一种基于ICA的图像水印方法

A Digital Watermarking Scheme Based on ICA

本文提出了一种结合离散小波变换(DWT)、离散余弦变换(DCT)和独立分量分析(ICA)的图像数字水印方法。该方法把原始图像进行二维小波分解,保留其高频细节信息,然后对小波逼近子图进行离散余弦变换并嵌入水印。水印的检测使用了ICA方法。实验结果表明该水印方案很好的实现了水印的鲁棒性与不可见性的统一,对各种攻击具有很好的鲁棒性。同时由于ICA方法的引入,较好的改善了水印的检测效果。

A scheme of digital image watermarking using the combination of discrete wavelet transform (DWT), discrete cosine transform(DCT) and independent components analysis(ICA) is proposed. At first, the original image is decomposed by 2-D DWT and the detail sub-bands are reserved. Then, the approximation image is transformed by DCT and embedded with watermark. The watermark is detected resorting to ICA. The experimental results demonstrate its good unification between the robustness and invisibility. And due to the use of ICA the watermark detection is improved greatly.