基于立体图像水印算法的研究

提出了一种基于全局视差和左右视图图像块间对应关系的立体图像水印算法，来解决立体图像的版权保护和内容认证的问题。首先根据立体图像的左右视图求出立体图像的全局视差，然后找到左右视图的相似区域，最后相似区域内基于左右图像的对应关系完成水印的嵌入。由于DC系数是块能量的集中区域，其左右图像块间的对应关系比较稳定，所以本文选择左右图像Y分量DC系数进行水印的嵌入，这样可以提高水印的鲁棒性。仿真实验结果表明，水印具有很好的不可见性和较高的鲁棒性，能够抵抗高强度jpeg压缩、高斯和SBS编码攻击。

Watermarking Algorithm Research Based on Stereo Images

The paper is to propose a three-dimensional image watermarking algorithm according to the global disparity and the corresponding relationship between the left view and the right view, which can solve the stereo image copyright protection and content authentication problem . Firstly,analyze the char-acteristics of stereo images,compute the global disparity according to the left and right views,then work out their similar area. Taking advantage of the corresponding relationship between the left view and the right view,we embed the watermark into the similar area. The block energy gathers in the DC coefficients whose corresponding relationship is stable in the left and right views. In this sense,we choose the DC co-efficients of Y component for embedding watermark,which can make a higher robustness watermark. The simulation experimental results show that the watermark is remarked for invisibility and high robustness, and is resistant to high strength jpeg compression,Gaussian and SBS code attack as well.