数字水印技术是多媒体信息安全领域的一个重要的研究课题。文章在对宿主图像小波低频子带进行纹理块检测的基础上,提出一种基于提升方案小波和纹理块曲图像鲁棒水印算法。该算法可以自适应的确定出二值图像水印在中频子带的嵌入强度,从而保证了所嵌入的水印在不可见性的前提下对常见的一些图像处理操作具有很强的鲁棒性。试验结果验证了所提出方法的有效性。
Digital watermark technique is one of the most active research topics in the safety field of multimedia information .On the basis of research on texture blocks in the low frequency bands of wavelet coefficients of the original image, This paper proposed a robustious image watermarking scheme based on lifting scheme wavelet and texture blocks.It can decide the watermarking intensity embedded in the intermediate frequency bands of wavelet coefficients of the original image in art adaptive manner. The algorithm has very strong robustness for some common image processing operations. Simulation results show it is effective.