一种基于Cox框架与卷积码的图像水印算法

提出一种新的图像水印算法。算法基于Cox水印系统框架思想,利用高维空间中高斯伪随机信号的正交性,把传统数字通信的正交调制与卷积纠错码结合起来,实现一种卷积正交调制水印编码。与文献现有的传统多符号正交调制相比,得到了码距更大的水印信息向量集,从而提高嵌入有效性、改善水印系统性能。

A New Watermarking Algorithm for Images Based on Cox Framework and Trellis Code

In this paper, we propose a new watermarking algorithm for images. The scheme combines traditional orthogonal modulation and trellis code to realize a kind of orthogonal trellis watermarking code for images based on Cox framework. The algorithm enlarges the code separation among the watermark vector set, so it can improve the embedding effectiveness essentially and get better performance in watermarking systems.