【摘要】 提出了一种多重水印技术做为多媒体资料保护的方法,来克服过去许多基于空间、DCT和小波等视觉模块方法的缺点,并自适应于各种图像攻击,嵌入两个功能互补的水印,以期在遇到任何攻击的情况下,至少还有一个水印能存活。以可见的水印宣告版权拥有人,并且用不可见的水印作为版权保护。这两个水印运用不同的技术嵌入在图像中。此外还提出了一个最佳化技术,以禁制搜寻算法实现水印的鲁棒性与改善图像品质。实验结果显示,所提的方法能有效改善数字水印技术中图像品质与水印鲁棒性相互制衡的问题。更多还原

【Abstract】 It presents an image watermarking method for two purposes:one is to notify the copyright owner with a visible watermark,and the other is to protect the copyright with an invisible watermark.These two watermarks are embedded in different domains with different techniques.An innovative watermarking scheme based on Tabu Search(TS) algorithms in both the spatial domain and the transform domain is proposed.The fidelity performance of an existing image watermarking scheme is enhanced through the TS optimization.The experimental results show that the proposed techniques can improve the degraded image quality greatly.Simulation results show that the proposed method may improve the PSNR for embedding the visible watermark and enhance the robustness of the invisible watermark.更多还原