Image Robust Watermarking Method Based on DWT-SVD Transform and Chaotic Map

Table 6

NC values for attacks on watermarked images.

Attacks	Lena	Baboon	Boat	Couple	Pepper	Lake	Man	House	Tower	Sea
1	1	1	1	1	1	1	1	1	1	1
2	0.9996	0.9996	0.9995	0.9996	0.9996	0.9996	0.9996	0.9996	0.9996	0.9995
3	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994
4	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994
5	0.9995	0.9995	0.9995	0.9995	0.9995	0.9995	0.9995	0.9995	0.9995	0.9995
6	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994
7	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994
8	0.9997	0.9997	0.9997	0.9997	0.9998	0.9997	0.9998	0.9996	0.9997	0.9996
9	0.9996	0.9996	0.9996	0.9996	0.9996	0.9996	0.9996	0.9996	0.9995	0.9995
10	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994	0.9994
11	0.9877	0.9285	0.9961	0.9933	0.9750	0.9769	0.9030	0.9700	0.9908	0.9926
12	0.8885	0.9436	0.8576	0.8340	0.9224	0.8787	0.9412	0.8864	0.9800	0.9858
13	0.9911	0.9846	0.9986	0.9989	0.9767	0.9804	0.9936	0.9934	0.9946	0.9867
14	0.9882	0.9803	0.9988	0.9993	0.9743	0.9669	0.9877	0.9929	0.9954	0.9941
15	0.9245	0.9707	0.9359	0.9242	0.9037	0.8382	0.9763	0.9945	0.9861	0.9587
16	0.7964	0.9293	0.8536	0.7231	0.7948	0.8557	0.8298	0.9867	0.9707	0.9278
17	0.9418	0.9054	0.9622	0.9080	0.8629	0.9123	0.8756	0.9604	0.9146	0.9540
18	0.8508	0.8217	0.8758	0.8261	0.8040	0.8277	0.8093	0.8594	0.8423	0.8699
29	0.9825	0.9529	0.9880	0.9641	0.9245	0.9293	0.9439	0.9874	0.9461	0.9865
20	0.9714	0.9292	0.8142	0.9450	0.8933	0.8769	0.9097	0.8158	0.9121	0.9796
21	0.9992	0.9989	0.9991	0.9993	0.9993	0.9898	0.9993	0.9993	0.9993	0.9991
22	0.9997	0.9996	0.9997	0.9997	0.9997	0.9997	0.9997	0.9996	0.9994	0.9946
23	0.9788	0.9646	0.9825	0.9731	0.9707	0.9597	0.9691	0.9822	0.9654	0.9811
24	0.9996	0.9994	0.9995	0.9995	0.9996	0.9991	0.9996	0.9992	0.9997	0.9977