94	52.95
	Aft.	41.70	41.06	43.47	44.96	46.61	47.30	48.01	48.25	48.39	48.48	48.53	48.54	48.55	48.55	48.55
PNG
001	Bef.	38.78	38.05	42.94	43.94	48.10	50.04	53.84	56.05	59.64	62.35	66.37	68.80	72.36	74.01	80.24
	Aft.	28.95	28.96	28.92	28.92	28.91	28.91	28.91	28.90	28.90	28.90	28.90	28.90	28.90	28.90	28.90
003	Bef.	38.02	37.39	41.30	43.22	47.20	49.35	52.95	55.29	58.69	61.17	65.52	68.35	70.81	73.75	78.57
	Aft.	28.99	29.00	28.97	28.96	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95
050	Bef.	37.34	36.81	41.30	42.74	46.43	48.89	52.32	54.77	58.10	60.86	64.01	67.77	70.21	73.00	79.44
	Aft.	29.00	29.00	28.97	28.97	28.96	28.96	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95	28.95
601	Bef.	37.15	36.55	40.31	42.64	46.30	48.58	52.12	54.49	57.70	60.66	64.11	67.71	70.96	74.78	76.58
	Aft.	29.02	29.03	28.99	28.99	28.98	28.98	28.98	28.97	28.97	28.97	28.97	28.97	28.97	28.97	28.97