基于独立分量分析的数字图像水印研究

多媒体信息的数字化与网络技术的发展为信息的表达提供极大的便利．同时也引发了作品的非法访问、故意纂改、版权破坏等一系列问题。数字水印是嵌入宿主数据中具有隐蔽性且不容易去除的数字信息，是一种数字图像版权保护的关键技术。文中提出一种基于独立分量分析的数字水印处理技术，利用宿主图像、水印、密钥三者统计独立的特性构造水印嵌入和检测系统。实验结果表明，文中提出的方法可以有效提取数字水印，对图像的滤波、噪声干扰和尺度缩放等操作具有良好的稳健性。

A Method for Digital Image Watermarking Using ICA

The development of multimedia information and network technology brings great conveniences to the expression of information. At the same time, it brings problems such as illegal access, malicious tampering and break of copyright. A digital watermark is the information that is imperceptibly and robustly embedded in the host data such that it cannot be removed. It is a key technology for the protection of digital image copyright. This paper proposes an ICA based watermark technology, using characteristic of the statistic independence of the host image, watermark and key, watermark embedment and detection system is constructed. Experimental result is presented to demonstrate the capacity of our system to detect watermark and the robustness to image filtering, noise interrupting and scale zoom.