摘要
提出了一种基于傅立叶域的数字图像水印算法。该算法把计算出的图像不变质心作为对其进行对数极坐标变换的原点,再作傅立叶变换,取出中频段幅值作为水印嵌入域。该算法具有较好的鲁棒性、可检测性,能同时抵抗几何攻击和信号处理攻击,它在数字图像的版权保护等领域有广泛的应用前景。
A digital image watermarking scheme based on Fourier domain is proposed. This algorithm calculates an Invariant Center of the image and uses it as the origin of log polar mapping. Then 2-D DFT is performed on the LPM image. And then the amplitude of intermediate frequency is used as the watermarking imbedding domain. The watermarked image is robust and detective to geometrical attacks and signal processing attacks. The algorithm therefore has a promising prospect of wide use in the fields of the copyright protection of the digital image etc.
出处
《微计算机信息》
北大核心
2006年第06Z期149-150,226,共3页
Control & Automation
