A NEW KIND OF TWICE EMBEDDING DIGITAL WATERMARKING ALGORITHM
This work was supported by the State 863 Program (2003AA148040), the National Natural Science Foundation of China (grant number 10471151,60216263, 6990312), New Century Excellent Talent Support Project of Chinese Ministry of Education, Doctor Station Foundation of Chinese Ministry of Education, Chongqing Tackle Key Problem Program and Chongqing Natural Science Foundation.
This paper proposed a new watermarking embedding algorithm, which embedded the same watermarking twice for more robust. It's different from most algorithms embedded only one watermarking. Considering different frequency-bands have different anti-attack ability, we first embedded the watermarking in the low frequency band. Then choosing some suitable embedding position and combining HVS characteristics, we also embedded the watermarking in the high frequency bands. So, even one is destroyed, there will be the other one. Besides, because of embedding watermarking twice, it contains much more information, so we automatically regulated intensity of watermarking to guarantees watermarking invisible. Experimental results show that the technique is robust and invisible.
