基于极性的立体图像盲数字水印算法

针对平面图像水印算法不能很好地适用于立体图像的问题,在平面图像版权保护算法的基础上,提出一种新的立体图像盲数字水印算法,并进行了仿真研究.首先将立体图像分块并定义图像块的极性,然后基于左右图像块的极性与水印信息之间的关系嵌入水印:如果水印信息是零,则需要通过改变对应图像块的极性,使得两极性相反;反之则使两极性相同.在水印提取过程中,只要判断左右图像块极性的关系即可提取水印信息,实现了水印的盲提取.攻击实验结果表明该算法是可行的、有效的.

Robustness of Blind Digital Watermarking Algorithm Based on Polar Stereo Image

To address the problem that the graphic image watermarking algorithm can''t well apply to stereo images, a blind stereoscopic image watermarking algorithm has been proposed, and conduct simulation been studied. Firstly, the stereoscopic image is blocked and the polarity of the divided blocks are defined, and then the watermark is embedded by modulating the relationship between watermark and the polarity of the divided blocks:if the watermark information is zero, the polarity of the corresponding image block need changing to make the bipolar opposite; otherwise make the same polarities. In the process of watermark extraction, watermark information can be extracted as long as the relationship between image blocks polarity is judged, achieve the blind watermark extraction. Through related attacks experiments, the results show that the algorithm has strong robustness. The stereo image blind watermarking algorithm is feasible and effective.