A robust watermarking and image authentication scheme used for digital contant application

The development of computers and Internet has exploded in the last few years. The digital images are distributed and duplicated easily through WWW, thus the protection of the intellectual property rights of digital images becomes an important issue. In this paper, we proposed two techniques that are robust watermarking and image authentication scheme. The proposed scheme includes two parts. The first is a robust watermarking scheme performed in the frequency domain. It can be used to prove the ownership. The second is a signature process, which can be used to prove the integrity of the image. The input of the signature process is the edge properties extracted from the image. The signature can be correctly verified when the image is incidentally damaged such as lossy compression. Such a scheme can provide a high degree of robustness against JPEG compression attacks. Experimental results are also presented to demonstrate the validity and robustness of the new approach. © 2009 ACADEMY PUBLISHER.