一种强鲁棒性的图像数字水印算法的设计

针对当前图像水印的研究现状和存在的问题,提出了一种基于离散小波变换域的数字水印算法。该算法选择在原始图像小波变换的中、低频子带嵌入水印,提高了水印的容量和不可见性。并结合人类视觉系统模型,实现了水印的强鲁棒性。对所提出的算法进行了大量的实验及性能分析。实验结果表明,该算法对常见的图像攻击如JPEG压缩、加噪、剪切等具有较强的鲁棒性,同时也很好地保证了水印的不可见性。

A Strong Robust Image Watermarking Algorithm Design

Aiming at the current image watermark research status and existing problems,the article proposes a digital watermarking algorithm based on the discrete wavelet transform.By choosing low and middle sub band of the wavelet packet decomposition of the original image to embed the watermark,the algorithm increases the capacity of the watermark and improves the imperceptibility.With the combination of HVS model,the robustness of watermark is achieved.Quantities of experiment data show that the algorithm has good ...