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

Table 14

PSNR results on median filtering 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.	41.81	41.75	42.11	42.20	42.28	42.29	42.31	42.32	42.32	42.32	42.32	42.32	42.33	42.33	42.33
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.	41.51	41.44	41.87	42.00	42.10	42.13	42.15	42.16	42.16	42.16	42.16	42.16	42.16	42.16	42.16
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.	41.23	41.17	41.57	41.69	41.78	41.80	41.83	41.84	41.84	41.84	41.84	41.84	41.84	41.84	41.84
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.	40.93	40.83	41.22	41.32	41.39	41.41	41.44	41.44	41.44	41.45	41.45	41.45	41.45	41.45	41.45
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.	38.66	37.95	42.64	43.57	47.19	48.69	51.13	52.15	53.27	53.78	54.15	54.27	54.35	54.37	54.41
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.	37.83	37.23	40.90	42.60	45.79	47.22	49.07	49.88	50.62	50.91	51.18	51.26	51.29	51.32	51.34
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.	37.09	36.58	40.71	41.92	44.72	46.21	47.73	48.45	49.01	49.28	49.44	49.53	49.56	49.57	49.59
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.	36.84	36.25	39.69	41.65	44.28	45.56	46.99	47.61	48.09	48.33	48.47	48.54	48.57	48.58	48.59