用于版权保护的非嵌入式鲁棒数字水印算法

NON-EMBEDDING ROBUST DIGITAL WATERMARKING ALGORITHM FOR COPYRIGHT PROTECTION

提出了一种改进的非嵌入式的鲁棒的数字水印算法。该算法放弃了将水印嵌入到原始图像中的传统做法,而是利用水印信息和原始图像特征生成密钥,并将密钥交由第三方管理,以此作为版权保护的凭证。为了进一步提高算法的鲁棒性,对特征提取的算法作了改进,并采用了灰度图像作为水印标识,实验证明这种非嵌入式的水印算法,一方面使得图像的不可见性得到了完美的满足,另一方面能够抵抗多种攻击,诸如:压缩、加噪、模糊化、剪切。因此,此算法是可行而且有效的。

In this paper,an improved non-embedding watermarking algorithm was proposed.Instead of embedding watermark into source image as in traditional ways,we used watermark information and the source image feature to generate a standard key and handed over it to a third party to manage as the certificate of copyright and ownership.For further improving the robustness of the algorithm,we ameliorated the feature-extraction algorithm and adopted the gray-scale image as watermarking sign.Experiments showed that with this non-embedded watermarking algorithm,the imperceptivity of the image is perfectly satisfied,the proposed algorithm is also highly robust to various attacks,including JPEG compression,additive noise,blurring and cropping.So it is feasible and valid.