强鲁棒性全息水印算法

提出了一种强鲁棒性变换域全息水印算法。首先将RGB模式彩色载体图像分离通道,分块后运用DCT转换到变换域,将奇异值分解与傅里叶全息技术结合起来,改善了传统全息水印抗滤波差及不可旋转的缺点。计算机仿真结果表明:该算法能够满足人眼对含水印图像的质量要求,重建的水印与原水印图像相似度高;该算法能够抵抗常见的多种攻击并兼顾了水印安全性与不可见性,在版权保护与信息隐藏的实际应用中具有重要意义。

Robust Holographic Watermarking Algorithm

A robust transformed domain watermarking algorithm is proposed.The host image of RGB mode was split to channels,than conversed to transformed domain using DCT.Both Fourier hologram and SVD were used to improve the bad anti-filtering ability and irresistible rotating ability of traditional holographic watermark.Simulation results indicated that this algorithm can satisfy the visual quality demand of color watermarked images,and the correlation between reconstructed watermark and original watermark is high;the watermarking algorithm is able to resist common attacks and takes the robustness,security and invisibility all into account.So it has important practical significance in the field of copyright protection and information hiding.