基于DCT域和DWT域的图像零水印算法的研究

Research on Image Nonwatermarking Algorithms between DCTdomain and DWTdomain

零水印是数字水印技术的一个新的研究方向,它解决了水印嵌入时鲁棒性与隐蔽性之间的矛盾且更好地保护了原媒体信息。为证明零水印算法的可行性并比较基于不同频域的算法特性,提出了一种基于DCT域和DWT域的零水印算法,最后通过抗攻击测试和识别测试证明两算法的性能稳定、可行性高且各具特点,并揭示两者各自的优势领域。

Nonwatermarking is a new research direction of the digital watermark technique.It availably solves the antinomy between robustness and imperceptibility and protects the copyright of image better.To prove the feasibility of nonwatermark algorithm and compare the capabilities of different algorithms,a DCTdomain algorithm and a DWTdomain algorithm are presented in this paper.The results of antiattacking and identify tests prove their feasibility and show each predominant applied domains.